I will be having my house re-sided with either cedar lap siding or cedar shingles (currently it has cedar shakes that are poorly installed (not sufficient overlap.) I have several questions.
#1--the sheathing underneath is shiplap (looks like 1x8 boards). Is this significantly less strong than plywood sheathing? Would it be worth my effort to have a layer of plywood installed over the top of this shiplap sheathing? Also, this shiplap sheathing is installed horizontally...I've heard its supposed to be diagonal...is this a bad thing?
#2 When the siding people are installing the siding (and possibly plywood), how on earth can they avoid the posibility of piercing a wire or plumbing fixture?