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| Large valley with shingles Leaks take place below when the snow and ice accumulates causing ice dams Water leaks because the shingles are designed to shed the water On a steep roof |
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| Removed the shingles and applied base sheet making sure this turned up against both sides of the valley |
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| Base sheet was nailed down on both slopes under the shingles . |
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| Galvanized metal pan was installed and fastened in place |
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| Made sure this metal pan fastened in place before the smooth modified membrane was installed |
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| Installed the smooth modified membrane followed by the new shingles |
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| Bottom course of the shingles starts about 10 ft away from the base of the valley |
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| We also hand sealed the shingles with high grade urethane based caulk to make sure the new shingles are adhered with the existing older shingles and prevent wind damage |