DAS Products - Roof Coating Mainenance Procedures

Type III – Major Repairs

In most cases, major repairs, which include extensive foam replacement and recoating work, should not be attempted as a part of maintenance procedures. Rather, an approved applicator, who has proper equipment and skills, should be employed.

In terms of long-term preventative maintenance, a properly installed and maintained SPF Roof System normally will not need recoating for more than 10 years.

Repair of Ponded Areas.

Ponding is defined as more than 24 hours after rainfall ceases, water 1/2 inch or more deep or an area of water greater than 100 square feet.

Solution: The best solution to this problem is to check the slope prior to applying the coating. If the job has been completed, however, and ponded areas are then found, there are three remedies:

Channel the foam to provide drainage. Foam thickness at the base of the channel should be at least 1/2 inch to 1 inch. Foam that has been exposed to channeling must be coated with manufacturer-approved Building Sealant.
Add a drain.
Scrape off the coating and foam skin in the ponded area and build up the area by re-foaming. It is not acceptable procedure to apply foam directly over the coating.

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