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Sheet membrane roofing – dirt on membrane roof

Sheet membrane roofing – deterioration along substrate joints

Sheet membrane roofing – impact or puncture damage

Sheet membrane roofing – surface deterioration (cracking, crazing)

  • UV light degradation

    How to repair

  • Expansion/contraction of substrate resulting in over-stressing and failure of the membrane

    How to repair

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Sheet membrane roofing springy or spongy to walk on

  • Damage to the substrate and/or framing due to water entry through the membrane or through adjacent wall claddings 

    How to repair

  • The substrate material is not thick enough to span rafters/joists

    How to repair

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Water ponding on sheet membrane roofing

Nails have popped in substrate under sheet membrane roofing

Bubbles in sheet membrane roofing

  • Poor adhesion of the membrane to the substrate

    How to repair

  • Adhesive misses – the membrane is not fully adhered to the substrate

    How to repair

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Deterioration of sheet membrane roofing patching

  • Incompatible patching material was used; for example, rubber membrane used to patch bitumen-impregnated membrane

    How to repair

Delamination of sheet membrane roofing from substrate

  • Incompatible membrane material was laid over substrate, such as rubber membrane over bitumen-impregnated membrane. The adhesives used in a rubber-based membrane are solvent-based and react with the oils in the asphalt, causing the membrane to separate from the asphalt

    How to repair

  • Poor installation

    How to repair

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Sheet membrane roofing – lifting of sheet joints