This roof is 8 years old and some shingles were blown off by the massive Ike hurricane in Houston. One day after the incident, we immediately had a contractor temporary covered it with some new shingles instead of using the ugly blue tarps to buy us time to evaluate our roof fixing options.
More facts: about 15 of the 25 tabs (this is a 33.4 squares roof) were being removed from wind-related looseness (rather than totally blown off the roof, which are about 10 tabs). Of the blown off ones, the black roof felt was still there to protect from water penetration. There was no leaks. With that history discussed, we want to explore our options. One option is a layover with a 30-yr and 130 MPH laminated-type shingles since the existing shingles are:
a) still in good condition (see pics),
b) is flat
c) not brittle nor crack.
With those variables, we concluded its substrate is a good candidate for an overlay. So here are the questions for the pros on this board:
1) Do you agree it is indeed a good candidate for a layover? Yes, money saved does play a role since the insurance $ net us only $2,000 after depreciation and deductible.
2) If so, how do we do the valley flashings? Do I tear of the tabs of the existing valley and reflash or lay the metal flashing over the existing shingles and the new shingles over the new flash?
I hope I give enough information to help you help me. Thanks for your inputs.
More facts: about 15 of the 25 tabs (this is a 33.4 squares roof) were being removed from wind-related looseness (rather than totally blown off the roof, which are about 10 tabs). Of the blown off ones, the black roof felt was still there to protect from water penetration. There was no leaks. With that history discussed, we want to explore our options. One option is a layover with a 30-yr and 130 MPH laminated-type shingles since the existing shingles are:
a) still in good condition (see pics),
b) is flat
c) not brittle nor crack.
With those variables, we concluded its substrate is a good candidate for an overlay. So here are the questions for the pros on this board:
1) Do you agree it is indeed a good candidate for a layover? Yes, money saved does play a role since the insurance $ net us only $2,000 after depreciation and deductible.
2) If so, how do we do the valley flashings? Do I tear of the tabs of the existing valley and reflash or lay the metal flashing over the existing shingles and the new shingles over the new flash?
I hope I give enough information to help you help me. Thanks for your inputs.
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