CERTAINTEED WINTERGUARD SANDED 2 SQUARE 36 INCHX65FEET
Other products by Certainteed

CERTAINTEED WINTERGUARD SANDED 2 SQUARE 36 INCHX65FEET
Product# 88780100
Brand CERTAINTEED, Winterguard
Type Waterproofing, WINTERGUARD SAND
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There is also a wide selection among heavy duty underlayment products:

UNRATED HEAVY DUTY SHINGLE UNDERLAYMENT (#30).
These heavy duty products are built using a heavier weight of
organic felt; however, as mentioned above, unrated products are
subject to wide variation in saturation. Under-saturated underlay-
ments are subject to severe wrinkling. Under-saturated #30 under-
layment has been known to wrinkle even after shingles are
installed, telegraphing the wrinkles through the installed shingles
after the job is finished.

ASTM D4869 (TYPE II).
A more predictable quality of heavy
duty underlayment, much more resistant to wrinkling. Certai
nT
eed
RoofWrap 30 meets this standard.

ASTM D226 (NONPERFORATED).
This is a heavier felt normally
used in built-up roofing systems. These felts have a greater asphalt
content and exhibit superior strength and resistance to wrinkling.
Both RoofWrap 15 and 30 meet this standard.

SYNTHETIC UNDERLAYMENT.
There are a variety of these
underlayments made from different synthetic components,
all are light-weight and claim superior resistance to tearing and
wrinkling. Most of these type underlayments carry one or more
performance or approval ratings. Certai
nT
eed will not void or
reduce their Asphalt Shingle Warranty when their shingles are
installed over these types of “rated synthetic underlayments”
(i.e. meets one or more of the ASTM performance standards
above, or has one or more industry recognized code-body
approval).
• CertainTeed DiamondDeck
is a synthetic, scrim-reinforced,
water-resistant underlayment that can be used beneath shingle,
shake, metal or slate roofing. It has exceptional dimensional
stability compared to standard felt underlayment. DiamondDeck’s
special top surface treatment provides excellent slip resistance,
even when wet.