Roof Installation Interply Void Tolerance

Ensure all products are appropriate for the installation environment and array under the site s loading conditions.

Roof installation interply void tolerance.

Varied building systems have been developed to support vegetative covers on steeply pitched roofs. Replaced in a 1900 renovation the slate roof on the white house was replaced with sheet iron in 1804 the copper roof on the old church of christ in philly lasted from the 1830s to 1967. Roofing membranes for low slope application. Section 3 truss installation 3 1 general 3 2 set out 3 3 lifting 3 4 first truss 3 5 subsequent trusses 3 6 erection bracing and tolerances section 4 roof bracing 4 1 general 4 2 battens 4 3 top chords 4 4 bottom chords 4 5 webs 4 6 top hat construction section 5 truss connections 5 1 hip ends 5 2 girder 5 3 gable end trusses.

During installation of hot bituminous systems care warns that improper mopping can produce voids in the membrane block drains and result in ponding water as well as void the warranty. Comply with all applicable local or national building and fire codes including any that may supersede this manual. Additional membrane s sheet to complete the roofing system. The pressure developed in the void stretches.

Pitched roof systems sometimes merge into vertical facade vegetative techniques. Roof traffic in an effort to avoid the inherent danger associated with walking on a roof we recommend that only licensed and insured professional contractors traverse roofs. Prime concrete decks prior to application with pg 100 asphalt primer. Figure 2 poor interply bonding due to low application temperature a cap sheet b base sheet.

Moisture trapped in the void expand. The area to be repaired should extend a minimum of 18 inches beyond the perimeter of the defect to provide an ample clean area on which to install the patch and tie it into the existing roof membrane. Pierce cautions that before roof repairs are hastily made the source of the ponding water should be investigated. Remove debris contaminants aggregate or loose surfacing from the surface of the membrane or flashing to be repaired.

When reroofing remove all prior roofing materials down to a clean debris free substrate and properly close off all abandoned roof penetrations. New york city hall used copper for roofing circa 1764 a copper roof was used on the rebuilt old senate chamber in 1819. Installation procedures product and safety standards. Apply over clean dry dust and debris free substrates.

Caution should be exercised to ensure personal safety and prevent damage to roof tiles that may void the warranty.