My rural home has a 12" corrugated steel pipe that serves as a culvert, and it runs perpendicularly at the end of our asphalt driveway. Many UPS and Amazon truckloads have run across it and now, one end of that pipe has been squashed so that that it's quite elliptical, and no longer round, as when new. I have about 5.5" of clearance at this squashed end, so I think I can push a scissor jack into the end of the squashed pipe, and open it. Maybe I can force a 2x4 vertically to keep it open; I'm sure no matter how often I ask the drivers, they will still run over that section of culvert. Scissors jacks are not too expensive, and instead of a 2x4, I'd be willing to leave the jack in place, but I think it'll catch all kinds of debris and negate my having opened up the pipe in the first place. Does anyone have any experience in repairing culvert pipes that have been compressed and flattened out of shape? Thanks.

I would appreciate some comments on a reroof project by a local roofing company. The property has a sloped roof in the main house then a flat roof extension in the back. The sloped roof will get shingles and the flat roof will be hot mopped with asphalt top layer. Today was demolition, finished all of the flat deck, tincap of the sloped roof portion, wait for inspection of the tin cap. I had lots of leaks where the sloped roof and the flat deck meet, lots of rotted wood (from leaks, from termites) in that area. Here are some work in progress pictures. My first question is they applied some silver colored reflective sealants on along the seams of the asphalt roof covering. I noticed there are some seams that's not 100% sealed closed. When I inquired about this the foreman told me they do not need to be sealed because there are two layers of felt paper under it and two layers of hot mop and it will not leak. So these seams are OK? As for the shingled roof, can someone explain to me what is actually the waterproofing layer? They have two layers of #30 felt down, with thousands of tin caps. Is this water tight? When they put shingles down, there will be another thousand nails penetrating the shingles and the felt paper. My old shingles leaked where nails went through. Now I am doing the same again. How long will this roof be leak proof? The roofer said he can paint over the entire shingles roof with a sealant for an additional cost, but somehow I think this is a bad idea. Finally, I walked up to the roof with a pair of shoes that's one week old. I was careful to not step on any tar or sealant but I think I stepped on paper that someone else had previously stepped on and he had tar on his shoes. Now my shoes have sand and dirt glued to it because of some tar. Is there anything I can use to clean the bottom of my shoes? Acetone?