Solid Hardwood, Engineered and Laminate Flooring - overlapping underlayment

Doityourself.com community forum was created to provide answers to all questions related to home improvement and home repair. Doityourself community can help you find information about how-to topics on small fixes to large remodeling projects. With comprehensive how-to content and expertly moderated community forums DoItYourself.com makes it easy to tackle even the most complex home improvement projects.



PDA

View Full Version : overlapping underlayment

CWCustom
08-26-07, 03:44 PM
I am using a #30 underlayment over my plywood subfloor, do I overlap this underlayment?

Emmett
08-26-07, 04:14 PM
From what I have read here you should overlap about 4 inches, or to build up to match tile or another transition; a series of 4 inch overlaps to the needed height.

But I am the question just below yours, so I wouldn't take this as gospel until a moderator wades in.

Emmett
Carpets Done Wright
08-27-07, 08:12 AM
If it is prefinished wood, the overlap will show in the finished surface!!!!!

If your crawl space or basement is under control for moisture, and you have the required 6-mil minimum moisture barrier installed in the crawlspace, or the basement dehumidified, I would butt the sheets of 30# At the seams, Trowel some asphalt mastic, under the tar paper.

Sand and finish, over lap and you will be sanding the humpidy bump out.

Carpets Done Wright
08-27-07, 08:14 AM
30# asphalt impregnated felt, IS NOT a moisture barrier!!!! It is only a moisture retarder.