This is one of many steep roofs that I have taken on through the years. It's got 7/16" oriental strand board over 1" rough cut laid out for slate roofing. The shingles are by Owens Corning with Titanium UDL30 underlayment and two rows of Grace Ice & Water Shield. We install two rows of IWS to extend 2' into the living space. It's got baffled ridgevent to keep a low end positive pressure at all times. Now the homeowner removed the insulation off the rafter cavities and her short term goals will be to vent the soffit. Other than being a steep roof, ALWAYS Tie Off. Your family will love you for it. Chad Shirey Oil City, Pa 16301 (814)671-7858
I Love Steep Roofing!