Protecting In-place Waterproofing

Most waterproofing systems need protection during backfilling. Some manufacturers have their own protection board for this purpose. A drainage mat or insulation can also function as protection board. An inexpensive 1-inch-thick expanded-polystyrene-foam board works fine as a basic protection course. However, one manufacturer has a protection board that functions as insulation, protection board, and drainage medium in one.

When adhering protection board, make sure to use an adhesive that's compatible with the waterproofing membrane. I've seen some adhesives eat right through waterproofing material. Besides providing protection during backfilling, you should protect waterproofing work that is in place from damage by other workers and trades. Keep workers from tracking across exposed membranes on footings, decks, or other horizontal surfaces. Don't expect others to be as sensitive as you are to the importance of waterproofing.

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