- CP
First presented at the CIB-W40 Meeting, Victoria, BC., September, 1989. Based on a paper presented at the Energy Efficient Building Association (EEBA) 5th Annual Conference and Exposition, November… Read More
- CP
Hygro-thermal regions, rain exposure zones and interior climate classes are defined as environmental loads to be used in applying limit states design to durability, building envelope and mechanical… Read More
- CP
Unvented roof assemblies can bring attic mechanical systems into conditioned space, negating ductwork losses. However, in previous work, unvented roofs with air-permeable (fibrous) insulation,… Read More
Hot-Humid
- CP
A circa 1917 construction mass masonry building located on a Boston-area university campus was retrofitted with interior polyurethane spray foam insulation. Sensors were installed in the retrofitted… Read More
- CP
There is a large existing stock of uninsulated mass masonry buildings: their uninsulated walls result in poor energy performance, which is commonly addressed with the retrofit of interior insulation… Read More
- CP
A homebuilder in the New England area has been building net zero energy single family homes since 2008 and is continuing with multiple small-scale subdivisions of 20 or more homes. This builder… Read More
Cold
- CP
A startup builder in the San Francisco Bay Area has a goal of producing factory built/modular houses with net zero energy performance. Their first prototype was a two-story, two bedroom, urban infill… Read More
Marine
- CP
The influence of vapor barriers on the hygrothermal performance of wall and roof systems is a function of exterior climate, interior climate, solar absorptance, rainwater absorption, and the vapor… Read More
- CP
This paper is from the proceedings of the Thermal Performance of the Exterior Envelopes of Whole Buildings XI International Conference, December 5-9, 2010 in Clearwater, Florida. This paper… Read More
- CP
Exterior insulation retrofit is a reasonable step if a recladding of the building is already being done for aesthetic or ongoing maintenance reasons. This paper presents many of the lessons learned… Read More
Cold
- CP
This paper evaluates the performance of typical residential wall systems that incorporate water-resistive barriers with a range of vapor permeability. These systems included both absorbent and… Read More
Hot-Humid
- CP
Improved energy efficiency building enclosures generally means an increase in R-value and reduced air leakage, which commonly reduces the drying potential of wall assemblies. Essentially, less energy… Read More
- CP
Tankless water heaters offer significant energy savings over conventional storage-tank water heaters, because thermal losses to the environment are much less. Although standard test results are… Read More
- CP
A single-story, single-family, 1350 sq. ft. house located in Las Vegas, NV was outfitted with two separate ventilation systems. The systems were independent of each other, and were operated at… Read More
Hot-Dry/Mixed-Dry
- CP
Side-by-side energy testing and monitoring was conducted on two houses in Louisville, KY. Both houses were identical except that one house was constructed with conventional U.S. 2x4 studs and a truss… Read More
Mixed-Humid
- CP
They will sell for under $80,000 each, making them affordable to families earning less than 80 percent of the median income in the Dallas metropolitan area (under $35,000). Monthly payments will… Read More
Mixed-Humid
- CP
The issue becomes even more complex when you realize that you can replace the word humidity in the previous sentences with the words "indoor air quality " and not change the meaning or impact.… Read More
Hot-Humid
- CP
This paper describes a fully instrumented large-scale mock-up completed in a southern Ontario private school to allow direct comparisons between insulated and non-insulated walls with a focus on the… Read More
Cold
- CP
The software CONTAM was used to create a calibrated multi-zone model to replicate in-field tracer gas decay measurements of a new two story, 2600 ft2 (240 m2), single-family house in Sacramento, CA… Read More
Hot-Dry/Mixed-Dry
- CP
A method for quantitatively comparing dissimilar ventilation systems has been developed. A calibrated ventilation model was exercised over a range of parameters seen in new and existing housing in… Read More
- CP
Adhered veneers, in which masonry units are directly attached to a substrate via mortar and ties without a drainage or ventilation gap, have become a very popular finish in residential and light… Read More
Very Cold
- CP
The effects of solar heating potential and nocturnal cooling potential are simulated in a controlled indoor environment and extensive measurements are made along and between the boundary surfaces.… Read More
Hot-Humid
- CP
To characterize outside air distribution in residential buildings, this paper develops a practical methodology adapted from ASHRAE Standard 129. The methodology includes the examination of multi-zone… Read More
Hot-Dry/Mixed-Dry
- CP
Unvented cathedralized attic (UCA) assemblies, created by eliminating ventilation and by moving the thermal insulation and air barrier from the ceiling plane to the rafters, immediately below the… Read More
- CP
A range of house and mechanical system types were evaluated, including standard building enclosures and cooling systems and high-performance building envelopes with enhanced cooling or supplemental … Read More
Hot-Humid
- CP
This paper examines methods of using hygrothermal models, primarily WUFI, to assess the impact of energy efficient enclosure upgrades on the durability of historical buildings. Means of producing and… Read More
- CP
Providing rigid insulating sheathing to the exterior of a wall assembly is a technique that has been used in cold climates for more than 40 years. Recently it has begun to be integrated into… Read More
- BSI
So here we are…ready for the “big show”…but not quite at the big show. Think of it this way…to get to zero energy conservation takes us most of the way…and the last bit is the renewables piece. We… Read More
- BSI
Water is weird…and I point this out in an admiring manner… Water by itself is weird…it is a “polar molecule”…think “tiny magnets”….but when it changes phase from a liquid to a solid or from a liquid… Read More
- BSI
Snap, Crackle and Pop are beloved gnome characters…cartoon mascots of Rice Krispies breakfast cereal produced by a small company you might have heard of…Kellogg’s1. Rice Krispies are one of the best… Read More
- BSI
Where foundation insulation is on the exterior of foundations and touches the ground it needs to be protected.
Yes, this should be obvious, but it is often overlooked. One of the most overlooked… Read More
- BSI
To vent, or not to vent…that is the question:
Whether ‘tis nobler in the mind to suffer
The slings and arrows of outrageous moisture,
Or to take arms against them
And by opposing end them. To… Read More
- BSI
At the most basic level a building is an environmental separator – it keeps the outside out and the inside in. Why? Well, sometimes the outside sucks and we want to keep it from getting into the… Read More
- BSI
Imagine a world where the building code does not allow returns to be installed in closets to control mold and other contaminants. That would be insane right? Welcome to the real world.
Let me make… Read More
- BSI
HVAC systems and windows have almost as interesting a relationship as the “Odd Couple” - Oscar and Felix - did in the 70’s1. However, unlike Oscar and Felix’s relationship, the relationship between… Read More
Hot-Dry, Mixed-Dry, Very Cold, Cold, Mixed-Humid, Marine, Hot-Humid, Hot-Dry/Mixed-Dry
- BSI
I feel the earth move under my feet1
To state the obvious earthquakes are a major threat to the structural integrity of homes. New homes and existing homes need to be connected to foundations to… Read More
- BSI
I, as an engineer, am born with a genetic defect….as all engineers are…the “efficiency gene”. We can’t help ourselves. The more efficient a thing is…the better it is…in our engineering brains….I… Read More
- BSI
Stucco over concrete masonry units (“CMU’s)1 aka “block walls” is a Florida thing….that sometimes migrates north. We know a lot about how they work…but sometimes we forget… And then subtle things… Read More
- BSI
My pappy said, “Son you’re going to drive me to drinkin’ if you don’t stop framing that hot rod1 buildin’…” Have you heard the story of the frame wall race Where spruce and pine were settin’ the pace… Read More
- BSI
My Spidey sense is tingling [1]Note that this is an “opinion column” [2]Work with me on this: In response to COVID, the CDC and others are now recommending a room air change rate of 4 to 6 air… Read More
- BSI
Hanging cladding – hang on cladding, cladding hang on[1]..
Continuous exterior insulation is such an obvious thing to do….and we are finally getting serious about it…but we still seem to go out of… Read More
- BSI
Surface tension can cause all kinds of problems in buildings. Rainwater can flow around a surface as a result of surface tension (Figure 1). The traditional way of dealing with surface tension is to… Read More
- BSI
Thirty years ago I said the moldiest buildings in the United States were air-conditioned hotels with vinyl wall coverings that operate under a negative air pressure….they literally “sucked”…. Not… Read More
Pagination
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