Robert Evans' Jr Blog

Chimney Flashing

Posted by Robert Evans on Oct 13, 2014 2:59:00 PM

Chimney flashing

Chimney Flashing is a vital part of your roof. Robert Evans Jr. Contracting Inc. gets more calls about leaks around chimneys than about any other problem. And more often than not, the culprit is the flashing, the metal that keeps the intersection between the chimney and roof watertight.

Proper flashing around chimney includeds 2 layers. The first is called step flashing: L-shaped aluminum are woven into the shingle courses and lapped up the side of the chimney. Next comes the counterflashing: A second layer of metal usaully consisting of either Lead or Copper. {Most commonly used is Lead} It is embedded in the chimney mortar joints and folded down to cover the top of the step flashing

The corners are especially vulnerable. We usaully cut and bend the lead around the corner. Even with a good quality installation, this leaves one small spot that should be sealed with a high-quality Caulking such as Geocel.

The type of metal used for flashing depends on where you live. Aluminum and galvanized steel are sometimes used. Copper is the longest lived, but because its so expensive, we see it only on higher end jobs. Another advantage to copper is that the corners can be soldered for a watertight connection.

When a chimney is located at the bottom of a roof slope, a cricket should always be installed, a small diversion roof that prevents water from pooling and ponding behind chimney and eventually leading to seeping through roof into your house.

Schedule your FREE Roofing Assessment Today!

Because chimneys are such a potential trouble spot, inspect them once a year or two for loose or missing flashing and cracks in the masonry, or call on Robert Evans Jr. Contracting at 508-877-3500 and have one of our professionals do the inspection for you.  We also recommend that our customers waterproof their brick chimneys every few years with a brick sealer that can be applied with a garden sprayer. This is a great way to keep water from seeping into the brick.

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Gambrell Roof

Posted by Robert Evans on May 9, 2012 8:50:00 AM

Cooney Pic 5cooney pic 3.1Cooney pic 3cooney pic 2.1Cooney pic 2describe the imagedescribe the image  This large gambrel style home with a large back shed dormer and dattached garage in Wayland Ma. called on the roofing experts at Robert Evans Jr. Contracting to replace there expired 20 yr old roof. Using a Certainteed Landmark Architectural shingle (colonial slate color) and on the back low slope shed dormer mechanically fastened 1/2" inch fiberboard substrate and fully adhered top of the line .060 Firestone Rubbber membrane.

Tags: shed dormer, wayland ma., gambrel Style roof, firestone rubber roof