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11/15,+1995 07: 38 604530446E DECK--ING PAGE 06 <br /> 3. C'LASSMC.ATIUN <br /> 3.1 The membrane shall be supplied in the following types and Gasses (Notes 1 and 2). as specified (pat. 83): <br /> 3 1.1 Types <br /> Type l Nonreinforced — for flashing only <br /> Type 2 —Containing embedded fibms <br /> Type 3 — With a non-embedded fabric backing <br /> Type 4 — Reinforced with an embedded fabric- <br /> 3.1 2 <br /> abric-3.12 Ckuser <br /> Class A — Nonexposed roofing <br /> Class B – Exposed roofing <br /> Class C—Waterproofing <br /> Claes D — Asphalt compatible, <br /> For Classes A and C. if the membrane has been subjected to only 600 h of accelerated weathering (par.7.3.9).then <br /> its class shall be designated as follows: <br /> Class A --- Nonexposed roofing: Low TJV exposure <br /> Class C — Waterproofing: Low VV exposure <br /> 4. GENERAL REQUIREMEN'T'S <br /> 4.1 The membrane shall be composed of PVC, suitable pls$dcizM. stabilisers, fillets, pigments and ultraviolet light <br /> absorbers where required. The membrane shalt be resistant to mildew and bacterial attack. <br /> 4.2 The membrane shall be uniform in colour and appearance, free from gds, streaks, particles of foreign matter or <br /> undispersed raw material,and free from defects such as pinholes, tears,cracks or blisters.The edges shall be of <br /> nicks and cuts. <br /> 4.3 The membrane shall be capable of being seamed by a joining process, such as solvent welding, hot-air welding, <br /> dielectric welding or ultrasonic welding. <br /> 4.4 The membrane shall be capable of being adhered with the manufacturer's #pproved adhesives wi out <br /> discolouration or deterioration. <br /> 5. DETAILED REQUIREMENTS <br /> 5.1 When tested in accordance with Section 7, the PVC membrane shall comply with the requirements show in <br /> Table 1. <br /> Note 1; In Table 1, Types 3 and 4 have identicat requirements, and Classes A and 0 have tdenricai requirements. Vwiepanve <br /> types and classes have been referenced to assist specifiers. <br /> Nose 2:Type Z membranes cart have a fooic backing that is provided prOnahly to protea or cushion the membro w and lux to <br /> provide reinjarcemen►. Type 3 membranes nomuWy do riot contain any embedded fibres. if there is uncerrainry about how to <br />