Bid #01-1112 Library and Reprographics Roofing ... - Citrus College

B. General (Mechanical Well): Ensure that substrates are free from gross irregularities,
loose, unsound or foreign material such as dirt, ice, snow, water, grease, oil, bituminous
products, release agents, laitance, paint, loose particles/friable matter, rust or any other
material that would be detrimental to adhesion of the catalyzed primer and/or resin to the
substrate. Some surfaces may require scarification, shotblasting, or grinding to achieve a
suitable substrate. Wipe surfaces with a clean cloth saturated with the specified
cleaner/solvent to remove grease, oils or dust that may affect adhesion and to cured PMMA
surfaces to receive a subsequent coat of resin.
C. Remove All Existing:
- Surface gravel
- Roof membrane
- Insulation
- Base flashings
- Edge metal
- Flanged metal flashings
- Cants
- Walkways
- Non functional penetrations/curbs
- Drain assemblies
- Vapor retarder
- Metal trim, counter flashing
D. Damaged And/Or Deteriorated Deck: Inspect decking; make necessary repairs or replace
sections of deck that cannot be repaired. Submit a unit price for replacement of sections of
roof deck.
E. Wall Preparation: Repair minor cracks, surface irregularities, and open joints in masonry
walls using a quick dry grout mix to ensure a smooth, even surface for application of the
roofing/flashing membranes.
F. Existing Curbs: Raise all existing curbs to accommodate a minimum flashing height of 8
inches.
3.03 SUBSTRATE REQUIREMENTS
A. Roof Decks: Structural roof decks should properly provide sufficient strength to support
anticipated dead and live loads and normal construction traffic without excessive deflection
or movement. All openings, walls or projections through the roof deck should be completed
before application of the roof membrane is begun. The deck should be constructed and
necessary deck repairs made according to the deck manufacturer's specifications following
best established practices.
1. Metal Decks: Metal roof decks should be constructed in accordance with Factory
Mutual structural requirements listed FM Global Property Loss Prevention Data Sheet 1-
29. Steel roof decks should be 22 gauge minimum factory galvanized or factory coated
with aluminum zinc alloy for corrosion protection. Galvanized protection shall comply
with ASTM A 525, Class G-60 or Class G-90. Zinc alloy protection shall comply with
ASTM A 792. Steel decks should be shop primed, clean, dry, with ribs of deck free of
snow, ice or water. Top flanges of installed steel deck should be flat. Mechanical
M-13-135 page - 16 Citrus Reprographics Roofing Specification