Having said that it will be nearly impossible to get a good looking quality installation.
Reroofing architectural shingles at top of roof.
We discuss the nesting method which helps minimize an uneven appear.
If the structure can support the added weight a typical 20 square 2 000 square foot reroof will cost at least 1 000 less than a tear off job.
Architectural shingles will typically cost you 50 to 100 more per square to install than the basic 3 tab 25 year shingles.
The difference in price is actually greater than the difference in the cost of materials between the 3 tab and 30 year architectural shingles.
In this video we provide details on how to install roof shingles over existing shingles.
Many roofers recommend using laminated or dimensional shingles for re roofs because they re thicker than standard shingles and often have a staggered edge profile for looks that helps hide any dips or high spots in the old roofing.
They usually come in two variants the 3 tab shingles and architectural or dimensional shingles.
Advantages of reroofing most building codes allow two layers of organic or fiberglass asphalt shingles on roofs with a 4 12 pitch or less and three layers on steeper roofs.
Asphalt shingles are easy to install last anywhere from 10 to 50 years depending on the type and are less expensive than other roofing materials such as slate tile and metal.
Re roofing over architectural shingles infographic asphalt shingles are one of the most popular choices of roofing materials in the highly competitive residential roofing market filled with various options.
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.
Once you have installed shingles just past a plumbing vent install the flashing piece so it will lie on top of roofing at its bottom but be covered with roofing at its top.
Depending on the width of the pipe you may need to tear away a segment or two of the rubber boot.