Should vinyl siding be installed over furring strips?
Adding a layer or rigid foam insulation to the exterior of a conventionally insulated house can be a major step forward for energy conservation. The foam reduces thermal bridging, the loss of heat through wall framing, and means a significant boost in overall R-values. As a result, these wall assemblies are becoming more common.
More from greenbuildingadvisor.com
Builders typically add furring strips over the foam, then install the siding. The furring provides a sound base for the siding, and also creates an air space behind the siding, which aids drying.
Although a frequent question is how the furring strips should be attached to the house, Sonny Chatum has an entirely different question: Is this technique appropriate for vinyl siding?
Writing in a post at GreenBuildingAdvisor’s Q&A forum, Chatum wonders how the siding itself will hold up under those circumstances. Will the gaps between furring strips adversely affect the siding? On this issue, there seems to be no clear answer.
Although the Vinyl Siding Instittute seems to endorse the practice, Chatum gets conflicting advice from representatives of CertainTeed. Chatum is convinced he’s not the only person who’s faced this dilemma. He’s just not sure where to get the right answer.
Read the whole story in this month’s Q&A Spotlight.