*
Does anyone out there have any experience with an expanding foam product called POLYMASTER. It is a product advertised for use in masonry cavities as an insulator/soundproofer. I was directed to an installer by a company that provides polyurethane foam when we determined that the expanding nature of their product would not allow for a retrofit into my existing closed stud cavities. I was considering blown cellulose, but the installer agrees that the polymaster can be shot through holes drilled into the top plates accessed through the attic, reducing the need for interior wall holes. My concerns are: 1) Will product deliver advertised R- value of 4.6/inch? 2)Can it get wet? 3)Is it better than blown cellulose? Has anyone out there had experience with this product? BUILDER BEAVER
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story

Get expert guidance on finding a fixer-upper that's worth the effort.
Featured Video
Video: Build a Fireplace, Brick by BrickHighlights
Fine Homebuilding Magazine
- Home Group
- Antique Trader
- Arts & Crafts Homes
- Bank Note Reporter
- Cabin Life
- Cuisine at Home
- Fine Gardening
- Fine Woodworking
- Green Building Advisor
- Garden Gate
- Horticulture
- Keep Craft Alive
- Log Home Living
- Military Trader/Vehicles
- Numismatic News
- Numismaster
- Old Cars Weekly
- Old House Journal
- Period Homes
- Popular Woodworking
- Script
- ShopNotes
- Sports Collectors Digest
- Threads
- Timber Home Living
- Traditional Building
- Woodsmith
- World Coin News
- Writer's Digest
Replies
*
Does anyone out there have any experience with an expanding foam product called POLYMASTER. It is a product advertised for use in masonry cavities as an insulator/soundproofer. I was directed to an installer by a company that provides polyurethane foam when we determined that the expanding nature of their product would not allow for a retrofit into my existing closed stud cavities. I was considering blown cellulose, but the installer agrees that the polymaster can be shot through holes drilled into the top plates accessed through the attic, reducing the need for interior wall holes. My concerns are: 1) Will product deliver advertised R- value of 4.6/inch? 2)Can it get wet? 3)Is it better than blown cellulose? Has anyone out there had experience with this product? BUILDER BEAVER