In addition small crushed stones are glued to the top of the surface giving the asphalt layer additional protection from the sun s uv rays.
Roofing covering examples.
Examples of a class a roof covering include concrete or clay roof tiles fiberglass asphalt composition shingles and metal roofs.
Look for installations that have been in place at least 10 years to see what the wear characteristics of that material are in your area says bollnow.
Shingles made with fiberglass are lightweight and resist tearing.
8 2 1rc roof covering requirements i.
Metal excels at sloughing off heavy snow and rain won t burn and resists high winds.
There are many kinds of asphalt shingles on the market including energy star certified products that may be eligible for a tax credit.
The roof wasn t maintained loose flashing or a cracked vent boot were found for example that allowed water through.
An example of an unrated covering is an untreated wood shake roof.
Fiberglass shingles start with a fiberglass mesh mat that is covered in asphalt and topped with granules that provide color and reflect some of the sunlight.
They are economical easy to install and easy to maintain.
Organic asphalt shingles begin with paper often recycled that is saturated in asphalt and covered with granules.
The roof wasn t installed properly so it is the roofer s fault.
Asphalt composite shingles are the most popular roofing material in north america.
The roofing material is faulty so it is the manufacturer s fault.
The irc addresses roof covering requirements in several areas.
This is the most common reason and the next reason is the second most used excuse.
The national roofing contractors association nrca suggests you look at full size samples of the synthetic product and the manufacturers brochures.
Fire resistance is covered in section r902 and insulation is addressed in section r906 but the majority of the requirements are presented in section r903 and r904 which address weather protection and materials respectively.
It consists of multiple layers of tarpaper rolled in asphalt and applied to the roof.
Examples of common class c building materials include untreated wood shakes and shingles plywood and particleboard.
If wood shakes and shingles are impregnated with fire retardant chemicals they meet the requirements for a class b fire rating and can meet a class a rating if additional materials are included in the roof assemblies.
The reason is simple.
Made from a fiberglass base topped with asphalt and mineral granules these three tab shingles are an all around good choice for most home roofing needs.
This is not a recommended roof covering.