Howe Lumber Company 555 Main Street East Brookfield, MA 01515 (508)885-5396 Monday -Friday 7:00am - 5:00pm Saturday 7:30am - 3:00pm
If you don't see the navigation bar to the left, then click the logo to make it appear.
Underlayment Plywood

Underlayment plywood is designed to be used as a subfloor. It uses an exterior grade of glue, and is not quite a finish grade of plywood, but it does have a few things that CDX does not.

The top layer of an underlayment plywood is sanded lightly, so that it has an even surface. There are no voids or gaps in the middle layers either, making it a stronger product and well suited for going beneath flooring.

Underlayment is also known by the name "PTS", which stands for Plugged, Touched, and Sanded. This describes the process underlayment goes through. In terms of grading, where CDX is rough on both sides, underlayment can be figured as a BC grading -- one side has been sanded somewhat, and the other remains rough.

To MainPage To Lumber Main Page to the Plywood Main Page Go to Definitions Page
For Web-related issues contact webmaster@howelumber.com
For Sales-related issues contact sales@howelumber.com
Click below to Return to Main Page

Howe Lumber Company 555 Main Street East Brookfield MA 01515 (508)885-5396 (508)867-3232 Monday - Friday 7:00am-5:00pm Saturday 7:30am - 3:00pm