Fan-Fold Foam Board Glens Falls NY

Fan-fold foam board in Glens Falls 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

Greenthumb Nursery & Country Store
(518)639-4500
5699 State Route 4
Fort Ann, NY
Western Slate Inc
(518)642-9538
33 Dekalb Rd
Granville, NY
Glens Falls Agway
(518)792-3377
Lake George Road
Queensbury, NY
Capital Stone Saratoga
(518)226-8677
4295 Route 50
Saratoga Springs, NY
L A Group Landscape Architecture and Engineerng PC
(518)587-8100
40 Long Alley
Saratoga Springs, NY
All in One Services
(518)761-9883
Saratoga Avenue South
Glens Falls, NY
Outlaw Farms
(518)642-0030
1320 Route 24
Granville, NY
High Peaks Tree Service
(518)668-9601
2895 Lake Shore Drive
Lake George, NY
Saratoga Masonry Supply
(518)587-6300
437 Maple Avenue
Saratoga Springs, NY
High Peaks Tree Service
(518)583-9604
Lake Shore Drive
Saratoga Springs, NY

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