Replacing Entire Roof Shingles On Steep Slope

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.

Replacing entire roof shingles on steep slope.

If the shingles fail at any point during that time span expect a check for a prorated amount. However shingle sealing may be a problem particularly on shaded portions of the roof. 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. Continue the process overlapping the paper about 5 inches as you go until the roof is completely covered.

Shingle coverage three tab shingles usually carry a 20 25 or 30 year warranty against manufacturing defects. 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. In terms of installing the shingles your price quotes will be higher for any roof the contractor does not consider walkable.

For slopes greater than 21 12 apply underlayment in the normal fashion. Replacing an asphalt roof with new shingles will cost between 5 400 and 9 000 or an average of 7 211 for a 2 000 square foot home not including old roof removal. Pramote polyamate getty images. These shingles often cost 200 400 per square.

Cut the paper with the razor knife at the end of the roof. If all of the following are true and your building codes permit it then consider roofing over instead of replacing. The first sheet of felt paper should be secured in line with the bottom of the roof. Stone coated metal roofing or stone coated steel roofing has a deep architectural profile and can mimic the look of asphalt shingles wood shakes or clay tiles this premium roofing material comes with warranties up to 50 years and is rated highly for resistance to winds hail and fire.

Use felt nails to secure felt paper to the entire roof. Architectural shingles are a different style of asphalt shingle that are thicker than a 3 tab shingle and layered for an upscale look. 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. Asphalt shingles should not be installed on vertical walls but they can be used on steep slopes such as mansard style roofs.

The maximum slope considered suitable for normal shingle application is 45 degrees or 12 per foot. If a roof slope exceeds this limitation the shingles should be applied by the following recommended method complying with astm d4586. That may vary among roofing contractors but generally it will be right about 8 12. Secure the shingle to the roof deck with fasteners as recommended by the roofing manufacturer.

Architectural shingles are available in 30 or 50 year varieties.