Weather Exposure Roofing

The core material in an asphalt roofing shingle manufactured from glass fibers.

Weather exposure roofing.

A five bundles will cover 100 sq. Shingle exposures for wood roofs. C maximum recommended weather exposure for two ply roof construction. B maximum recommended weather exposure for 3 ply roof construction.

Fibrous material saturated with asphalt and used as an underlayment or sheathing paper. That portion of the roofing exposed to the weather after installation. Wood roof shingle exposure specifications. Allowable shingle exposure may also vary by the shingle grade something that you might infer by visual inspection of the shingles matching.

See figure a felt. Residential and commercial roofing shingles slate roof ventilation roof underlayments asphaltic and tpo roof membranes. The maximum weather exposure for wood shakes or wood shingles depends on the shingle size and the slope or pitch of the roof. Exposure 1 rated plywood commonly called cdx in the trade is sometimes mistaken as an exterior rated sheathing and erroneously used in applications for which it does not possess the required resistance to weather.

We measure shingle exposure as the distance from the lower edge of an exposed roof shingle or shingle tab down slope to the lower edge of the shingle in the. Nails are exposed to the weather. B maximum recommended weather exposure for 3 ply roof construction. C maximum recommended weather exposure for 2 ply roof construction.

Of roof area when used as starter finish course at 10 exposure. E maximum recommended weather exposure. The classifications are based on material composition as well as the durability of the adhesives utilized in the manufacturing process. By creating a barrier at the most vulnerable areas of your roof at the eaves and rakes in valleys around chimneys etc weatherwatch leak barrier will help prevent leaks due to water backing up in your gutters wind driven rain and in the north damaging ice dams.

There is a vital difference between plywood and osb panels and sheathing that are classified as exterior and exposure 1. Nesting is a technique where a roofing professional applies the top edge of the new shingle at the bottom edge of the old shingle. If the existing roof s shingle exposure matches the new shingles the new shingles are sometimes nested onto the roof. Coverage is based on 12 12 pack 5 bundle square at 7 1 2 exposure.

D all coverage based on an average spacing between shakes. Cdx should only be used for applications as outlined under exposure 1 above. Utilizing the wrong panels or sheathing could compromise the structure which is exposed to weather. Roofing shingles and materials plus factory certified roofers including ratings from real homeowners from north america s largest roofing manufacturer.