Secure the shingle to the roof deck with fasteners as recommended by the roofing manufacturer.
Replacing entire roof shingles on steep slope.
Roof slopes between 2 12 and 4 12 require a double underlayment application in accordance with section r905 2 7.
If a roof slope exceeds this limitation the shingles should be applied by the following recommended method complying with astm d4586.
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.
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 can use shingles but require roof application techniques to take into account a greater potential for ice dam water backup.
Slopes of 4 12 and above can use standard asphalt roofing.
The first sheet of felt paper should be secured in line with the bottom of the roof.
For slopes greater than 21 12 apply underlayment in the normal fashion.
There is only a single layer of shingles already on your roof.
The actual cost will vary depending on whether it is a composite asphalt shingle roof or a fiber cement concrete composite shingle installation.
Asphalt shingles should not be installed on vertical walls but they can be used on steep slopes such as mansard style roofs.
These shingles often cost 200 400 per square.
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.
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.
Use felt nails to secure felt paper to the entire roof.
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.
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.
If all of the following are true and your building codes permit it then consider roofing over instead of replacing.
That may vary among roofing contractors but generally it will be right about 8 12.
Continue the process overlapping the paper about 5 inches as you go until the roof is completely covered.
If the shingles fail at any point during that time span expect a check for a prorated amount.
Cut the paper with the razor knife at the end of the roof.
In terms of installing the shingles your price quotes will be higher for any roof the contractor does not consider walkable.
