I’ve done a LOT of roofing in my younger days. Usually if you tar the first layer down, they are pretty good. My cousin in Cape Breton is doing my camp this spring. In C B now , they tar the whole back side of the shingle before it goes on the house. Just for the wind down there. They are Sow West winds. My brother in Margaree said it’s normal to have winds of 80 to 90 mph , he said they don’t start to worry until it gets above 110 mph. He said last fall they had , sustained winds of 90 mph , he said the trees were laced over but all came back. So yeah , we get wind. Good luck you guys.normally only have issues with the older siding now when we get 50-100mph. when i got the place water come in everytime the ice and snow would melt, i went through and tore off million years of old roofs tar and roll. i got mid grade architectural shingles from from HD almost two pallets worth(house garage and 12x24 shed), mostly done myself. but the first row is what you have to worry about with that which i tar'd two layers of shingles over felt and two 3ft rows of water and ice proof ice shield, so even when you loose a shingle or two which is all that has happened the water/snow is still not going to ever get in, till i replace it in the spring. really after they get a few years they stay pretty good up to 100, i went through and put 3.5 inch screws in the siding that has come off too havent had any problems after that but, house was built in 1850 there are about 18 layers of roll and ceder on the sides too, tough to find anything to screw to
Caper