Low Slope Asphalt Shingle Roof

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Low slope asphalt shingle roof.

Asphalt shingles are an effective roof covering material for sloped roofs that can be successfully used on slopes as low as 2 12. When combined with the proper underlayment materials and application they are an excellent solution for a low slope roof with a pitch between 2 12 to 4 12. This top layer normally is tar over which the gravel is laid. Roof fast 95 base iko roof fast 95 base is a self adhesive product that can easily be cold applied on low slope roofs.

1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products. Low slope roofs present special challenges in terms of preventing unique types of damage. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Click to add item white membrane low slope roofing patch corner cover kit to the compare list.

A 3 per foot slope is considered low but may be acceptable if a double layer of felt is used. Because of the non absorbent nature of asphalt the shingles themselves provide an element of waterproofing which is why they work well for low slopes. Asphalt saturated felt along the eaves and lap succeeding courses by 19 inches as shown in figure 2 3. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

Made of several layers of bitumen surfaces built up roofing is finished by applying an aggregate layer or coating as the top layer. Asphalt shingles can be used on roofs with a slope of 2 12 to 4 12 if double coverage underlayment is used. Start with a 19 inch strip of 15 lb. Self adhesive flashing membrane under the shingles prevents leakage on low slope roofs.

Asphalt shingles can only be installed on roof slopes of 2 12 or greater. Some building codes allow as low as a 2 slope with asphalt shingles if additional steps are taken. Sbs modified asphalt 7 solvent based 3 steel 4 color finish. Guide to roofing underlayment installation on low slope roofs with asphalt shingles.

This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. Iko roof fast low slope roofing components are engineered and manufactured to meet those particular challenges. The usual slope for asphalt shingles is a 4 or greater rise for every horizontal foot of run. Then apply standard asphalt shingles over the membrane.

What is the minimum slope for an asphalt shingle roof. Asphalt shingles continue to be the most widely installed roof covering option in north america. Built up roofing is the most popular roofing material used on low sloped roofs. With respect to shingle application roof slopes from 2 12 to less than 4 12 18 5 are called low slope roofs while roof slopes of 4 12 or greater are called normal or standard slopes.

For a low slope residential roof there are two main options.