Can I use asphalt shingles on a low pitch roof?

Never apply asphalt shingles to roof slopes less than 2:12. Once an ice and water protector product is laid down over the entire low sloped area, the shingles can be applied according to their normal application procedures.

What pitch is too low for shingles?

As well, a slope of 4:12 is most commonly considered the lowest slope for “standard shingle installations”. Most manufacturer and industry recommendations require, or at the very least recommend, special underlayment or other considerations on roofs between 2:12 and 4:12.

What kind of shingles to use on a low slope roof?

The ARMA’s Residential Manual for Asphalt Roofing recommends that asphalt shingles on low-slope roofs be applied over a nonperforated single layer of adhesive-backed bituminous membrane installed to the manufacturer’s specifications, or over a double layer of asphalt-impregnated felt paper.

How big of a slope do you need for a low slope roof?

Well, the answer is, “It depends.” If there were one best roof for every application, we would have figured it out by now. Even standard asphalt roofing shingles can be used on roofs as low-sloped as 2.5-in-12, as long as the underlayment is installed in a double-coverage configuration.

What should I use to underlay asphalt shingles?

Use “tin caps” under staples, if the roof may be exposed to wind before shingles are to be applied. Use sticky back ice and water shield as underlayment where ice dams or leaf and twig dams are likely to build up, and at valleys and where the roof ends at a wall (wide metal flashing may also be used there).

How big of a pitch can asphalt shingles be applied to a roof?

A: Former senior editor Roe A. Osborn replies: According to the Asphalt Roofing Manufacturers Association (301-348-2002), asphalt shingles can be applied to a roof with a pitch as shallow as 2-in-12.

Can you use asphalt shingles on a low slope roof?

Some building codes allow as low as a 2” slope with asphalt shingles if additional steps are taken. For anything less than that, you should use a roofing material specifically made for low slope roofs. has already been used to log in to Gleam.

A: Former senior editor Roe A. Osborn replies: According to the Asphalt Roofing Manufacturers Association (301-348-2002), asphalt shingles can be applied to a roof with a pitch as shallow as 2-in-12.

What are the different types of asphalt shingles?

As well as protecting the roof, new shingles offer energy efficiency and cooling performance. There are two main categories of asphalt shingles: organic and fibreglass. These are the oldest type of asphalt roofing tiles. They consist of a cellular fibre substrate (recycled paper) impregnated with asphalt and compressed under high pressure.

What is the SI rating for asphalt shingles?

Asphalt shingle packaging shall bear a label to indicate compliance with ASTM D3161 and the required classification in Table 1504.1.1. CLASSIFICATION OF STEEP SLOPE ROOF SHINGLES TESTED IN ACCORDANCE WITH ASTM D316 OR D71581 For SI: 1 foot = 304.8 mm; 1 mph = 0.447 m/s. a.