Fan-Fold Foam Board Cortlandt Manor NY

Fan-fold foam board in Cortlandt Manor is widely marketed as an easy fix for improving the thermal performance and water resistance of walls when re-siding. But if not applied properly, this option could lead to moisture problems, according to leading building-science experts.

Local Companies

Troys Garden Nurseries
(914)234-3400
Greenwich Road
Bedford, NY
Damiano Charles
(845)268-2470
59 Beechwood Drive
Congers, NY
Darrigo Landscape Supplies
(845)564-1733
84 Lakeside Road
Newburgh, NY
McKinney Landscaping Corporation
(914)528-3938
20 Austin Road
Putnam Valley, NY
Sommavilla J Lawn Irrigation Inc
(914)769-7880
14 Saxon Drive
Valhalla, NY
Franzoso Contracting
33 Croton Point Ave.
Croton-on-Hudson, NY
Hawthorne Brothers Tree Service Inc
(203)531-1831
5 Center Street
Bedford Hills, NY
Pat Scanlan Landscaping
(845)634-0508
14 Plains Drive
New City, NY
Slaker John P Design Group
(914)277-5033
509 Route 22
Purdys, NY
Winks
(845)369-7871
331 Spook Rock Road
Suffern, NY
Data Provided by:
  

Provided By:

Source: REMODELING Magazine
Publication date: September 1, 2005

By Clayton DeKorne

Best practice calls for stripping off existing siding, then installing a good weather barrier.

Fan-fold foam board is widely marketed as an easy fix for improving the thermal performance and water resistance of walls when re-siding. But if not applied properly, this option could lead to moisture problems, according to leading building-science experts.

At about ¼-inch-thick, fan-fold foam board adds only R-1 to R-1.5 to the wall system, a negligible insulation improvement. Foil-faced products promise higher R-values, but only when installed with a minimum ¾-inch air space in front of them, an option that requires siding over strapping. According to foam board manufacturers, the advantage of fan-fold is really that the board provides a consistent surface over the old siding, eliminating cracks and crevices that lead to energy-robbing drafts. All manufacturers recommend taping the foam to help stop air leaks and prevent water that gets through the siding from leaking behind the foam.

Photo: Courtesy THE JOURNAL OF LIGHT CONSTRUCTION
Certainly, the foam board provides a smooth working surface for installing new siding, but whether there is a significant improvement in thermal performance is hotly debated. “The danger is that you are putting an impermeable layer over the wall,” explains Steve Easley, a building consultant who specializes in helping building.

Click here to read full article from Replacement Contractor