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DELTA«-FOXX 4'-11" X 164'----- 804 Square Feet

Delta Foxx roofing underlayment by Cosella Dorken, The most advanced moisture management roof underlayment on the market. Cutting edge technology allows for extreme vapor permeability.
2-ply material that is waterproof with a vapor permeable di

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Our Price: $649.00

Availability: Usually Ships in 2 to 3 Business Days
Product Code: DLFX

DELTA «FOXX is the most advanced moisture management roof underlayment on the market. Its cutting edge technology allows for extreme vapor permeability for even the harshest of climates. Manufactured by the industry-leading engineers at Cosella Dorken DELTA «FOXX roofing underlayment is both highly durable and easy to use.

Order your DELTA «FOXX roofing underlayment from our team at Spycor Building Products.


The 2-ply material has a vapor permeable dispersion layer on top of a highly tear-resistant special PET fabric to make it both extremely durable and water resistant.


This tough membrane has an extremely high water vapor permeability, which ensures excess moisture never seeps under the roof. A water-repellent dispersion coating makes DELTA«-FOXX permanently and reliably waterproof.


DELTA«-FOXX is very easy to handle and lay down. The lightweight rolls enable quick unrolling and precise alignment of edges. The smooth underside allows for DELTA «FOXX to be effortlessly pulled over rough surfaces. This highly scuff and tear-resistant membrane allows you to safely walk onto of it when laid on top of solid sheathing. This superior roofing membrane can be walked on in rain or shine.

Order your DELTA «FOXX roofing underlayment online from our trusted suppliers here at Spycor Building Products.

Evaluation Report and Building Code Approval

ICC ESR-2625

Technical Data

Water Vapor Transmission

ASTM E96-00 Proc. B

3763 g / sqm / 24 h

Permeance - ASTM E96-00 Proc. B

31,467ng / Pa / s / sqm

Perms - ASTM E96-00 Proc. B

550 grains /h /sqft /in Hg
Breaking Load - ASTM D5035-95 (2003)

MD: 103 lb/2 in.

(461 N / 50mm)

CD: 62 lb/2 in.

(278 N / 50mm)

Elongation at Break - ASTM D5035-95 (2003)

MD: 37%

CD: 48%

Tear Resistance - ASTM D1922-03a

MD: 1916 g

CD: 2564 g

Tearing Strength - ASTM D4533-2004

MD: 23 lb (103 N)

CD: 16 lb (71N)

Water Resistance: Impact Penetration

AATCC 42-2000

no water passing

Water Resistance: Hydrostatic

CAN/CGSB-4.2 No 26.3-95/ISO

104 cm

Fastener Pull-Through Force - ASTM D3462-03

211 N

Flame Spread - ASTM E84-09


NFPA Class A; UBC Class I

Smoke developed - ASTM E84-09


NFPA Class A; UBC Class I

Roll weight

apprx. 35 lb (16 kg)

Roll width

4.92 ft (1.5 m)

Roll length

164 ft (50 m)

Temperature range

-40 ░F to +176 ░F

(-40 ░C to +80 ░C)

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