We have received some enquiries about roof pitch and how Critter Quitters fit on these. Many get hung up on this being concerned with “will it fit.”
Let’s clear this up. A normal roof is basically a triangle. Pitch is simply the measurement of how much it rises in a foot of horizontal run. So if a roof rises 12 inches in 12 inches of horizontal run, this means it’s a 12 pitch roof, and also means that it has a 45 degree angle. More important to note is that this also means that a 6 pitch roof (the vast majority of roofs in the Southern states that use lead flashing) rises 6 inches for 12 inches of horizontal run, and is a 22.5 degree angle. A 3 pitch roof would rise 3 inches for 12 inches of horizontal run, and is an 11.25 degree angle.
So how does this fit the discussion? Because a Critter Quitter, when mounted, has the same triangle relationship at its base around your vent as the roof. We cut the F model with a 0 pitch for roofs between a pitch of 0 and 3, and our S model is cut to a pitch of 7 (basically a 26 degree angle) to fit roofs between 4 and 10 pitch. Size A has a 3 ½ inch outside diameter, so that means that if you put a S model on a 4 pitch roof or a 10 pitch roof, it’s going to have a small gap on one side of 3 pitches, or 11.75 degrees. This means a gap of maybe ¾ inch, which is negligible on a roof and not accessible by squirrels. This is the largest gap you will see. As it’s installed on the 5-9 pitch roofs, which are very common, this gap decreases with 7 having no gap.
So don’t worry about pitch, its covered. (no pun intended.)