Replacing Entire Roof Shingles On Steep Slope

The actual cost will vary depending on whether it is a composite asphalt shingle roof or a fiber cement concrete composite shingle installation.

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. 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. 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 require a double underlayment application in accordance with section r905 2 7.

For slopes greater than 21 12 apply underlayment in the normal fashion. These shingles often cost 200 400 per square. However shingle sealing may be a problem particularly on shaded portions of the roof. If all of the following are true and your building codes permit it then consider roofing over instead of replacing.

Use felt nails to secure felt paper to the entire roof. Continue the process overlapping the paper about 5 inches as you go until the roof is completely covered. There is only a single layer of shingles already on your roof. Slopes of 4 12 and above can use standard asphalt roofing.

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. Secure the shingle to the roof deck with fasteners as recommended by the roofing manufacturer. 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. Pramote polyamate getty images.

The first sheet of felt paper should be secured in line with the bottom 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. Cut the paper with the razor knife at the end of the roof. 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. 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. In terms of installing the shingles your price quotes will be higher for any roof the contractor does not consider walkable. Architectural shingles are a different style of asphalt shingle that are thicker than a 3 tab shingle and layered for an upscale look.

Shingle coverage three tab shingles usually carry a 20 25 or 30 year warranty against manufacturing defects.