Do you really need drip edge flashing? How should it be installed? Where should it be installed? And what is a drip edge for? If you’ve ever thought about re-roofing your home, it’s likely you might’ve asked a few of these questions.
For starters, you do need a drip edge. Why? Because a drip edge is what prevents water from running down your home’s fascias, soffits, and walls – and maybe even inside your home. A drip edge is installed under the roof’s shingles, under the underlayment, and behind the roof gutter. In the place of no gutter, a drip edge directs water off of your roof away from the walls. If there is a gutter, a drip edge directs water into the gutter, and not behind it where it can run down your home’s walls.
But a drip edge also needs to be installed with some space between the drip edge and the fascia board. When it is installed too tightly against the fascia board, it is impossible to get the upper edge of the gutter behind the drip edge. And what this means is that water can still run behind the gutter and not into it – where it shouldn’t go.
When it is installed properly, a drip edge keeps water from collecting where it shouldn’t – which is anywhere near your home. But when there is no drip edge, or it is not installed properly – such as leaving a gap between the drip edge and the gutter, or fastening it too tightly against the roof fascia board water can be sent behind the gutter, or if there is no gutter, against the fascia board and walls of your home. The result? Water damage in the best case scenario, and water damage plus mold and mildew in the worst case scenario.
Whether installing a drip edge, or any roofing material, it is always helpful to remember a fundamental axiom of roofing – all materials should be installed such that they direct water back out onto the roof surface – toward daylight, and not into the roof layers or structure.
This article is brought to you by ASAP Roofing, a national roofing company that specializes in hail damage, roofing restoration and weatherization. ASAP has offices in Denver, Dallas, and Indianapolis.