Problems

• Poor, inconsistent weld
• Seam voids
• Fastener placement
• Fasteners too long, or too short
• Unadhered membrane
• Unadhered base flashing
• Contaminated roof substrate
• Flashing displacement
• Abuse of installed roof

Solutions

• Conduct test welds; probe all seams
• Don’t start and stop welding excessively
• Adjust screw gun clutch setting
• Ensure fastener engages deck, in top flange
• Use correct adhesives at right rate and temp
• Use initial priming, 2nd adhesive application
• Use broom or blower prior to installation
• Follow fastener placement guidelines
• Protect membrane; use job sequencing

"As long as the cost of maintenance is less than 1.6%
of the initial cost of the project, the cost of the maintained roof-on an annual basis-will be less than the
un-maintained roof."
Peter Kalinger, Technical Director, Canadian Roofing Contractors Association


The choice not to have a maintenance program can cost an owner as much as $0.15 per sqft, per year.

Based on this estimate, the owner will be losing appx $33,000 per year.