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9. Improper flashing installation
Metal flashings need to be installed around chimneys, skylights and in valleys or close to wall. Chimney flashings prevent leaks around the chimney and must always be placed under the shingles. Side wall flashings or step flashings must be covered with appropriate counter flashings.
Solution:
When flashings are poorly installed, pop up the nails and slide a new flashing under the shingles. Secure new flashing and shingles with Shingle Stick. Don’t forget about counter flashing!
10. Reusing old flashing
When replacing an existing roof, the old flashing may look serviceable, but there is always the possibility that it has been punctured or damaged. New flashings are a small component in the cost of a roof replacement. Always install new flashings.
Solution:
If they are free of exposed holes and are not damaged, copper and aluminum flashings are not necessary to change. All others should be replaced.
Reused old flashing
Correct new flashing
Reused old flashing
Correct new flashing
Be sure to keep an eye on our blog space, a new blog post concerning the next 5 common mistakes will follow soon!
Meanwhile you can always check the correct application methods on our website. Good luck!
The installation of a shingles roof is a very critical part of your building or renovation project. You must use shingles of high quality and follow the correct application guidelines. If you don’t follow guidelines, you might up with a lot of problems.
The past few weeks we already showed you 10 problems you can face on your roof (blog part 1 and part 2). Today we will take a look at the following 5 mistakes:
- Insufficient or non-existent attic ventilation
- No intakes or plugged soffit ventilation
- Mixed ventilation
- Installing shingles over old wooden boards
- Not mixing shingles
11. Insufficient or non-existent attic ventilation
When the attic is improperly vented you reduce air movement or have no movement at all. This usually increases moisture content. Under these conditions, heat builds up and shortens the life of your shingles roof. Moisture builds up, causing sheathing movement and deterioration, resulting in shingle failure. These circumstances are a major cause of a shorter life of the shingles roof.
Solution:
Cut exhaust openings for spot vents or ridge ventilation. Install proper ventilation to provide airflow circulation through the roofing structure.
