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7. Use of improper nails
The standard roofing nail has a barbed body and nominal shank diameter of 2.7 mm with a head from 9 mm in diameter. Roofing nails must be corrosion resistant and galvanized. Properly driven and applied roofing nails are the only preferred fixing system for asphalt shingles!
Solution:
If shingles are applied with staples, refix every shingle with proper roofing nails and, if necessary, apply some Shingle Stick. If you experience leakages through the corroded nails, try to fix these leaks with Shingle Stick. If this doesn‘t help, you have to consider a new roof.
8. Not aligning shingles correctly
Shingle alignment - both vertical and horizontal - is required. The best way to ensure that the shingles are horizontally aligned in new applications is by the use of a chalk line. Especially for tab shingles, the use of chalk line is highly recommended. The bottom edge of laminated shingles must align with the tops of the saw teeth of the shingles in the underlying course. Too high alignments increase the chance of wind blow off and wind driven rain backing up under the shingles.
Solution:
When the roof doesn’t leak this is only an aesthetical problem.
Incorrect overlapping of Cambridge Xpress
Horizontal chalkline will help you align
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
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!
Modern architectural design has changed a lot through recent years, even when we consider typical roof and wall material. Many standard roofing materials can now be installed on both very steep slopes and vertical walls. Nowadays these materials used on roofs and walls, not only have a waterproofing function, they also have an aesthetic importance.
The most commonly used materials are clay tiles, metal tiles, slate or wooden shakes and bitumen shingles. In taking a closer look at bituminous shingles as a roofing material, we can see one of the advantages is that they are very light, which makes them easy to apply on a wide angle from 9.5° up to 90° degrees (i.e. a vertical wall).
One of our most suitable roof shingles is the self-adhesive IKO Cambridge Xtreme 9,5°. Thanks to its usability on extreme slopes (9.5° up to 90°), many architects and designers choose this roofing material for its 3D dimensional look, with imitation of wooden shakes, natural stone and slate, resulting in an exclusive look and feel. The IKO Cambridge Xtreme 9.5° is available in seven natural colors and provides a 30 years warranty on material.