Roof Flashing

You can use silicone caulk around the upper lip of your roof vent boot to seal it temporarily, or you can slide a repair sleeve over the roof vent and old vent boot to stop air and water leaks temporarily. However, these aren’t permanent solutions, so you should always hire a professional to come out and replace the roof vent boot for a long-lasting fix and peace of mind.

The average cost to replace chimney flashing professionally is between $400 and $1,600. Expect to pay $50 to $200 for the flashing sheets and basic supplies. While you can save big going down the DIY route, this is a technical job with high safety risks. The peace of mind you get from hiring a professional is often worth the extra cost.

Roofers don’t typically replace vent pipes themselves, but they do handle the flashing and seals around vent pipes when working on a roof. During a roof replacement or repair, roofers inspect the vent pipe flashing for damage, replace deteriorated seals, and ensure the pipe is properly integrated into the roofing system to prevent leaks. If the vent pipe itself is cracked or damaged, a plumber is usually required to replace it, while the roofer ensures the roofing components around the pipe remain watertight.

A roof drip edge has a "T" shape and goes along the edge of the roof. Installers put it on the trim. On the other hand, a gutter apron flashing goes under the shingles and has an "L" shape. They're similar in price and both help make sure the rainwater flows to the gutters instead of pooling or seeping into the house.