Waterproof Damp Roofing Felt Roll Under Shingles 36 Inch*144 Ftmjm Size

0.4mm 15# Damp Roof Waterproof Roofing Felt Roll Building Construction Material

0.2mm damp roof waterproof roofing felt roll building construction material  is a widely accepted underlayment product that is manufactured from organic felt and is saturated with asphalt.

Usage:

is an underlayment that is applied over the roofing deck before installation of asphalt shingles. This is recommended for use with 20 and 25 year asphalt shingles.

Physical Requirements

ASTM D 4869 Type 1

• Width of Roll = 36”
• Roof coverage per Roll = 432 sq ft
• Mass of Saturated felt roll = 8.0 lbs/ 100 ft sq
• Mass of Asphalt Saturant = 4.0 lbs / 100 ft sq
• Mass of desaturated felt = 4.0 lbs / 100 ft sq
• Saturation by weight (min) = 100%
• Saturation efficiency (min) by weight = 75%
• Breaking Strength at 77F (min)
• Machine direction = 30 lbf/in
• Cross Direction = 15 lbf/in
• Pass 4 hour liquid Transmission water test YES
• Pliability at 77F when bend 90 degrees = ½” radius
• Pallet Size 1.1m*1.1m
• No. of Rolls per Pallet= 52 rolls.

Used

ASTM 4869 roofing felt is an underlayment that is applied over the roofing deck before installation of asphalt shingles. This is recommended for use with 20 and 25 year asphalt shingles.

Characteristics

Average roll weight,kg/roll:15kg

width:0.92m

Roll sqm:40sqm

Roll per pallet::52

Pallent size:1.1m*1.1m

Application:

1.Organic Felt rolls must be installed horizontally, from the bottom of the roof deck.

2.The first layer of Felt rolls must be installed to cover the entire bottom edge of the roof deck to facilitate the water shedding ability of the Felt.

3.Install fasteners at least eight inches at the top and middle edges and at the eave along the deck.

4.At slopes 4:12 and greater, a single layer of Felt rolls shall be installed parallel to and starting at the eaves, over lapped at least two inches, and fastened sufficiently to hold in place.

5.The top of each subsequent course should be fastened intermittently to hold the edge in place until the next course is applied. Make certain to secure the fasteners at the bottom of the next course to hold the top of the previous course