ASTM D-4869 15 Asphalt Saturated Organic Roofing Felt Paper Roofing Underlay

ASTM D-4869 15 Asphalt Saturated Organic Roofing Felt Paper Roofing Underlay

Asphalt roofing felt is based on the paper base which could soaked in low-softening petroleum asphalt. In North America it has more than 150 years of history till now, it is proved that the durability of the raw material is more than 30 years. This product is specialized in waterproof materials, packing, buliding damp proofing.

Data Sheet:

Usage

Asphalt roofing paper is an essential layer in the roofing process as it acts as extra protection from the elements. Felt roofing underlayment is asphalt saturated and are manufactured with a high-grade organic mat. #15 Specification Felt is a specification grade felt roofing underlayment used between the roof deck and the shingles.

Characteristics

1.Lays flatter - heavy-duty design minimizes the wrinkling that can occur with cheaper felts

2.excellent standard packaging

3.highly visible alignment lines

4.Better protection - superior asphalt saturation means improved waterproofing

5.Tightly Wound Rolls – Less Telescoping

A heavy-weight asphalt roofing felt made of a specially formulated organic sheet which has been fully saturated with waterproofing asphalt.Asphalt saturated organic felts are designed as an underlayment product to be applied over the roof  deck prior to the installation of asphalt shingles. Install asphalt saturated organic felts as a secondary  barrier to moisture caused by wind driven rain and ice damming

Installation:

Use saturated felt to provide a smooth surface on which to nail shingles and as temporary waterproofing in case of rain. A layer of felt must be applied to a wood deck to provide a vapor retarder between the wood deck and the asphalt fiberglass shingles. Without the felt layer, the wood planking or plywood deck - dried by heated temperatures found in most attics - will draw moisture (including tar and oils from the asphalt) from the shingles. The result will be shingles that are prematurely worn, cracked, brittle, as well as stuck to the wood surface when you attempt to remove them.

Beginning at a bottom corner of the roof, lay felt courses horizontally. Carefully cut off the binding - but don´t cut into the roll - and unravel 2 or 3 feet of the roll. Position the roll of felt so that it can be rolled across the bottom of the roof, even with the eaves. Kneel and hold the roll in both hands. Maneuver the felt into position so that it covers the deck right up to the edge of the rake and eaves but not over the sides of the building.