Dimensions Guide

Choose the synthetic strength of ProArmor
®
Underlayment.
As a contractor, you know that a roof is only as strong as its weakest
component. So why would you risk your reputation on #15 organic
felt? Owens Corning
®
ProArmor
®
Synthetic Roof Underlayment
with Fusion Back Coating Technology
™
is strong, durable and
repels water unlike #15 felt. It’s also lighter, easier to install and
contributes to safe working conditions for your crew.
ProArmor
®
Underlayment outperforms conventional #15 organic felt —
the reason to switch is clear.
ProArmor
®
Underlayment
Conventional
#15 Organic Felt
Repels and sheds water
Absorbs water
Features slip-resistant
Fusion Back Coating Technology
™
None
Resists tearing when
walked on or in high winds
May tear during installation
which can cause leaks
42 in.
36 in.
2.3 lbs. per square
††
11.5 lbs. per square
9.29 squares per roll (with 3-in. overlap)
4.08 squares per roll (with 2-in. overlap)
10 squares per roll
4.32 square per roll
Can be left exposed for up to 30 days
†
Must be covered immediately
Clearly marked
None
10-Year Limited Warranty*
None
Performance Feature
Moisture resistance
Enhanced slip resistance
Enhanced tear resistance
Easy-to-install wide rolls
Lightweight
More coverage per roll
More material per roll
Longer UV exposure
Helpful fastening guides
Warranty coverage