Frequently Asked Questions

1. Why Choose an Underlayment?

2. What is MULTIPLY® underlayment?

3. Where can MULTIPLY® be used?

4. Can I use MULTIPLY® panels in a renovation?

5. How easy are the panels to install?

6. Are there any special Storage, Handling or Preparation details I need to know?

7. What type of fasteners do I need?

8. Does MULTIPLY® require a vapor barrier?

9. Can I install MULTIPLY® panels below grade?

10. Do I need to use a joint patching compound?

11. What type of sandpaper do I need?

Use a medium (80 grit) sandpaper to start and finish with a fine (100 to 120-grit) sandpaper. Sand all seams at a 45% angle and 12" in from all edges – until all green X’s within 12" of the seams have disappeared.
Do not over sand!