Shingles can be installed on low-sloped roofs with a pitch of 3/12 inches. However, it will require additional layers under the shingles, such as a double layer of asphalt-saturated felt paper or a single layer of ice and water shield.
What is the difference between architectural shingles and 3-tab shingles?
3-tab shingles are flat, and they have a single tab shape and size. … Architectural shingles are also referred to as dimensional shingles. This is because they provide a more dimensional look to the roof. Each shingle appears more dimensional because it is; multiple layers of materials adhere to the base.
What is the minimum roof pitch for architectural shingles?
Shingles of all types need to have a slope to function properly. The minimum requirement is 2/12. The 2/12 number is rise over run or two units of vertical for every 12 units horizontal. That works out to about nine degrees if that works better for you.
Can you use architectural shingles on a 3/12 pitch roof?
Asphalt shingle manufacturers will warrant shingles installed on roof slopes as low as 2/12 when these special installation procedures are followed. … The National Roofing Contractors Association recommends that asphalt shingles be installed only on roofs with slopes that are 3/12 and greater.
Can you put architectural shingles?
The quick answer is yes you can re-roof architectural shingles over existing architectural shingles (however you must check with the shingle manufacturer as well). Having said that it will be nearly impossible to get a good looking quality installation.
Can you mix 3 tab shingles with architectural shingles?
If you’ve already got 3-tab shingles, you might be able to overlay with architectural ones while leaving them in place. This will cost less, as you won’t have to tear off and start again.
Are architectural shingles more expensive than 3 tab shingles?
Three-tab shingles cost an average of $25 to $30 per bundle. On the surface, the architectural shingles are 40 to 50 percent more expensive.
Is a 3/12 roof pitch good?
Any roofs up to 3:12 are generally considered “low slope.” In the residential arena, we see lower slope roofs as part of the home’s architectural design. … Then, when you get into roofs of 3:12 or greater pitch, most other metal roofs can be used and that generally is the pitch requirement for asphalt shingles as well.
What type of roofing is best for a low pitch roof?
Metal roofing systems are popular because of their longevity and durability. Rubber roofs are a top choice for flat or low pitched roofing as it adheres to the roofing materials below it and, when installed correctly, provides a watertight seal to the elements.
Can you Shingle A 2 12 pitch roof?
While roofs with a 4/12 pitch and steeper are ideal, the minimum roof pitch for shingles is 2/12. A roof with a 2/12 pitch can safely use shingles by incorporating additional layers of underlayment around the eaves.
What is the minimum underlayment for asphalt shingles?
for asphalt shingles, NRCA recommends a single layer of no. 15 asphalt-saturated underlayment be used with roofs having slopes of 4:12 (18 degrees) or greater. for roof slopes between 3:12 (14 degrees) to 4:12 (18 degrees), NRCA recommends a minimum of two layers of no. 15 underlayment.
What angle is 3/12 pitch?
A 3/12 roof pitch angle is about 14°, so on and so forth. 4/12 is quite typical. Anything under 3/12 is a low pitch roof. Anything above 6/12 is a steep roof pitch since it becomes harder to walk on the roof.
What slope is considered a flat roof?
A flat roof is generally any roof with a pitch of 1-10 degrees. That means flat roofs aren’t actually flat. It may look horizontal but often has a minimum slope of 1/4 inch per foot. This allows water to run off the roof to prevent damage.
Are architectural shingles harder to install?
Since an architectural shingle roof is easier to install, is more durable and comes with a better warranty, its lifespan cost is, in many instances, actually less than that of a more basic 3-tab roof.
What is the advantage of architectural shingles?
Architectural shingles put less stress on you roof because although they are heavier they don’t need the extra support that traditional asphalt shingles do. They are also easier than other roofing materials to cut and fit into all areas of your roof, making installation easier and less costly.