Full Product Manual

Grace Construction Products
GRACE SYN 15
Synthetic Replacement for #15 Felt
Product Advantages vs. #15 Felt
Stronger
More slip resistant
Better Coverage per roll, greater productivity
Suitable for use under all major
roof coverings
10 Year Warranty
Grace SYN 15
synthetic underlayment exceeds the
requirements of ASTM D226 and offers the benets
of a synthetic to traditional #15 felt users. Its higher
coverage per roll means it goes down quickly. Because
it is 10x stronger than #15 felt, costly blow offs are
prevented. The product is mechanically fastened, and
may be used in conjunction with GRACE self adhered
underlayments, or alone.
It is totally recyclable, and contains post industrial
recycled polymers, so it contributes to sustainabiliy
and LEED.
Grace SYN 15
underlayment acts as a secondary
watershedding material below mechanically attached
roof coverings. The product may be exposed for up to
30 days, and may be used with asphalt shingles and
most other roof coverings.
Product Description
Grace SYN 15
underlayment is an engineered woven
fabric, coated on both sides with polypropylene. The
proprietary resin formula used in the walk and deckside
surfaces create a slip resistant surface.
Grace SYN 15
underlayment is available in 10 sq
rolls (48 in. wide x 250 ft long).
Features & Benets
Major benets of Grace SYN 15
underlayment vs
#15 felt include:
Stronger—Its 10x stronger and prevents blow offs
and tears in windy conditions
Higher Coverage per Roll—A 10 sq roll is 67%
lighter than #15 felt, and covers 2.3 times the area
Fewer Laps and Fasteners—30% more coverage per
side lap than felt
Sustainable—Grace SYN 15
underlayment is 100%
recyclable, and contains post industrial recycled mate-
rials, and contributes to sustainability and LEED
Excellent temporary dry in—May be exposed for up
to 30 days
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