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- Gather all materials first, then remove old flashing. Pry, chisel and scrape off old metal flashings and roofing cement. Before you do anything, get your ladder, roof brackets and safety harness set up so you can work safely and efficiently on the roof.
- Cut base flashing, then attach the base flashing. Cut a piece of prebent base flashing to fit across the front of the chimney. Cut a 45-degree angle to bend around one side.
- Install front base flashing. Snug this bent end against one side of the chimney front. Mark the edge of the chimney on the opposite end and snip and bend this end.
- Add step flashing and the chimney saddle: Install flashing around the corners. Snip and bend a piece of prebent 8-in. square step flashing to fit 1-1/2 in.
Jul 8, 2024 · 1. Take off the old flashing. Scrape away old flashing and cement with a hammer and chisel. [1] 2. Cut the base flashing. Use tin snips to cut the bent base flashing that you ordered from the sheet metal shop. Cut the flashing to fit along the chimney's front. Bend 1 side of the flashing around 1 edge of the chimney.
- 3. Secure the base flashing. Fit the flashing up against the front of the chimney. The part of the flashing that lies flush with the roof should ov...
- 4. Attach the corner and step flashing. Fit an 8-inch (20.3-cm) piece of square step flashing over the chimney's front corner. Set the flashing asi...
- 5. Secure the chimney saddle. Fit the chimney saddle around the back of the chimney. Use a hammer and roofing nails to attach the saddle to the roo...
- 6. Install the cap flashing. Use a circular saw to saw grooves into the mortar joints. The grooves should be 1 inch (2.5 cm) deep. Saw as high as t...
Proper flashing around a chimney includes two layers. The first is called step flashing: Sections of L-shaped sheet metal are woven into the shingle courses and lapped up the side of the chimney. Next comes the counterflashing: A second layer of metal is embedded in the chimney mortar joints and folded down to cover the top of the step flashing ...
- Flashing Design and Materials
- Inspections and Maintenance
- Hiring A Professional Roofer
- So, Is Leak-Proof Flashing Around Your Chimney Important?
Proper flashing around a chimney includes two layers. The first is called step flashing — sections of L-shaped sheet metal are woven into the shingle courses and lapped up the side of the chimney. Next comes the counterflashing — a second layer of metal is embedded in the chimney mortar joints and folded down to cover the top of the step flashing. ...
Because chimneys have so many potential leak points, I recommend inspecting the flashing and masonry at least every other year. Look for the following trouble signs: 1. Loose, curled, or missing sections of flashing 2. Cracks or missing mortar in the brickwork that can allow moisture penetration 3. Signs of water damage, such as rotted sheathing un...
While minor chimney flashing repairs are doable for a handy homeowner, extensive issues are best left to a professional roofer. They have the skills, equipment, and experience to diagnose and fix chimney leaks for the long run. Before hiring one, get multiple quotes and check references to find trustworthy local roofing contractors. Make sure they ...
Proper flashing is critical for keeping the vulnerable chimney–roof intersection watertight. Deteriorated, improperly installed, or missing flashing can allow torrents of water into your attic and walls, leading to expensive structural and interior damage. Regular inspections and prompt repairs of any issues are key to avoiding major chimney leak h...
Lap the underlayment onto the chimney sides, then wrap it around the chimney corners. 3. Fit the apron. Install the apron on the downslope side of the chimney. Tuck the vertical leg’s top edge into the groove cut around the chimney, then lap the horizontal leg onto the shingles in front of the chimney.
1. As you roof along a chimney, alternate shingles and L-shaped pieces of step-flashing. Counterflashing will cover the tops of the step-flashing. For extra protection, run a bead of urethane between the step-flashing and the chimney. Press the flashing into the urethane to achieve a positive seal.
People also ask
What is chimney flashing & Counterflashing?
What is a chimney step flashing?
How do you flash a chimney?
How do you flash a chimney apron?
Mar 22, 2022 · In this video we’ll show you how to install roof flashing around a chimney. Whether you are flashing the bottom, top, or sides of the chimney frame, there ar...
- 13 min
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- Roof Repair Specialist
