How To Chimney Flashing
Front Base Flashing - You will need a sheet of metal at least 12 inches wider than the width of your chimney.
How to chimney flashing. The horizontal leg goes under the shingles and the vertical goes up the sides of the chimney. Check to find out if the flashing is loose anywhere. A sheet metal shop that specializes in roofing can.
Flashing will have two-panel parts. First the existing chimney flashing and shingles surrounding the chimney are removed. Pre-Bent Step Flashing - These are commonly referred to as shingle tins.
Cut an indent into the chimney with a diamond bit sawdiamond grinder disc. Ensure the chimneys base flashing is in proper order secured to the roof as the manufacturer or mason recommends beneath the shingles. Chimney flashing is usually found under the shingles at a 90-degree angle.
That means actually climbing up on the roof and checking all around the chimney to look for any signs of breaks or cracks. Then the base flashing is installed around the bottom of your chimney. Before going up on the roof to do the replacement it is recommended that measurements are taken around the chimney so that the flashing can be ordered.
Each layer of flashing is then covered by the roof tile as you work your way up the side of your chimney. They are 8 by 8 inch pieces that will be stepped together. If you were not provided with base flashing you can install step flashing up the side of the chimney.
The only way to repair flashing is to replace it. This may need to be adjusted once you get it home by bending the angle to match the roof slope. The step flashing which is the first layer on the sides of the chimney is made from L-shaped pieces of copper lapped so that they shed water running down the roof.
This avoids the need for climbing up. It is attached to one side of the chimney and one side on the roof. Chimney flashing is the layer of sheet metal that connects the roof to the chimneyIt is designed to be the seal that prevents water from entering your home by running down the chimney.
This is where you will hang the counter-flashing. This flashing wraps a few inches around the sides of the chimney. Step flashing which goes underneath shingles and bends upward against your chimney then counter flashing which wraps around over top on the first part before being cut back into mortar joint near the.
The bottom base flashing is made of a single piece of metal extending 3 to 6 inches down over the shingles that already have been installed and 12 inches some say less up the bottom face of the chimney. Most often when a chimney leaks the leak originates in that spot. The front flashing back flashing and side flashing are then installed.
Pieces of step flashing and shingles are overlapped and interweaved to redirect water away from the chimney and roof. Its important to have flashing installed between your chimney and roof for protection against water seeping in.
