Q: We had a new roof installed on our house in the Sierras. The roof is a 12-in-12 pitch (45 degree) and is approximately 17 squares (1,700 square feet).
We contracted for a 30-year Elk brand composition roof with 30-pound felt underlayment. The instructions require a ridge vent system, without which the manufacturer's warranty would be void. We told the roofer this.
There is full wood sheeting on the roof. The instructions require a 3/4-inch opening on either side of the ridge beam to allow air flow. more...