ASTMD-226 30# Type II roofing felt - ASTMD-226 30#

ASTMD-226 30# Type II roofing felt, Restrict vapor movement from the wood deck attic to the underside - details see: https://www.buildingsupplieshub.com/astmd-226-30-type-ii-roofing-felt-10101340

Type: Roofing Felt	Place of Origin: China (Mainland)	Brand Name: Qing Shan	Model Number: ASTMD-226 30#
Specification: 36inch x 72feet	Tensile Strength: machine direction > 40LB Acorss machine direction>20LB

ASTMD-226 30# Type II roofing felt

A heavy-weight asphalt roofing felt made of a specially formulated organic sheet which has been fully saturated with waterproofing asphalt.

This is pre-conditioned to lay flat and remain stable during and after installation.

This underlayment asphalt felt is designed to be used as an all-purpose protective waterproof sheet in construction projects.

Can be installed as a temporary roof cover during house construction and then serve as a permanent shingle underlayment after shingles are installed.

As a shingle underlayment it functions to restrict vapor movement from the wood deck and attic to the underside of the shingles thus preventing condensation and as a barrier to wind-driven moisture which may get past the shingle.

Can also act as temporary protection if shingle blow-off occurs. May also be used as a waterproof breather sheet on side-walls beneath outer finish .