I have 80 year old home with a damaged roof due to hail with 20 yr 3 tab asphalt shingles over an older wood shake shingle. Should I tear off just the asphalt shingle or should the wood shakes come off also?
If I tear off the wood shake should I tear out the slats also and replace with sheating or leave the slats in place and shingle to them?
An advice will be appreaciated.
Thanks everyone for your advice. I’m going to do what Lefty recommended.