Model # PB 312-4BK

Internet #203310754

Perma-Boot 4 in. Inside Diameter Black New Construction or Reroof Thermoplastic Vent Pipe Roof Flashing


4 in. Inside Diameter Black New Construction or Reroof Thermoplastic Vent Pipe Roof Flashing

$1884 /each
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Frequently Bought Together

Product Overview

The Perma-Boot 312 is a high performance vent pipe flashing designed for new roof and re-roof applications. The patented design allows for use on roofs pitched from 3/12 to12/12. Compatible with PVC an all other vent pipe types. A nailing flange is incorporated for traditional fastening to roof deck. Avoid using old fashioned vent pipe flashings that utilize rubber or neoprene gaskets to seal out water which fail in a matter years allowing water to enter the home and cause damage to sheetrock, insulation, paint and hardwood floors etc. The Perma-Boot will stand up to all weather extremes and is warranted for the life of the shingle. Available in black, brown, weathered wood and gray to match your shingles. Made in the USA.

  • Provides permanent protection from costly vent pipe gasket leaks
  • Designed for all standard roof pitches - 3/12 to 12/12
  • Simple installation with nailing flange for fastening to roof deck
  • Suitable for asphalt shingles, wood shake, slate, terra cotta and composite roofing materials



Pipe diameter (in.)
Product Thickness (in.)
Product Width (in.)


Color Family
Flashing Type
No Caulk Vent Pipe
Product Weight (lb.)
Roofing Product Type
Vent Pipe Flashing

Warranty / Certifications

Manufacturer Warranty
Lifetime of shingle warranty

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Customer Questions & Answers

Will this fit a 4" Cast Iron Vent Pipe

I have a 4" inner diameter, 4-1/4" outer diameter cast iron vent pipe - will this fit it???
Asked by: Theo
From my understanding the Perma-Boot is not meant for cast iron pipes. I highly suggest that you contact them directly via their website. Google Perma-Boot to find them.
Answered by: VeganPower
Date published: 2017-07-02

Does it come with the bottom flashing too? Everyone in the picture is included?

Asked by: nick
Yes, the flashing is made to the boot. Meaning it is a single piece. So there isn't any way for water to get into places it shouldn't.
Answered by: VeganPower
Date published: 2017-07-02

What is the maximum length of pipe that this product will accommodate?

Asked by: Roofis
Perma-Boot is designed to work on vent pipes that are 11" to 15" tall. Shorter vent pipes should be extended using a typical PVC connector and additional pipe. Vent pipes longer than 13 will need to be shortened to ensure complete coverage by the Perma-Boot. - Perma-Boot
Answered by: VeganPower
Date published: 2017-07-02

Is this in stock at austintown ohio store

Example: I have looked at the manual and can't figure out what I did wrong.
Asked by: Rudy
Thank you for your recent inquiry with The Home Depot, Rudy. This Roof Flashing is online only and is not sold in stores. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot.
Answered by: THDSupport
Date published: 2016-11-04
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Customer Reviews

4 in. Inside Diameter Black New Construction or Reroof Thermoplastic Vent Pipe Roof Flashing is rated 3.8 out of 5 by 6.
Rated 1 out of 5 by from Not as robust as I expected Happy with: PRO#1)timeframe part was shipped to my local home depot PRO#2)when I arrived at the store they immediately handed me the part, instead of them having to search inventory for 20 minutes to find it like I have had to do at other stores Not happy with: CON#1)part was significantly more flimsy than I expected, I have decided this is something I will not put on my house CON#2)part was shipped without proper packaging to secure the part, so the flimsy part was all bent up when it got to me COM#3)my decision to go with this cheap part, I should have instead spent more money considering this is a part that I planned on keeping on my house for decades NOTE1): I did not say I was happy with the price because I won't even be using it due to it not being robust enough for construction in my opinion (I didn't go back to the store to attempt to return the part because I would have take time to drive there yet I will wait til I need to go there for something else) NOTE2): I am a DIY guy and I have never worked in construction (I am an engineer) Quick Summary: I suggest to spend more money on a better design
Date published: 2017-07-05
Rated 5 out of 5 by from Very easy to install, even for a guy like me. This was very easy to install, just as advertised. Boot, flashing, and shingles had been badly damaged by an animal and were completely removed. This was the perfect solution since I was putting in new shingles.
Date published: 2016-09-13
Rated 5 out of 5 by from Have seen this at a Home show, knew it would serve my needs. Recommend it where it's needed. Ni... Have seen this at a Home show, knew it would serve my needs. Recommend it where it's needed. Nice retro fit and repair.
Date published: 2016-12-06
Rated 4 out of 5 by from Don't know yet,but hope it will work It was not hard to install. Hopefully it will work
Date published: 2016-11-22
Rated 4 out of 5 by from Does the job We put up the smaller sizes of this on all our plumbing vent pipes but bought this larger size for a radon mitigation pipe. However this one has the flat foot at the base that the others don't. My contractor had to cut the flat foot off to make it fit. It looks nice and should perform it's designed function. The other sizes get 5 stars. This one only 4 because of the extra work to cut off the flat base.
Date published: 2015-04-21
Rated 4 out of 5 by from roof repair This product fit the needs to repair a worn out flashing. The product was very easy to install without any special tools required.
Date published: 2014-07-22
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