Building Science

GBA Radio  - Podcast: Building Science Fundamentals

How Air Affects a House (1) - Building Science Podcast

Posted on June 26, 2009 by John Straube

This podcast series is excerpted from a two-day class called "Building Science Fundamentals" taught by Dr. Joe Lstiburek and Dr. John Straube, of Building Science Corporation.

GBA Radio  - Podcast: Building Science Fundamentals

Insulation Retrofits on Old Masonry Buildings - Building Science Podcast

Posted on June 15, 2009 by Joe Lstiburek

This podcast series is excerpted from a two-day class called "Building Science Fundamentals" taught by Dr. Joe Lstiburek and Dr. John Straube, of Building Science Corporation.

GBA Radio  - Podcast: Building Science Fundamentals

Rain Control in Energy Efficient Buildings - Building Science Podcast

Posted on May 20, 2009 by Joe Lstiburek

This podcast series is excerpted from a two-day class called "Building Science Fundamentals" taught by Dr. Joe Lstiburek and Dr. John Straube, both of Building Science Corporation.

3D

How to Use Climate Consultant 4

Posted on May 8, 2009 by Peter Yost

For over 2,000 locations across the country, there are hourly weather data files packed with temperature, humidity, and wind information that can be used to better match home designs to the conditions they will face. But to say that all this information is dense and overwhelming is a bit of an understatement.

GBA Radio  - Podcast: Building Science Fundamentals

The Perfect Wall, Roof, and Slab — Building Science Podcast

Posted on May 6, 2009 by Joe Lstiburek

This podcast series is excerpted from a two-day class called Building Science Fundamentals with Drs. Joe Lstiburek and John Straube of Building Science Corporation. For information on attending a live class, go to BuildingScienceseminars.com This week Dr. Joe talks about enclosure design principles of energy efficient buildings

Tear at the fastener

Beyond Water Resistance

Posted on April 23, 2009 by Peter Yost

Housewraps and Building PaperTypically referring to Grade D building paper, this product is an asphalt-impregnated kraft paper that looks a lot like a lightweight asphalt felt. The Grade D designation has come to mean that the building paper passes ASTM D779 (minimum 10-minute rating with the “boat test”) and different products are called out as “30-minute” or even “60-minute” based on D779 results. At times confused with roofing felt, roofing felts and building paper differ in two ways: felts are made of recycled-content paper, building papers of virgin paper; felts are made of a heavier stock paper; building papers a lighter stock. See also roofing felt.: Beyond Water Resistance

Tensile strength, vapor permeability, and pliability are important, too.

In a recent blog post, I covered water-resistive barrierSometimes also called the weather-resistive barrier, this layer of any wall assembly is the material interior to the wall cladding that forms a secondary drainage plane for liquid water that makes it past the cladding. This layer can be building paper, housewrap, or even a fluid-applied material. (WRB) tests to separate the wheat from the chaff in terms of water resistance. But a good WRB has other properties as well.

Rotten sill

Don’t Let This Happen to You

Posted on April 12, 2009 by Michael Maines

Door design details
The photo at right is from an entry that's just 15 years old. Fortunately, it was able to be repaired. I haven’t always been so lucky. Let’s just say that replacing subfloor and framing is no fun. A safe assumption is that, for one reason or another, doors always leak. They shouldn’t, but they do. Seals wear out. Wind blows. Jambs rot. Sills crack. Weepholes clog. Following are some ways to mitigate the chance of damage.

    Modified boat test

    Simple DIY Tests for Housewraps

    Posted on April 10, 2009 by Peter Yost

    How do you know if your housewrap really works?

    In the good old days, we weatherlapped 3-ft. courses of building paperTypically referring to Grade D building paper, this product is an asphalt-impregnated kraft paper that looks a lot like a lightweight asphalt felt. The Grade D designation has come to mean that the building paper passes ASTM D779 (minimum 10-minute rating with the “boat test”) and different products are called out as “30-minute” or even “60-minute” based on D779 results. At times confused with roofing felt, roofing felts and building paper differ in two ways: felts are made of recycled-content paper, building papers of virgin paper; felts are made of a heavier stock paper; building papers a lighter stock. See also roofing felt. underneath our wall claddings, and that seemed to work just fine. But then along came all sorts of snazzy “gift wrappings” (a.k.a. housewraps) in handy, 9-ft. rolls. Some claimed to be both air barriers as well as water-resistive barriers; others claimed to be vapor permeable. Along the way, it got pretty confusing about just exactly what the housewrap’s job is in our walls. (For a practical and detailed perspective on housewraps, see “Making Sense of Housewrap”.)

    Climate Smart

    Reducing Our Carbon Footprint — Part Two

    Posted on April 6, 2009 by Annette Stelmack

    Boulder County’s Climate Smart loan program

    Part Two: A deeper level of action
    The first major step toward reducing your carbon footprintAmount of carbon dioxide and other greenhouse gases that a person, community, industry, or other entity contributes to the atmosphere through energy use, transportation, and other means. is understanding how much energy you use. Energy efficiency is often more cost effective than renewable-energy alternatives. The target is to use less energy for the same amount of heating, cooling, lighting, and of course, powering appliances, the stereo, televisions, and iPods. Fortunately, a big benefit of most energy-efficiency measures is creating greater comfort in the home over the long term.

    HVAC

    Can’t We All Just Get Along?

    Posted on April 3, 2009 by Rob Moody

    I’ve been absent from the blog for about a week. My apologies. I was traveling and studying for the LEEDLeadership in Energy and Environmental Design. LEED for Homes is the residential green building program from the United States Green Building Council (USGBC). While this program is primarily designed for and applicable to new home projects, major gut rehabs can qualify. AP exam, which I took on Monday this week and passed. I have since been recovering. I’m glad it’s over, and I am looking forward to enrolling in the LEED AP+ program when it comes out later this year. The test was pretty much what I had expected, and I’m definitely glad that I studied.

    Register for a free account and join the conversation


    Get a free account and join the conversation!
    Become a GBA PRO!

    Syndicate content