Roof Weather Proofing Materials

The weather proofing material is the topmost or outermost layer, exposed to the weather. Many different kinds of materials have been used as weather proofing material:

• Shingles & Faux Shingles
  • Slate. Long life, High cost
  • Ceramic. Long life, High cost
  • Metal. Long life. High cost, should be on roofs of 6/12 pitch or greater.
  • Cement (usually reinforced with fibres of some sort)
  • Asphalt shingle (bitumen embedded in a paper or fibre mat) Cost effective. Various life span expectancies.
  • Fiberglass shingles
  • Cedar. Long life. However, young growth cedar has a short life expectancy. High cost. Should be allowed to breathe.
Care Gutter Roofing  Ondura Roofing  Steel Rafter
• Membrane
  • Thermoset (e.g. EPDM synthetic rubber). Synthetic rubber strips chemically welded together with solvent or tape. Primary application is big box store with large open areas and little vertical protrusions. Relies heavily on the skill of the applicator. Detail critical.
  • Thermoplastic plastic (e.g. PVC). Plastic strips welded together with hot air. Can be rewelded. Lends itself well to both big box and small roof application because of its hot air weldability. Relies heavily on the skill of the applicator. Detail critical.
  • Copolymer (e.g. TPO) polypropylene and ethylene propylene rubber. Welded together with hot air. Combines the best features of EPDM and PVC. Relies heavily on the skill of the applicator. Detail critical.
  • Modified bitumen ("torch on or asphalt bonded"). Asphalt embedded in a fiber mat, seams sealed by locally melting the asphalt with a torch or a hot mopping of asphalt. Lends itself well to all applications. Requires some training. Virtually foolproof.
  • 4 ply ("Felts" of either asphalt impregnated paper or fiberglass reinfoced synthetic mat laid out in strips and bonded togeter in plys using hot asphalt and then surfaced with a layer of pea gravel. Lends itself well to all flat roofs. Requires some training. Virtually foolproof.
  • Spray-on foam (isocyanurate foam with an elastic rubber top coat)
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• Panel
  • Corrugated metal
  • Standing-seam metal
  • Flat-seam metal
• Fabric
  • Dacron/polyester
  • Teflon embedded in fibreglass
• Straw, or reed thatch

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