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Posted by Admin

From: David Hoover I am looking to have the attic of my house insulated. The builder in 1999 put fiberglass batts between the 2×4 that form the floor of the attic. Then blown in Johns Manville fiberglass with an R-value of 11 was put over the batts. I live in a Chicago suburb. I am . . . . read more >>

Posted by Admin

Ensuring good indoor air quality (IAQ) in buildings is an important task for facility managers today, due to the significant impact it has on the sustainability of a building, as well as the health of its occupants.  Based on research done over the years, several national public health and environmental organizations, such as the U.S. . . . . read more >>

Posted by Admin

When I introduce the concept of a blown in wall with fiberglass blowing wool, I often get push back from customers and installers who think they are going to be blowing a product that is similar to batt fiberglass. I explain that the new blowing wools are made of a different fiber and are designed . . . . read more >>

Posted by Admin

An ongoing disagreement between insulation contractors in Maryland involves whether or not party walls/demising walls should be considered a part of the exterior building envelope in townhome construction during the air seal/draft stop phase. The argument comes at a crucial time, as it pertains to the blower door testing required by the 2012 IECC Residential . . . . read more >>

Posted by Admin

Straight gable roofs are easy to vent, and ideally would be vented.  But often we end up with dormers, valleys and other complications. In this post we feature Alex Wilson’s house rebuild in Vermont to explain how smart vapor retarders like ProClima’s DB+ or INTELLO can keep your sheathing dry, while also allowing it to dry inward in the summer. . . . . read more >>

Posted by Admin

A Complete Approach Whether you are an architect, builder, contractor, distributor or code official, you are being bombarded by countless challenges in the buildings you are helping to create.  It is your responsibility to minimize problems (e.g. mold, mildew, etc.) and increase value (i.e. energy efficiency) for your customers and you are being held liable . . . . read more >>

Posted by Admin

What percentage of insulation manufacturers are developing product life cycle assessments (LCAs) and using them to provide purchasers with the info they seek?  I ask in that Sphere E is interested in including their LCAs in our sustainable purchasing database at no cost.  I would appreciate hearing how best to connect with insulation manufacturers interested . . . . read more >>

Posted by Admin

For concrete basements, should a vapor barrier be installed on the warm side of the wall if an R21 Fiberglass Batt is installed against the concrete?  The concern is that the concrete could contain moisture and become trapped in the wall if a vapor barrier is used.  Vapor barrier may be WMPVR, VRR, Flame Spread . . . . read more >>

Posted by Admin

If an R-19 fiberglass batt (6 1/4″ thick) is installed in a 2×6 steel stud, what is the ending R-Value, assuming a Grade 1 install? It is commonly known that the use of steel studs on exterior walls has a much higher impact of the whole wall R-Value as heat conducts through them at a . . . . read more >>

Posted by Admin

From: John Burbery How do you stop static when blowing fiberglass? . . . . read more >>