Replacing Entire Roof Shingles On Steep Slope

However shingle sealing may be a problem particularly on shaded portions of the roof.

Replacing entire roof shingles on steep slope.

If all of the following are true and your building codes permit it then consider roofing over instead of replacing. If the shingles fail at any point during that time span expect a check for a prorated amount. The actual cost will vary depending on whether it is a composite asphalt shingle roof or a fiber cement concrete composite shingle installation. The maximum slope considered suitable for normal shingle application is 45 degrees or 12 per foot.

Architectural shingles are available in 30 or 50 year varieties. Laminated versions carry a lifetime warranty which means for as long as you own the house or for a maximum of 40 to 50 years. Roof slopes between 2 12 and 4 12 can use shingles but require roof application techniques to take into account a greater potential for ice dam water backup. The first sheet of felt paper should be secured in line with the bottom of the roof.

Use felt nails to secure felt paper to the entire roof. Most building codes permit two layers of asphalt shingles on roofs with a 4 12 slope or less while some allow three layers on steeper roofs. Secure the shingle to the roof deck with fasteners as recommended by the roofing manufacturer. These shingles often cost 200 400 per square.

Continue the process overlapping the paper about 5 inches as you go until the roof is completely covered. For slopes greater than 21 12 apply underlayment in the normal fashion. Pramote polyamate getty images. There is only a single layer of shingles already on your roof.

Cut the paper with the razor knife at the end of the roof. Roof slopes between 2 12 and 4 12 require a double underlayment application in accordance with section r905 2 7. Slopes of 4 12 and above can use standard asphalt roofing. That may vary among roofing contractors but generally it will be right about 8 12.

If a roof slope exceeds this limitation the shingles should be applied by the following recommended method complying with astm d4586. Shingle coverage three tab shingles usually carry a 20 25 or 30 year warranty against manufacturing defects. If you re planning to replace shingles on an existing roof there s nothing cost effective you can do to change the slope of the roof. Asphalt shingles should not be installed on vertical walls but they can be used on steep slopes such as mansard style roofs.

Architectural shingles are a different style of asphalt shingle that are thicker than a 3 tab shingle and layered for an upscale look.