Roof Penetrations Should Be Flashed Properly
Anytime you see this amount of "sealant" (some people refer to it "tar") you know there was a problem with the flashing. Let's just preface this by saying if a roof is properly flashed, you should see no sealant. This boot flashing is made of aluminum and rubber. The aluminum goes under the shingles above the vent and above the shingles below the vent so the water sheds. Installed properly the rubber "boot" slides around the PVC pipe and provides a waterproof seal. My guess is that this boot flashing wasn't properly installed or was damaged or nicked during installation. The homeowner probably had some water intrusion to the second floor sheetrock ceiling below during a heavy rain and overcompensated with a large amount of sealant to fix it. Ironically, the shingles were still in great shape with many years of life remaining.

You think your deck can handle the weight of that that hot tub? Better speak with an engineer first!




