Low Slope Roofing Contractor
Roof systems and materials generally are divided into generic classifications: low slope and steep slope. Low slope roofing includes water impermeable, or weatherproof, types of roof membranes installed on slopes less than or equal to 3:12 (14 degrees). Steep slope roofing includes water shedding types of roof coverings installed on slopes exceeding 3:12 (14 degrees).
There are several classifications of low slope roof membranes or systems.
Most low-slope roof membranes have three principal components:
Weatherproofing layer or layers
The weatherproofing component is the most important element because it keeps water from entering a roof assembly.
Reinforcement adds strength, puncture resistance, and dimensional stability to a membrane.
Surfacing is the component that protects the weatherproofing and reinforcement from sunlight and weather. Some surfacings provide other benefits such as increased fire resistance, improved traffic and hail resistance, and increased solar reflectivity.
Steep slope roofing
There are six generic classifications of steep slope roof coverings.
Steep-slope roof assemblies typically consist of three primary parts:
The roof deck is the structural substrate and usually is a wood-based material such as plywood or oriented strand board (OSB).
Underlayment provides temporary protection until a roof covering is installed and provides a secondary weatherproofing barrier. Sometimes underlayment is referred to as "felt" or "paper."
The roof covering is the external water shedding material.