Asphalt Shingle Roof Installation Procedures - Best Practices ...

Published Oct 20, 20
5 min read

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When the shingles are being applied, lay them over the valley flashing, trim the ends to the chalk line and nail the shingles a minimum of 50 mm (2) back from the chalk line. Cut a 50 mm (2) triangle off the leading 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 assist secure around skylights, dormers, turbines and other difficult roofing areas. Apply flashing materials in concert with the shingle setup treatment, with both the flashing and the shingles set up to interact to protect around the joint areas - asphalt roof shingles.

When using the new shingles, each shingle course will be covered by an action flashing. Metal Step Flashing Pieces There are 2 easy rules to follow: Each flashing should overlap the one listed below by at least 75 mm (3 ), but not be visible below the shingle top lap. Insert each step 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 rectangle-shaped fit and style, roughly 250 mm (10) long and at least 50 mm (2) broader than the face of the shingle being used. For instance, when utilizing metal flashing with shingles with a normal 143 mm (5 5/8) direct exposure (such as traditional 3-tab shingles), the size of the flashing will be 250 mm x 200 mm (10 x 8).

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

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Put it so the tab of the end shingle covers it entirely. Protect the horizontal flange to the roofing system deck using two nails. Do not fasten the flashing piece to the vertical wall. This will enable the flashing piece to move individually of any differential expansion and contraction that may happen between the roof deck and the wall.

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Make certain that the tab of the shingle in the 2nd course will cover it completely. Protect the horizontal flange to the roof. The second and being successful courses will follow with the end shingles flashed as in preceding courses. Once everything that goes beneath the shingles has been properly prepared and installed, it's lastly time to find out how to shingle a roof.

Initially before you lay the field shingles (" field" referring to the large stretch of roofing within the limits of eaves, ridge and rakes) it is very important to set up a preparatory course of starter shingles which are particularly produced for that purpose. However, even if you fashion your own on-site by cutting basic shingles to size, both serve crucial functions at the roofing's eave.

Expert contractors frequently recommend and utilize starter strips along rake edges in order to yield a straight edge from which all the field courses can start. In addition, these starter strips enhance the roofing system's wind-resistance at the rake. It's crucial to follow the maker's guidelines for the specific roofing shingle since not all shingles have the same direct exposure (the part of the shingle that shows up once set up), balanced out (the lateral distance in between joints in succeeding courses often called 'stagger' or 'edge-to-edge spacing') and/or nail positioning.

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You should put nails in the proper location and drive them flush with, but not cutting into, the shingle. Nailing the shingles properly is vital to the roofing system's wind-resistance. Proper nail placement is also a requirement for the shingles' restricted guarantee coverage. If you've selected closed valleys, they are completed as shingle courses method and run through the valley. asphalt roof shingles.

As shingles are installed on the adjacent roof area, the end of each course of shingles is cut (cut) 2 back of the valley centerline. You've nailed in the last field shingle and you can see the surface line from here. Well done! In this case, the goal is the hip and ridge topping. installing shingles.

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Rather, private ridge cap shingles are used to straddle the ridge and shed thin down either slope. There are numerous ridge cap shingles readily available on the marketplace but, when again, the procedure for installing them is based on the very same fundamental concept of overlapping. For hips, start at the bottom and work upslope.