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Classifications of steep Slope Roof coverings. Although asphalt shingle is the most common and generally least expensive roofing material, residential roofs can also be made of:


A Shingle roof is a roof that’s covered with a kind of substance called shingles. Among the components or components that arranges such a roof into its own class is functionality and the shape of the shingles. Shingles are rectangular and usually flat and they’re used from underside or the base of the roof upwards. As they’re applied segment or the preceding sheet of shingles is overlapped. This procedure of overlapping continues until the whole roof has been covered from base to top. Steep-Slope roof systems generally are composed of parts or individual sections installed in shingle style.

Advantages of Shingles:

• Quite long-lasting

• Available in wide assortment of designs and colours

• Powerful merchandise guarantees accessible

• Low maintenance cost

Steep-slope roof assemblies generally consist of three main components:


Roof deck

A roof deck is the structural substrate and generally is a wood-based material like plywood or oriented strand board (OSB). Because its ties all the structural parts of the roof this is an essential part of roofing.



Underlayment provides temporary protection until a roof covering is installed and supplies a weatherproofing obstacle that is secondary. Occasionally underlayment is referred to as “felt” or “paper.” There are many reasons why the use of asphalt-saturated felt as an underlayment before using asphalt shingles makes roofing sense that is great.

• Underlayments protect the wooden deck from moisture penetration until the shingles are applied, thereby significantly reducing difficulties that can appear when shingles are installed on a surface that is wet.

• Many asphalt roofing manufacturers stipulate using an underlayment over a wood roof deck to validate their guarantees.

•An underlayment should be used on roofs with a pitch less than 8:12., particularly beneath asphalt shingles Using underlayment is usually a requirement for Class A fire resistance.

• Installing an underlayment helps to minimize «picture framing», i.e. the visible outline of deck panels caused by irregularities in roof decking depth.

• The water resistance of an underlayment provides secondary protection by helping protect the deck from wind-driven rain.

• Underlayments additionally offer protection to the shingles from the resins that can be discharged by the wood plank decking.

• Underlayment stuff should rather be asphalt-saturated felt, and if so, they should meet with at least one of the following industry standards:

CSA 123.3-M – Asphalt Saturated Organic Roofing Felt
ASTM D226 – Standard Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing
CAN 2-51.32 – Sheathing, Membrane, Breather Type Paper
ASTM D 4869 – Standard Specification for Asphalt-Saturated Organic Felt Underlayment Used in Steep Slope Roofing.


Roof covering
It is the covering material installed in a building or house over the roof deck. The type of covering used depends on the roofing system specified to weatherproof the structure properly.