Minimum Roof Slope For Cedar Shingles

This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.

Minimum roof slope for cedar shingles.

Asphalt shingles continue to be the most widely installed roof covering option in north america. 18 43 asphalt shingles with special underlayment requirements 2 in 12. That works out to about nine degrees if that works better for you. Roofing material or system.

It is important for shingle roofs to function properly and one method of ensuring that this is achieved is to observe the pitch requirements for the shingles. Minimum required slope x in 12 minimum required slope degrees asphalt shingles. 9 46 built up roof asphalt. Asphalt shingles minimum roof slope roof pitch r905 2 2.

Minimum pitch for cedar roofs if you desire a cedar roof for your home the ideal pitch for your roof ranges from a five pitch to a 12 pitch. While a low pitch roof may not show the aesthetic qualities of cedar shingles to full advantage they provide a lightweight durable solution where a pitched roof is required. At these low pitches 14 22 degrees care must be taken and a water impermeable vapour permeable underlay must be used underneath with a ventilated space between the membrane and the shingles. Wood shingles are more susceptible to leaks than composite or asphalt shingles because they don t lock as tightly or lay as flat as traditional shingles.

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. The minimum roof pitch for shingles and shakes is 14 degrees. In 12 0 25 in 12 1 19 built up roof coal tar pitch.

At these pitches there is a possibility of some water penetration. What is the minimum pitch slope of an asphalt shingle roof. Page 23 cedar care maintenance overview a word about topical treatments for installed roofs topical treatment products power washing the beauty of cedar download pdf page 24 coverage and exposure tables shingle coverage table 1 shingle exposure table 2 shake coverage table 3 shake exposure table 4 download pdf. Minimum required roof slope for roofing materials.

The minimum requirement is 2 12. Over the membrane install vertical 2x4 battens lined up with the rafters then spaced sheathing as described below. Shingles of all types need to have a slope to function properly. On lower slopes shingles or shakes may be installed over a fully waterproof built up roof bur or membrane roof.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Asphalt shingles can only be installed on roof slopes of 2 12 or greater.