Edit answer for another 34 minute make sure you need a new boot may just need a bit of bitumastic caulk if it is leaking a bit at the duct contact as they commonly do as the rubber gets older.
Replace boot on roof vent.
The perma boot can also be used as a very effective preventative maintenance product to guard against future roof leaks and the resulting damage to sheetrock insulation paint and hardwood floors etc.
Step 1 clean pipe and boot.
Obtain another rubber seal.
Existing pipe boot repair and preventative maintenance the perma boot is a gasket less two piece pipe boot repair system designed to permanently repair the most common type of roof leak the leak around the vent pipes that penetrate your roof.
You will need only a few materials and they will all be available at your local home improvement store.
Perma boot costs 16 to 20.
I purchased a plastic flashing assembly from the local home improvement store.
There s no need to lace the flashing pan into the shingles since the boot and bell of the new flashing will shed water around the damaged part of the old one.
On the boots if you have metal roof jacks with rubber boot seals on top with many models the rubber seals can be popped off and replaced without removing the metal part and there are also slip over boots that can just nestle down over the existing damaged boot and overlap the top of the jack but contractor would have to look at it and see then go get parts so if using a contractor probably cheaper to just have him bring new ones right off unless quite close to his supply wholesaler.
The collar and sleeve looks like the new construction version without the roof flange slides over the plumbing vent pipe and damaged boot flashing.
The best way for a do it yourselfer to repair a roof boot is to seal the existing boot and apply a new rain and repair pipe collar.
Use common sense safety precautions and make sure you can.
They also make a boot flashing repair version.
Now it is time to work on the roof.
If split then yes it needs replacing though a good wrap with waterproof duct tape or bitumastic caulk will keep it intact and dry until a roofer can fix it.
Vent pipe rubber boot repair step 1.
Trusted roof boot installation replacement in la plata waldorf.