Celotex Roofing For Use In:
Bituminous System: BUR

Built Up Roof (BUR) – A roof consisting of multiple plies of roof felts laminated together with bitumen.  Built-up roof material can consist of bitumen-saturated felt, coated felt, polyester felt or other fabrics.  A surfacing is generally applied and can be asphalt, aggregate (gravel or slag), emulsion or a granule-surfaced cap sheet.

• Commonly referred to as “tar and gravel” roofs
• Composed of alternating layers of bitumen and reinforcing fabrics that create a finished membrane
  
  • The bitumen is typically asphalt, coal tar or cold-applied adhesive
  • The reinforcing fabrics are also called roofing felts or ply sheets
• Surfacing for built up roof systems include aggregate (gravel, slag or mineral granules), glass-fiber or mineral surfaced cap sheets, hot asphalt mopped over the entire surface, aluminum coatings or elastomeric coatings

Standard UL Class A/FM 1-90 BUR System

1. Metal deck
2. ½" Structodek® HD fiberboard roof board (optional)
3. 1 ½" rigid foam installation
4. ½" Structodek® HD fiberboard roof board
5. 3, 4, or 5 multi-ply BUR system