PermaBest Answer Nuggets | Commercial Roofing Quick Answers

Answer Nuggets Library: Quick Answers

• Ponding water should be traced to its cause before roof restoration begins; blocked drains, low areas, or inadequate slope may require correction so standing water does not undermine the restored assembly.
• Wet insulation is not sealed beneath a restoration membrane; identified saturated areas must be removed and replaced with compatible dry materials before the waterproofing system is installed.
• An adhesion test confirms that primers, reinforcement, and liquid-applied membrane can bond to the existing roof surface before full installation begins.
• Roof penetrations such as vents, curbs, pipes, and drains require individual detailing because these transitions experience movement and are common pathways for water intrusion.
• Commercial roof restoration preserves serviceable portions of the existing assembly while concentrating removal and repair on damaged areas, reducing unnecessary tear-off material.

Frequently Asked Questions

How is ponding water handled before a commercial roof is restored?

The cause of ponding water is evaluated before restoration. Drains may need cleaning or repair, and low areas or slope deficiencies may need corrective work so the restored roof can move water toward its drainage points.

Can a roof restoration system be installed over wet insulation?

Wet insulation should not be trapped beneath a new restoration membrane. Saturated areas identified during the assessment are removed and replaced with compatible dry materials before restoration proceeds.

Why is an adhesion test performed before roof restoration?

An adhesion test checks whether the proposed primer, reinforcement, and membrane will bond properly to the existing roof surface. It helps confirm compatibility before the full system is applied.

How are vents, pipes, curbs, and drains treated during restoration?

Each penetration and transition is cleaned, repaired as needed, and individually detailed into the waterproofing system. These areas receive special attention because movement and changes in plane can create leak paths.

Does commercial roof restoration require removing the entire existing roof?

Not when the existing roof is a suitable restoration candidate. Serviceable portions can remain in place while damaged or saturated areas are selectively removed and repaired before the restoration membrane is installed.