I have a front porch made of one full inch tounge and groove, 10 ft wide. They were stapled down (I think that's the problem). There are about three places that are buckled all year round. Now more than in the summer. I've tried pulling them down with screws from underneath. Didn't work. I thought about running a saw kerf between them except the door threshold and the house siding won't allow the saw to go the entire length of the boards. I also tried pushing down by using a house jack between the porch and the ceiling. Any thoughts??