Building Science

Switzerland’s Sika would be interested in buying some parts of BASF’s construction chemicals business but has ruled out bidding for the whole business, Chief Executive Paul Schuler told Reuters.

Building this net-zero house relies on a strategy of energy conservation, including: blanketing the building with interior and exterior insulation and installing a continuous air-seal around the shell of the building which dramatically reduces the demands of heating and cooling.

From Siga headquarters in Switzerland, Matt Risinger explains the science of controlling both air and vapor in buildings. The elegance of this video comes, in part, from Matt's clear way of summarizing, and prioritizing, the control strategies available to builders.

Hunter Panels, in partnership with Covestro, is bringing time- and cost-saving technology to the residential construction market. Their first integrated residential wall construction advancement —PUReWall™—is a smart-solution for the skilled labor shortage. 

A labor cost effective option with certain products is to use continuous insulation as its own WRB, by taping all seams and overlapping the insulation boards over the flashing.

A few homeowners in Oklahoma's 'tornado alley' have invested in a form of home construction using concrete. Its poured into the center of Styrofoam walls to make a home that's very energy efficient.

One important data column from the benchmarking initiative is a building’s Energy Use Intensity (EUI)—the amount of annual energy consumption per square foot. EUI allows comparisons of energy performance across many different categories and sizes of buildings.

The owners of this mountain retreat elected to insulate the 2×6 stick-frame exterior wall cavities with 3 1/2 in. of closed-cell foam and wrap the outside of the exterior walls with 2-in. polyisocyanurate rigid insulation beneath a rain-screen system.

A combination of blown-in and spray-foam insulation at the roof and walls helped to achieve a supertight building envelope for this modest 1100-sq.-ft. modern ranch-style house with an attached one-car garage. 

Today CI is virtually required in commercial construction.  But residential walls, typically framed with wood, not steel, have less of an issue with thermal bridging.  So is the use of CI on these types of structures worth it?  Absolutely!