Waterproofing Underlayment

A roof depends on gravity to make water run down an doff, but when held back by ice, or during intense driving rain, water can work its way up and under even properly installed shingles. Because normal felt underlayment is not completely waterproof, especially around nail holes, water can work its way in. Highlands Ranch roofers say, for those who experience harsh winters it's reassureing to know you can install additional insurance afainst water dmage.

Waterproof shingle underlayment is a special material mafe of asphalt and elastic polumers designed to adhere tightly to roof sheathing and around the shanks of nails driven through it. This self-sealing attribute ensures that water cannot fet past it, even where you drive a nail.

Install the underlayment along those areas where ice dams and driving rain can create a problem, or where water tends to accumulate along the eaves, around skilights in calleys, in saddles or on low pitched roofs. Noramal felt underlayment should still be installed in non-critical areas, and metal flashing shoulf still be used as per ordinary roof