This Standard covers three types of asphalt-coated glass-base sheets (asphalt-impregnated and -coated glass-roll roofing) surfaced with insoluble inorganic mineral matter:
(a) Type I: a lightweight base sheet intended primarily for use as an underlayment for shingles.
(b) Type II: a standard-weight roofing base sheet intended for use as the first ply in a roofing membrane over insulation.
(c) Type III: a venting base sheet surfaced with fine mineral matter on top and mineral granules on the bottom. This type is used in built-up roofing systems as a first ply to relieve pressure through lateral vapour movement.
Type III felt can be unperforated or, if used for spot mopping, contain perforations of a size specified in Table 1.
| File Size : | 1
file
, 670 KB |
| Note : | This product is unavailable in Russia, Ukraine, Belarus |
| Number of Pages : | 29 |
| Product Code(s) : | 2417265, 2417313, 2417265 |
| Published : | 02/01/2006 |
