Flashings

The purpose of flashings is to prevent the entry of water at areas on a roof where two components join together or intersect (i.e. one roof to another or a chimney thru a roof). Flashings can be constructed of galvanized steel, tin, aluminum, copper, lead or lengths of roll-roofing. The choice of flashing material will be dependent upon the construction of the roof and the material used for the roof covering.

Flashings will expand and contract, metal in particular, with heat from the sun and air temperature changes. They are also expected to move and stretch with typical building shifts. The areas where flashings are required are typically very vulnerable to water penetration. There is a high risk of water leakage and wood decay from a damaged, loose or poorly constructed flashing. For all of the above reasons, regualr monitoring and routine maintenance of the flashing areas is issential to preventing leaks.

If you're collecting dripping water in a pot beneath your roof, you may want to inspect the roof flashing. Anywhere surfaces intersect on a roof is a prime spot for water seepage. Flashing provides the extra protection these spots need. These problem areas include the edges of skylights and chimneys, soil stacks, vent fans and roof valleys, as well as the intersection of the roof deck and dormer walls.



Most flashing is made of galvanized metal, but DIY'ers may prefer aluminum flashing because it's easier to bend. Most flashing products are designed for easy installation, and if the material is installed correctly, then your roof shouldn't leak. However, from time to time, the nails that fasten flashing work loose, or the flashing material pulls away from seams and joints and requires maintenance. Here's a look at some general principles of roof flashing that will help guide you through a proper repair or replacement—or even new construction.

 

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  Updated MAY 7 , 2008 , 12:06:00 PM.
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Residential Remodelers. LLC Email:newjerseyremodelers@gmail.com
Long Valley, NJ 07853, in Morris County Please contact us Tel: 1-877-388-7360
with any questions Tony Charles

24 Hr Emergency Service

Roofing Types

Roofing: Checklist
Roofing: Felt Shingles
Roofing: Framing
Roofing: Introduction
Roofing: Layout
Roofing: Sheathing the Roof
Roofing: Shingles
Roofing: Soffits
Roofing: Trusses
Shingling Around Chimneys
Shingling Hip Roofs