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Roof notes

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  • 1. <ul><li>Roof Membranes : </li></ul><ul><ul><ul><li>Built-up roof membrane (BUR) </li></ul></ul></ul><ul><ul><ul><ul><ul><li>3 to 5 plies of felts with asphalt (bitumen) moppings between </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>stone aggregate (3/8” and 400 lbs per sq) laid over a flood coat </li></ul></ul></ul></ul></ul><ul><ul><ul><li>Modified bitumen roof membrane (MBR) </li></ul></ul></ul><ul><ul><ul><ul><ul><li>2 to 3 plies of modified bitumen sheets with moppings between </li></ul></ul></ul></ul></ul><ul><ul><ul><li>Single – ply membrane (SPR) </li></ul></ul></ul><ul><ul><ul><li>one sheet of synthetic polymer (plastic) </li></ul></ul></ul>
  • 2. <ul><li>Bitumen – </li></ul><ul><ul><li>asphalt - waste product (residue) or distilled crude oil </li></ul></ul><ul><ul><li>coal tar – residue of distilled coal (literally “stinks”) </li></ul></ul><ul><li>Roofing Asphalt – </li></ul><ul><ul><ul><ul><ul><li>ASTM specs 4 types (Type I, II, III, IV) Type III: most common </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>softening point temperature (SPT) 185 ° Type III </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>25 lbs. per square for interply & 60 lbs per square for flood coat </li></ul></ul></ul></ul></ul><ul><li>Modified Bitumen Roof Membrane – polymers added </li></ul><ul><ul><li>Styrene butadiene styrene (SBS) synthetic rubber (with mopped asphalt) </li></ul></ul><ul><ul><li>Attactic polypropylene (APP) greater UV resistance (open flame applied) </li></ul></ul><ul><li>Felts (woven sheets) </li></ul><ul><ul><li>organic – paper or wood fibers </li></ul></ul><ul><ul><li>inorganic – glass fibers (fiberglass) </li></ul></ul><ul><ul><ul><ul><li>asphalt-treated fiberglass felt (most common) </li></ul></ul></ul></ul><ul><ul><ul><ul><li>coal tar-treated fiberglass felt </li></ul></ul></ul></ul>
  • 3. <ul><ul><ul><li>SPR Single – ply membranes </li></ul></ul></ul><ul><li>Thermosetting polymer (unweldable plastic) does not soften with heat </li></ul><ul><ul><ul><ul><li>Must use adhesives and or tape </li></ul></ul></ul></ul><ul><ul><ul><ul><li>EPDM (ethlene propylene diene monomer) a synthetic rubber most common </li></ul></ul></ul></ul><ul><li>Thermoplastic polymer (weldable) </li></ul><ul><ul><ul><ul><li>Softens and rehardens with heat </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Not as stretchable </li></ul></ul></ul></ul><ul><ul><ul><ul><li>PVC (polyvinyl cloride) and TPO (thermoplastic polyolefin) </li></ul></ul></ul></ul><ul><ul><ul><ul><li>most common </li></ul></ul></ul></ul>
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  • 6.                                                           TERMS OF USE & PRIVACY POLICY COPYRIGHT 2005 AFFILIATIONS ARCHITECTS PROJECTS COLORS WARRANTIES RETROFIT ACCESSORIES METAL PRODUCT LINE CONTACT US NEWS & EVENTS ABOUT US Fasteners & Accessories Tools Clips Underlayments Pre Manufactured Curbs ReRoof America Roof Hugger Cost Comparison
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