How To Install Flashing at Roof Eaves as an Ice Dam Barrier

Flashing along roof eaves is not just an added accessory in a house. It really is a great help during the rainy and winter seasons, one great protection against water and ice damage. An ice dam is a huge amount of ice that accumulates usually in the gutter of the roof, and because of its large amount, water can dam up on it. With flashing installed in your roof, a double-layer protection in your sheathing is mounted, which will prevent the water from running under the shingles of the roof’s eaves, saving the sheathing from stains and eventual damage.

  • Prepare the materials needed.  The best time to add a flashing in a roof is during new home construction or when you are reroofing. Surprisingly, it’s easy to install and materials are readily available in any hardware near you. You will only need a metal flashing, a metal drip edge, nails and about 50 pounds of asphalt-felt to get this done in your roof. Be sure that the area is clean and dry before proceeding with the installation. Remember to wear protective gears such as gloves and proper eyewear to ensure safety.
  • Installation.  To do this, you need to pre-install an underlayment that is compatible with the type of your roof. You can check manuals or manufacturer’s instructions to install this underlayment and to verify the proper underlayment fitted to your roof.
  • Layering.  Next, you need to lay a 50-pound asphalt-felt (a uniform, flexible felt of organic fibers, impregnated with an asphalt saturant) over the underlayment you installed at the eave of your roof. It is more durable and visibly thicker than the regular underlayment.
  • Drip edge fixing.  Then, install a drip edge by nailing it along the eaves of the roof under the builder’s felt and over the fascia. A drip-edge is a corner-shaped metal strip that allows water from the roof to run smoothly off the edge. It helps put off stains and eventual damage caused by water running down the side of the fascia. You can use small roofing nails but make sure that it is properly placed under the shingles. As an extra precaution, you can cover the nail heads with roofing cement then stick the felt down.
  • Mounting.  Lastly, mount the flashing across the eaves of the house by nailing every one inch or so near its outside edges. Make sure that it overlaps the drip edge with at least four inches. This gives the roof sheathing a protection from cold weather problem caused by snow melting over heated portions of the house. And just like the drip edge, you can also seal seams and all nail heads with roofing cement to make it look cleaner.

Prevention is always better than cure. Be prepared always. Don’t wait for those ice dams to build before you think of ways on how you are going to get rid of it. Flashing in your roof is a great barrier against ice dams or any other water damage. It can give you no worries from leakage during winter or rainy seasons.


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