Flat Roof System Types
Two Ply Roofing Systems.
The two ply roofing system is a lightweight, highly flexible membrane designed to retain its elasticity through severe solar load, ultraviolet rays, thermal shocks, random ponding water, and extreme low temperature. Both Paradiene’s top and base plies consist of an elastomeric asphalt blend – a unique formulation of SBS and high quality proprietary asphalt – reinforced with a fiberglass mat.
The granule surface means the system doesn’t require the application of gravel, giving it a light installed weight of approximately 200 pounds per square, and making inspection and repair easier.
Four Ply Built Up Tar And Gravel.
BUR systems generally are composed of alternating layers of bitumen and reinforcing fabrics that create a finished membrane. The number of plies in a cross section is the number of plies on a roof: Built up roofs generally are considered to be fully adhered if applied directly to roof decks or insulation.
The reinforcing fabrics also are called roofing felts or ply sheets. Roofing felts are reinforced with either glass-fiber mats or organic mats. Felts are produced in a standard width of 36 inches and metric width of about one meter.
The bitumen typically used in BUR roof systems is asphalt. The asphalt is heated in a kettle or tanker and then applied by mop or mechanical spreader. Asphalt is a petroleum product refined from crude oil; coal tar is derived from the distillation of coal. Cold-applied adhesives typically are solvent-based asphalts that don't have to be heated in a kettle or tanker.
Surfacings for built up roof systems include gravel, glass-fiber or mineral surfaced cap sheets, hot asphalt mopped over the entire surface, aluminum coatings or elastomeric coatings.
Single Ply Roofing system Used In Larger open Commercial Warehouses Or Slopped larger Roofs.
Single Ply roofing membranes provide a variety of materials to choose from. Their main characteristic is that they are designed to be installed in one layer. They also exhibit great flexibility and their resistant to UV radiation is superior when compared to other products.
It is a usually black or white finish, and glued, fastened or install directly over roof Industrial material.
Three of the most commonly used thermoplastic single-ply membranes are PVC, EPDM and TPO, both of them plastic-based materials. The membranes are usually manufactured to include a reinforcement layer, normally polyester or fiberglass that provides additional strength and stability.