Here is an e mail we received with pictures of a custom 4 inch vent cover we made. We are the only company that makes a 4 inch vent cover or shield.

“Just installed the units and they look great and fit perfect.
I am including some shots for your view.

We just replaced the roof. It was only 12 years old. The squirrels had done so much damage to the air vents. That allowed the rain to get in under the shingles rotting the wood underneath. I can’t believe the amount of wood that had to be replaced. The total job cost 11,000 dollars.
The roofer made it sound like it was just inevitable. If we didn’t cover the vent stacks it would happen again. I guess the next point to make is that our house being built in 1948 contains extra wide vent stacks. No one else could create these covers for us except your firm.
I am very thankful that we found you and you were so willing to work with us and with our uniquely sized vent stacks.
Thank you also for cutting them again once we understood the importance of identifying the pitch.

Good luck with your business. Once this catches on, I can see this being another standard in the roofing design. It just makes sense to protect your investment. “