Installing A New Roof: The Systems Beneath Your Shingles

Published Nov 04, 20
5 min read

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When the shingles are being applied, lay them over the valley flashing, trim completions 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.

Install metal flashings where shingles meet walls or chimneys, too. Ice and water protector membranes work well to flash and assist safeguard around skylights, dormers, turbines and other difficult roofing locations. Apply flashing products in show with the shingle installation treatment, with both the flashing and the shingles set up to interact to safeguard around the joint locations - installing shingles.

When using the new shingles, each shingle course will be covered by a step flashing. Metal Step Flashing Pieces There are two basic rules to follow: Each flashing need to overlap the one listed below by a minimum of 75 mm (3 ), however not show up below the shingle leading lap. Insert each action flashing in a 75 mm (3) large application of asphaltic plastic cement, and nail in location.

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The metal step flashing pieces are rectangular in shape and design, around 250 mm (10) long and at least 50 mm (2) wider than the face of the shingle being used. For instance, when using metal flashing with shingles with a typical 143 mm (5 5/8) direct exposure (such as standard 3-tab shingles), the size of the flashing will be 250 mm x 200 mm (10 x 8).

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

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Place it so the tab of the end shingle covers it completely. Protect the horizontal flange to the roofing system deck using 2 nails. Do not fasten the flashing piece to the vertical wall. This will permit the flashing piece to move independently of any differential expansion and contraction that may happen between the roof deck and the wall.

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Ensure that the tab of the shingle in the 2nd course will cover it completely. Secure the horizontal flange to the roof. The 2nd and prospering courses will follow with completion shingles flashed as in preceding courses. When whatever that goes underneath the shingles has been appropriately prepared and installed, it's lastly time to discover how to shingle a roofing system.

Initially before you lay the field shingles (" field" describing the large stretch of roofing system within the boundaries of eaves, ridge and rakes) it is very important to install a preparatory course of starter shingles which are particularly produced for that purpose. But, even if you style your own on-site by cutting standard shingles to size, both serve important functions at the roofing system's eave.

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

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You must position nails in the correct place and drive them flush with, however not cutting into, the shingle. Nailing the shingles properly is critical to the roofing system's wind-resistance. Correct nail placement is likewise a requirement for the shingles' minimal guarantee protection. If you've picked closed valleys, they are finished as shingle courses approach and go through the valley. asphalt roof shingles.

As shingles are set up on the adjoining roofing location, the end 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 goal is the hip and ridge topping. house shingles.

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Instead, private ridge cap shingles are utilized to straddle the ridge and shed thin down either slope. There are numerous ridge cap shingles readily available on the market but, when again, the treatment for installing them is based on the exact same fundamental concept of overlapping. For hips, begin at the bottom and work upslope.



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