The 10 Most Common Roofing Mistakes

Published Oct 20, 20
5 min read

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When the shingles are being used, lay them over the valley flashing, trim the ends to the chalk line and nail the shingles at least 50 mm (2) back from the chalk line. Cut a 50 mm (2) triangle off the top corner to direct water into the valley and embed the valley end of each shingle into a 75 mm (3) band of asphalt plastic cement.

Set up metal flashings where shingles meet walls or chimneys, too. Ice and water protector membranes work well to flash and help secure around skylights, dormers, turbines and other tricky roofing locations. Apply flashing materials in performance with the shingle installation treatment, with both the flashing and the shingles set up to work together to protect around the joint locations - asphalt roof shingles.

When applying the brand-new shingles, each shingle course will be covered by a step flashing. Metal Step Flashing Pieces There are 2 basic rules to follow: Each flashing need to overlap the one listed below by a minimum of 75 mm (3 ), but not show up below the shingle top lap. Insert each action flashing in a 75 mm (3) wide application of asphaltic plastic cement, and nail in place.

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The metal action flashing pieces are rectangular fit and design, roughly 250 mm (10) long and a minimum of 50 mm (2) larger than the face of the shingle being used. For instance, when utilizing metal flashing with shingles with a common 143 mm (5 5/8) direct exposure (such as conventional 3-tab shingles), the size of the flashing will be 250 mm x 200 mm (10 x 8).

Note: Other action flashing sizes are likewise acceptable. For IKO's Cambridge shingle, with its bigger 5 7/8 direct exposure, a 10 x 8 flashing piece is still ideal, considering that the 8 measurement is still a minimum of 2 bigger than the shingle's exposure measurement. However, when flashing Crowne Slate, with its much larger 10 direct exposure, the flashing piece would require to be 10 x 12.

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Place it so the tab of the end shingle covers it completely. Secure the horizontal flange to the roofing system deck utilizing 2 nails. Do not attach the flashing piece to the vertical wall. This will enable the flashing piece to move independently of any differential expansion and contraction that might occur in between the roofing deck and the wall.

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Make sure that the tab of the shingle in the 2nd course will cover it completely. Secure the horizontal flange to the roofing. The 2nd and prospering courses will follow with completion shingles flashed as in preceding courses. When everything that goes below the shingles has been correctly prepared and set up, it's finally time to learn how to shingle a roofing system.

First prior to you lay the field shingles (" field" describing the large stretch of roofing system within the borders of eaves, ridge and rakes) it is very important to install a preparatory course of starter shingles which are particularly made for that function. However, even if you fashion your own on-site by cutting basic shingles to size, both serve important functions at the roofing system's eave.

Expert specialists frequently recommend and use starter strips along rake edges in order to yield a straight edge from which all the field courses can begin. Additionally, these starter strips improve the roofing system's wind-resistance at the rake. It's important to follow the manufacturer's guidelines for the specific roofing system shingle due to the fact that not all shingles have the same exposure (the part of the shingle that shows up once set up), offset (the lateral range in between joints in succeeding courses often called 'stagger' or 'edge-to-edge spacing') and/or nail placement.

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You should position nails in the proper area and drive them flush with, however not cutting into, the shingle. Nailing the shingles correctly is crucial to the roof system's wind-resistance. Appropriate nail placement is likewise a requirement for the shingles' restricted warranty coverage. If you've selected closed valleys, they are finished as shingle courses approach and run through the valley. house shingles.



As shingles are set up on the adjoining roof location, completion of each course of shingles is trimmed (cut) 2 back of the valley centerline. You have actually nailed in the last field shingle and you can see the goal from here. Well done! In this case, the finish line is the hip and ridge capping. installing shingles.

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Instead, specific ridge cap shingles are utilized to straddle the ridge and shed thin down either slope. There are various ridge cap shingles offered on the market however, as soon as again, the procedure for installing them is based upon the very same fundamental principle of overlapping. For hips, begin at the bottom and work upslope.

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