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mechanisms.
BSI-100: HYBRID ASSEMBLIES BSI-100: Hybrid Assemblies. “Code world” is an interesting place where seemingly convoluted language is used to express simple concepts in clearly complicated ways. The reasons for this are based on “legal” principles and the desire to be “non-proprietary” even though the “proprietary” part is typically pretty obvious.BASEMENT INSULATION
Info-511: Basement Insulation. Building Science Corporation. May 20, 2009. Basements are part of a home, within the building boundary—despite repeated attempts over the years to disconnect them from the living space. Because of this, basementsJOSEPH LSTIBUREK
Joseph Lstiburek is the founding principal of Building Science Corporation. Dr. Lstiburek’s work ranges widely, from providing expert witness testimony to overseeing research and development projects, to writing for the ASHRAE Journal and buildingscience.com. Dr. Lstiburek’s commitment to advancing the building industry has had a lasting impact on building codes and practices throughout DECKS–ROOFS YOU CAN WALK ON BSI-051: Decks—Roofs You Can Walk On. Joseph Lstiburek. July 13, 2011. Decks are disarmingly simple. The ones we are going to deal with have conditioned space under them. They are nothing more than roofs that you walk on. But we tend to mess them up royally. Perhaps it is because we forget that they really are roofs and have to follow allthe
DAM ICE DAM
BSI-046: Dam Ice Dam. Joseph Lstiburek. February 8, 2011. Ice dams ( Photograph 1) happen when the outside temperature is below freezing, the roof deck temperature is above freezing, and there is snow on the roof. 1 The warm roof deck causes the snow on top of the roof deck to melt, and the melt water runs down to the edge of the roof where the GM-2101: GUIDE FOR BUILDING CONDITIONED UNVENTED ATTICS Introduction. This guide provides information on how to construct vapor diffusion ports when using fiberglass and mineral wool insulation with conditioned unvented attics and unconditioned unvented attics in International Energy Conservation Code (IECC) Climate Zones1, 2 and 3.
RR-0401 CONDITIONED CRAWL SPACE CONSTRUCTION building america systems engineering approach to development of advanced residential buildings 5.c.2.4 conditioned crawl space construction, performance and codes re:task order no.kaax-3-32443-4, 5, and 6 under task ordering agreement no.kar-8-18412-00 midwest research institute, national renewable energy laboratory division, 1617 cole boulevard, golden, co BUILDING SCIENCE CORPORATION BSC, a consulting and architecture firm is an industry recognized leader in building technology for commercial, institutional, and residential applications. BOOKSTORE | BUILDING SCIENCE CORPORATION We publish a variety of high-quality books to grow the building industry, providing trusted information about building physics and systems design concepts. BSI-120: UNDERSTANDING WALLS* BSI-120: Understanding Walls*. Joseph Lstiburek. December 15, 2020. Wall assembly design and construction needs to consider rain, temperature, humidity as defined by the hygro-thermal regions, annual rainfall and the interior climate classes as environmental loads that affect mold, decay and corrosion as well as other degradationmechanisms.
BSI-100: HYBRID ASSEMBLIES BSI-100: Hybrid Assemblies. “Code world” is an interesting place where seemingly convoluted language is used to express simple concepts in clearly complicated ways. The reasons for this are based on “legal” principles and the desire to be “non-proprietary” even though the “proprietary” part is typically pretty obvious.BASEMENT INSULATION
Info-511: Basement Insulation. Building Science Corporation. May 20, 2009. Basements are part of a home, within the building boundary—despite repeated attempts over the years to disconnect them from the living space. Because of this, basementsJOSEPH LSTIBUREK
Joseph Lstiburek is the founding principal of Building Science Corporation. Dr. Lstiburek’s work ranges widely, from providing expert witness testimony to overseeing research and development projects, to writing for the ASHRAE Journal and buildingscience.com. Dr. Lstiburek’s commitment to advancing the building industry has had a lasting impact on building codes and practices throughout DECKS–ROOFS YOU CAN WALK ON BSI-051: Decks—Roofs You Can Walk On. Joseph Lstiburek. July 13, 2011. Decks are disarmingly simple. The ones we are going to deal with have conditioned space under them. They are nothing more than roofs that you walk on. But we tend to mess them up royally. Perhaps it is because we forget that they really are roofs and have to follow allthe
DAM ICE DAM
BSI-046: Dam Ice Dam. Joseph Lstiburek. February 8, 2011. Ice dams ( Photograph 1) happen when the outside temperature is below freezing, the roof deck temperature is above freezing, and there is snow on the roof. 1 The warm roof deck causes the snow on top of the roof deck to melt, and the melt water runs down to the edge of the roof where the GM-2101: GUIDE FOR BUILDING CONDITIONED UNVENTED ATTICS Introduction. This guide provides information on how to construct vapor diffusion ports when using fiberglass and mineral wool insulation with conditioned unvented attics and unconditioned unvented attics in International Energy Conservation Code (IECC) Climate Zones1, 2 and 3.
RR-0401 CONDITIONED CRAWL SPACE CONSTRUCTION building america systems engineering approach to development of advanced residential buildings 5.c.2.4 conditioned crawl space construction, performance and codes re:task order no.kaax-3-32443-4, 5, and 6 under task ordering agreement no.kar-8-18412-00 midwest research institute, national renewable energy laboratory division, 1617 cole boulevard, golden, co BOOKSTORE | BUILDING SCIENCE CORPORATION We publish a variety of high-quality books to grow the building industry, providing trusted information about building physics and systems design concepts. BALANCED VENTILATION SYSTEMS Balanced Ventilation Systems (HRVs & ERVs) A balanced ventilation system (as opposed to supply-only or exhaust-only system) has two fans: one bringing outside air into the building, and the other exhausting stale interior air, resulting in roughly balanced airflows. These systems do not significantly affect the pressure of the interiorspace
GM-2103: COMMERCIAL SPRAY FOAM GUIDE GM-2103: Commercial Spray Foam Guide. Joseph Lstiburek. January 31, 2021. OVERVIEW. Spray foam insulation has significant advantages over other insulation systems due to the spray foam ability to provide continuity of the water control, air control, vapor control and thermal control layers necessary for environmental separation. ETW: WALL - TRUSS WALL CONSTRUCTION Building Science Corporation. November 15, 2014. This overview summarizes the truss wall construction including the advantages and disadvantages of this construction strategy. Complex two dimensional heat flow analysis and one dimensional hygrothermal modeling were used to determine moisture related durability risks for analysis. Cladding. BSI-093: ALL DECKED OUT* BSI-093: All Decked Out*. We are adding balconies to everything and people are forgetting that balconies are more than decoration but also have to function. And when we get it wrong it can be catastrophic 2. We are going to be dealing with wood balconies due to their popularity and because they tend to get done wrong more often than concrete INFO-606: PLACEMENT OF INTAKE AND EXHAUST VENTS Ventilation system intakes must be sufficiently separated away from potential contaminant sources, and locations of dust and debris. Mechanical sealed combustion equipment intake should also be located away from likely sources of dust and debris. RR-0406: FACE SEALED VS. DRAINABLE EIFS Unlike face-sealed or barrier systems – except where they are used in hot-dry climates, drainable EIFS are not inherently defective and therefore are fit for use as an exterior cladding system in most climates. Drainable EIFS are not subject to the same limitations of use of face-sealed or barrier systems. In fact, drainable EIFS areamong
RR-0401 CONDITIONED CRAWL SPACE CONSTRUCTION building america systems engineering approach to development of advanced residential buildings 5.c.2.4 conditioned crawl space construction, performance and codes re:task order no.kaax-3-32443-4, 5, and 6 under task ordering agreement no.kar-8-18412-00 midwest research institute, national renewable energy laboratory division, 1617 cole boulevard, golden, co TEMPERATURE DEPEND. OF R-VALUES IN PIR ROOF INSULATION The Rule requires that R-value tests be conducted at a mean temperature of 75°F (23.9°C) and a temperature differential of 50°F (27.8°C). This means that insulation is usually tested with the cold side at 50°F (10°C) and the warm side at 100°F (37.8°C). 3. The R-value Rule only applies to insulation products that are marketed andsold
ETW: FOUNDATION
This construction uses c ontinuous R-10 or R-13 batt insulation on the interior of the concrete foundation wall. The slab is left uninsulated and the rim joist is insulated with batt insulation. According to the IECC, new residential construction of conditioned basements in DOE climate zones 4 and greater must be constructed with continuous R-10 insulation or R-13 in a framed wall. BUILDING SCIENCE CORPORATION BSC, a consulting and architecture firm is an industry recognized leader in building technology for commercial, institutional, and residential applications. BOOKSTORE | BUILDING SCIENCE CORPORATION We publish a variety of high-quality books to grow the building industry, providing trusted information about building physics and systems design concepts.THE BSC TEAM
Joseph Lstiburek is the founding principal of Building Science Corporation. Dr. Lstiburek’s work ranges widely, from providing expert witness testimony to overseeing research and development projects, to writing for the ASHRAE Journal and buildingscience.com. Dr. Lstiburek’s commitment to advancing the building industry has had a lasting impact on building codes and practices throughoutJOSEPH LSTIBUREK
Joseph Lstiburek is the founding principal of Building Science Corporation. Dr. Lstiburek’s work ranges widely, from providing expert witness testimony to overseeing research and development projects, to writing for the ASHRAE Journal and buildingscience.com. Dr. Lstiburek’s commitment to advancing the building industry has had a lasting impact on building codes and practices throughoutBASEMENT INSULATION
Info-511: Basement Insulation. Building Science Corporation. May 20, 2009. Basements are part of a home, within the building boundary—despite repeated attempts over the years to disconnect them from the living space. Because of this, basements BSI-067: STUCK ON YOU BSI-067: Stuck On You. Joseph Lstiburek. April 15, 2013. One of the dirty little secrets that never gets talked about is that water leaks through building papers, building wraps and housewraps and runs down between them and the sheathings that they cover. The water enters through nail holes and staple holes and sometimes just through thefield
GM-0602: READ THIS: BEFORE YOU DESIGN, BUILD OR RENOVATE GM-0602: READ THIS: Before You Design, Build or Renovate. Joseph Lstiburek. May 15, 2005. This pamphlet is designed for members of the residential construction and remodeling industries, as well as owners and managers who work in affordable housing. It presents building guidance for both new construction and rehabilitation, as well aspractices
BUILDER'S GUIDE TO COLD CLIMATES Cold - A cold climate is defined as a region with approximately 5,400 heating degree days (65°F basis) or greater and less than approximately 9,000 heating degree days (65°F basis). Mixed-Humid - A mixed-humid and warm-humid climate is defined as a region that receives more than 20 inches of annual precipitation withapproximately 4,500
RR-0401 CONDITIONED CRAWL SPACE CONSTRUCTION building america systems engineering approach to development of advanced residential buildings 5.c.2.4 conditioned crawl space construction, performance and codes re:task order no.kaax-3-32443-4, 5, and 6 under task ordering agreement no.kar-8-18412-00 midwest research institute, national renewable energy laboratory division, 1617 cole boulevard, golden, coETW: FOUNDATION
This construction uses c ontinuous R-10 or R-13 batt insulation on the interior of the concrete foundation wall. The slab is left uninsulated and the rim joist is insulated with batt insulation. According to the IECC, new residential construction of conditioned basements in DOE climate zones 4 and greater must be constructed with continuous R-10 insulation or R-13 in a framed wall. BUILDING SCIENCE CORPORATION BSC, a consulting and architecture firm is an industry recognized leader in building technology for commercial, institutional, and residential applications. BOOKSTORE | BUILDING SCIENCE CORPORATION We publish a variety of high-quality books to grow the building industry, providing trusted information about building physics and systems design concepts.THE BSC TEAM
Joseph Lstiburek is the founding principal of Building Science Corporation. Dr. Lstiburek’s work ranges widely, from providing expert witness testimony to overseeing research and development projects, to writing for the ASHRAE Journal and buildingscience.com. Dr. Lstiburek’s commitment to advancing the building industry has had a lasting impact on building codes and practices throughoutJOSEPH LSTIBUREK
Joseph Lstiburek is the founding principal of Building Science Corporation. Dr. Lstiburek’s work ranges widely, from providing expert witness testimony to overseeing research and development projects, to writing for the ASHRAE Journal and buildingscience.com. Dr. Lstiburek’s commitment to advancing the building industry has had a lasting impact on building codes and practices throughoutBASEMENT INSULATION
Info-511: Basement Insulation. Building Science Corporation. May 20, 2009. Basements are part of a home, within the building boundary—despite repeated attempts over the years to disconnect them from the living space. Because of this, basements BSI-067: STUCK ON YOU BSI-067: Stuck On You. Joseph Lstiburek. April 15, 2013. One of the dirty little secrets that never gets talked about is that water leaks through building papers, building wraps and housewraps and runs down between them and the sheathings that they cover. The water enters through nail holes and staple holes and sometimes just through thefield
GM-0602: READ THIS: BEFORE YOU DESIGN, BUILD OR RENOVATE GM-0602: READ THIS: Before You Design, Build or Renovate. Joseph Lstiburek. May 15, 2005. This pamphlet is designed for members of the residential construction and remodeling industries, as well as owners and managers who work in affordable housing. It presents building guidance for both new construction and rehabilitation, as well aspractices
BUILDER'S GUIDE TO COLD CLIMATES Cold - A cold climate is defined as a region with approximately 5,400 heating degree days (65°F basis) or greater and less than approximately 9,000 heating degree days (65°F basis). Mixed-Humid - A mixed-humid and warm-humid climate is defined as a region that receives more than 20 inches of annual precipitation withapproximately 4,500
RR-0401 CONDITIONED CRAWL SPACE CONSTRUCTION building america systems engineering approach to development of advanced residential buildings 5.c.2.4 conditioned crawl space construction, performance and codes re:task order no.kaax-3-32443-4, 5, and 6 under task ordering agreement no.kar-8-18412-00 midwest research institute, national renewable energy laboratory division, 1617 cole boulevard, golden, coETW: FOUNDATION
This construction uses c ontinuous R-10 or R-13 batt insulation on the interior of the concrete foundation wall. The slab is left uninsulated and the rim joist is insulated with batt insulation. According to the IECC, new residential construction of conditioned basements in DOE climate zones 4 and greater must be constructed with continuous R-10 insulation or R-13 in a framed wall.INFORMATION SEARCH
This report analyzes the performance of walls clad with HardiePlank fiber cement siding and compares them to traditional stucco assemblies. The data presented is a subset of experimental data from a multi-phase, multi-year research project at the Vancouver Field Exposure Test Facility led by Building Science Corporation (BSC) and Gauvin 2000 Construction Limited.THE BSC TEAM
Joseph Lstiburek is the founding principal of Building Science Corporation. Dr. Lstiburek’s work ranges widely, from providing expert witness testimony to overseeing research and development projects, to writing for the ASHRAE Journal and buildingscience.com. Dr. Lstiburek’s commitment to advancing the building industry has had a lasting impact on building codes and practices throughoutBSI-113: STONED...
The issues with stucco are pretty well understood and we have discussed them in detail before (“BSI-102: The Coming Stucco-Pocalypse”, January 2018 and “BSI-029: Stucco Woes – The Perfect Storm”, January 2010). Drainage, drainage and drainage are the keyDid I mention drainage? Also, inward vapor drive. Did I mentionthat as well?
DECKS–ROOFS YOU CAN WALK ON BSI-051: Decks—Roofs You Can Walk On. Joseph Lstiburek. July 13, 2011. Decks are disarmingly simple. The ones we are going to deal with have conditioned space under them. They are nothing more than roofs that you walk on. But we tend to mess them up royally. Perhaps it is because we forget that they really are roofs and have to follow allthe
DEW POINT | BUILDING SCIENCE CORPORATION The temperature at which the relative humidity of a sample of air with constant water vapor reaches 100%. The air is saturated with water when it reaches the dew point and condensation will occur on a surface. Related terms: Condensation Related resources: BSI-049: Confusion About Diffusion; RR-0203: Relative Humidity BSI-065: BUT I WAS SO MUCH YOUNGER THEN (I'M SO MUCH OLDER An edited version of this Insight first appeared in the ASHRAE Journal. In 1978 I was 23 years old. I was a builder. I thought I was one anyway. My dad was a builder and an engineer and he taught me stuff. I learned building from him. I of course was smarter than he was. I got my own engineering degree and left him and went out on my own because who would ever want to work for BSI-011: CAPILLARITY—SMALL SACRIFICES BSI-011: Capillarity—Small Sacrifices. Water causes enough trouble by itself, but when we add salt we go to a whole different level, especially where porous materials are concerned. What is the deal with porous materials? Simple, porous materials are capable of wicking water large distances due to capillary suction ( 1 ). RR-0404: ROOF DESIGN R-46 Unvented Roof Assembly—Two layers of R-6.5/inch rigid insulation yielding a total combined thickness of 2.5 inches; layers of rigid insulation have staggered joints to facilitate airtightness; two layers are preferable to one layer due to increase in air flow resistance: There is no potential for condensation until interior moisture levels exceed 45% RH at 70°F during the coldest month PA-0301: WATER-MANAGED WALL SYSTEMS In the top photo in Figure 1, next page, I'm conducting a sophisticated engineering test on the rain holdout characteristics of a cladding material.I'm spraying the brick veneer wall of a garage with a garden hose. I have a wager going with people inside the garage — I'm asking them to guess how long it will take, under the conditions of this test, for water to pass through the brick veneer. INFO-407: AIR BARRIERS—TUB, SHOWER AND FIREPLACE Info-407: Air Barriers—Tub, Shower and Fireplace Enclosures. Some common locations for large holes in the air barrier include bathtubs, showers, fireplace enclosures, and chimneys. Holes behind tub and shower enclosures are common, as these enclosures are often installed before the interior-side air barrier of the exterior wall. BUILDING SCIENCE CORPORATION BSC, a consulting and architecture firm is an industry recognized leader in building technology for commercial, institutional, and residential applications. BOOKSTORE | BUILDING SCIENCE CORPORATION We publish a variety of high-quality books to grow the building industry, providing trusted information about building physics and systems design concepts.THE BSC TEAM
Joseph Lstiburek is the founding principal of Building Science Corporation. Dr. Lstiburek’s work ranges widely, from providing expert witness testimony to overseeing research and development projects, to writing for the ASHRAE Journal and buildingscience.com. Dr. Lstiburek’s commitment to advancing the building industry has had a lasting impact on building codes and practices throughoutJOSEPH LSTIBUREK
Joseph Lstiburek is the founding principal of Building Science Corporation. Dr. Lstiburek’s work ranges widely, from providing expert witness testimony to overseeing research and development projects, to writing for the ASHRAE Journal and buildingscience.com. Dr. Lstiburek’s commitment to advancing the building industry has had a lasting impact on building codes and practices throughoutBASEMENT INSULATION
Info-511: Basement Insulation. Building Science Corporation. May 20, 2009. Basements are part of a home, within the building boundary—despite repeated attempts over the years to disconnect them from the living space. Because of this, basements BSI-067: STUCK ON YOU BSI-067: Stuck On You. Joseph Lstiburek. April 15, 2013. One of the dirty little secrets that never gets talked about is that water leaks through building papers, building wraps and housewraps and runs down between them and the sheathings that they cover. The water enters through nail holes and staple holes and sometimes just through thefield
GM-0602: READ THIS: BEFORE YOU DESIGN, BUILD OR RENOVATE GM-0602: READ THIS: Before You Design, Build or Renovate. Joseph Lstiburek. May 15, 2005. This pamphlet is designed for members of the residential construction and remodeling industries, as well as owners and managers who work in affordable housing. It presents building guidance for both new construction and rehabilitation, as well aspractices
BUILDER'S GUIDE TO COLD CLIMATES Cold - A cold climate is defined as a region with approximately 5,400 heating degree days (65°F basis) or greater and less than approximately 9,000 heating degree days (65°F basis). Mixed-Humid - A mixed-humid and warm-humid climate is defined as a region that receives more than 20 inches of annual precipitation withapproximately 4,500
RR-0401 CONDITIONED CRAWL SPACE CONSTRUCTIONPROPER CRAWL SPACE CONSTRUCTIONBUILDING A CONDITIONED CRAWL SPACECONDITIONED CRAWL SPACECRAWL SPACE CONSTRUCTION DETAILSCRAWL SPACE CONSTRUCTION METHODSCONDITIONED CRAWL SPACE NEW CONSTRUCTION building america systems engineering approach to development of advanced residential buildings 5.c.2.4 conditioned crawl space construction, performance and codes re:task order no.kaax-3-32443-4, 5, and 6 under task ordering agreement no.kar-8-18412-00 midwest research institute, national renewable energy laboratory division, 1617 cole boulevard, golden, coETW: FOUNDATION
This construction uses c ontinuous R-10 or R-13 batt insulation on the interior of the concrete foundation wall. The slab is left uninsulated and the rim joist is insulated with batt insulation. According to the IECC, new residential construction of conditioned basements in DOE climate zones 4 and greater must be constructed with continuous R-10 insulation or R-13 in a framed wall. BUILDING SCIENCE CORPORATION BSC, a consulting and architecture firm is an industry recognized leader in building technology for commercial, institutional, and residential applications. BOOKSTORE | BUILDING SCIENCE CORPORATION We publish a variety of high-quality books to grow the building industry, providing trusted information about building physics and systems design concepts.THE BSC TEAM
Joseph Lstiburek is the founding principal of Building Science Corporation. Dr. Lstiburek’s work ranges widely, from providing expert witness testimony to overseeing research and development projects, to writing for the ASHRAE Journal and buildingscience.com. Dr. Lstiburek’s commitment to advancing the building industry has had a lasting impact on building codes and practices throughoutJOSEPH LSTIBUREK
Joseph Lstiburek is the founding principal of Building Science Corporation. Dr. Lstiburek’s work ranges widely, from providing expert witness testimony to overseeing research and development projects, to writing for the ASHRAE Journal and buildingscience.com. Dr. Lstiburek’s commitment to advancing the building industry has had a lasting impact on building codes and practices throughoutBASEMENT INSULATION
Info-511: Basement Insulation. Building Science Corporation. May 20, 2009. Basements are part of a home, within the building boundary—despite repeated attempts over the years to disconnect them from the living space. Because of this, basements BSI-067: STUCK ON YOU BSI-067: Stuck On You. Joseph Lstiburek. April 15, 2013. One of the dirty little secrets that never gets talked about is that water leaks through building papers, building wraps and housewraps and runs down between them and the sheathings that they cover. The water enters through nail holes and staple holes and sometimes just through thefield
GM-0602: READ THIS: BEFORE YOU DESIGN, BUILD OR RENOVATE GM-0602: READ THIS: Before You Design, Build or Renovate. Joseph Lstiburek. May 15, 2005. This pamphlet is designed for members of the residential construction and remodeling industries, as well as owners and managers who work in affordable housing. It presents building guidance for both new construction and rehabilitation, as well aspractices
BUILDER'S GUIDE TO COLD CLIMATES Cold - A cold climate is defined as a region with approximately 5,400 heating degree days (65°F basis) or greater and less than approximately 9,000 heating degree days (65°F basis). Mixed-Humid - A mixed-humid and warm-humid climate is defined as a region that receives more than 20 inches of annual precipitation withapproximately 4,500
RR-0401 CONDITIONED CRAWL SPACE CONSTRUCTIONPROPER CRAWL SPACE CONSTRUCTIONBUILDING A CONDITIONED CRAWL SPACECONDITIONED CRAWL SPACECRAWL SPACE CONSTRUCTION DETAILSCRAWL SPACE CONSTRUCTION METHODSCONDITIONED CRAWL SPACE NEW CONSTRUCTION building america systems engineering approach to development of advanced residential buildings 5.c.2.4 conditioned crawl space construction, performance and codes re:task order no.kaax-3-32443-4, 5, and 6 under task ordering agreement no.kar-8-18412-00 midwest research institute, national renewable energy laboratory division, 1617 cole boulevard, golden, coETW: FOUNDATION
This construction uses c ontinuous R-10 or R-13 batt insulation on the interior of the concrete foundation wall. The slab is left uninsulated and the rim joist is insulated with batt insulation. According to the IECC, new residential construction of conditioned basements in DOE climate zones 4 and greater must be constructed with continuous R-10 insulation or R-13 in a framed wall.INFORMATION SEARCH
This report analyzes the performance of walls clad with HardiePlank fiber cement siding and compares them to traditional stucco assemblies. The data presented is a subset of experimental data from a multi-phase, multi-year research project at the Vancouver Field Exposure Test Facility led by Building Science Corporation (BSC) and Gauvin 2000 Construction Limited.THE BSC TEAM
Joseph Lstiburek is the founding principal of Building Science Corporation. Dr. Lstiburek’s work ranges widely, from providing expert witness testimony to overseeing research and development projects, to writing for the ASHRAE Journal and buildingscience.com. Dr. Lstiburek’s commitment to advancing the building industry has had a lasting impact on building codes and practices throughoutBSI-113: STONED...
The issues with stucco are pretty well understood and we have discussed them in detail before (“BSI-102: The Coming Stucco-Pocalypse”, January 2018 and “BSI-029: Stucco Woes – The Perfect Storm”, January 2010). Drainage, drainage and drainage are the keyDid I mention drainage? Also, inward vapor drive. Did I mentionthat as well?
DECKS–ROOFS YOU CAN WALK ON BSI-051: Decks—Roofs You Can Walk On. Joseph Lstiburek. July 13, 2011. Decks are disarmingly simple. The ones we are going to deal with have conditioned space under them. They are nothing more than roofs that you walk on. But we tend to mess them up royally. Perhaps it is because we forget that they really are roofs and have to follow allthe
DEW POINT | BUILDING SCIENCE CORPORATION The temperature at which the relative humidity of a sample of air with constant water vapor reaches 100%. The air is saturated with water when it reaches the dew point and condensation will occur on a surface. Related terms: Condensation Related resources: BSI-049: Confusion About Diffusion; RR-0203: Relative Humidity BSI-065: BUT I WAS SO MUCH YOUNGER THEN (I'M SO MUCH OLDER An edited version of this Insight first appeared in the ASHRAE Journal. In 1978 I was 23 years old. I was a builder. I thought I was one anyway. My dad was a builder and an engineer and he taught me stuff. I learned building from him. I of course was smarter than he was. I got my own engineering degree and left him and went out on my own because who would ever want to work for BSI-011: CAPILLARITY—SMALL SACRIFICES BSI-011: Capillarity—Small Sacrifices. Water causes enough trouble by itself, but when we add salt we go to a whole different level, especially where porous materials are concerned. What is the deal with porous materials? Simple, porous materials are capable of wicking water large distances due to capillary suction ( 1 ). RR-0404: ROOF DESIGN R-46 Unvented Roof Assembly—Two layers of R-6.5/inch rigid insulation yielding a total combined thickness of 2.5 inches; layers of rigid insulation have staggered joints to facilitate airtightness; two layers are preferable to one layer due to increase in air flow resistance: There is no potential for condensation until interior moisture levels exceed 45% RH at 70°F during the coldest month PA-0301: WATER-MANAGED WALL SYSTEMS In the top photo in Figure 1, next page, I'm conducting a sophisticated engineering test on the rain holdout characteristics of a cladding material.I'm spraying the brick veneer wall of a garage with a garden hose. I have a wager going with people inside the garage — I'm asking them to guess how long it will take, under the conditions of this test, for water to pass through the brick veneer. INFO-407: AIR BARRIERS—TUB, SHOWER AND FIREPLACE Info-407: Air Barriers—Tub, Shower and Fireplace Enclosures. Some common locations for large holes in the air barrier include bathtubs, showers, fireplace enclosures, and chimneys. Holes behind tub and shower enclosures are common, as these enclosures are often installed before the interior-side air barrier of the exterior wall. Skip to main content Search All Documents* About
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Renovation and RehabilitationSee All Events
A building science consulting and full service architecture firm specializing in building technology for all types of buildings including commercial, institutional, and residential.UPCOMING EVENTS
Building Science Fundamentals Live virtual seminar | July 13, July 15, July 20, July 22, 2021 |16 AIA CEU credits
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Renovation and Rehabilitation Live virtual seminar| August 31, September 02, 2021 | 8 AIA CEUcredits
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Building Science Fundamentals Live virtual seminar | September 7, September 9, September 14, September 16, 2021 | 16 AIA CEU creditsInformation
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BSI-124: Parking Garages*
BSI-123: Capillarity Sucks*
BSI-122: If You Want to Save Cash...Flash...*
BSI-121: The Big Blow*
GM-2103: Commercial Spray Foam Guide*
GM-2102: Residential Spray Foam Guide*
BSI-020: Wood Foundations - Picasso Does Foundations*
GM-2101: Guide For Building Conditioned Unvented Attics And Unconditioned Unvented Attics With Fiberglass And Mineral WoolInsulation
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BSI-120: Understanding Walls**
BSI-119: Conditioned Unconditioned Search All Documents* About
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