For towns with aging concrete water tanks, the dilemma is usually the same: repair or build new. In repair, re-waterproofing can buy another decade or two so they can budget for the new expense.

Think of a basement as a concrete box dug nine or 10 ... you can apply a waterproofing sealer or an epoxy coating. The best approach depends on how much moisture is in the floor.

Other equipment includes roller covers, brushes, knives and scrapers, which most contractors have on hand as part of normal concrete work. Getting started with sprayed-on waterproofing is more ...