Wind Mit - Roof Geometry

Hey guys, not sure how to rate these little roofs. Any help is appreciated. My thoughts are the blue lines I rate as hip footage and the yellow non hip. Thanks.

There is nothing hip about those two roofs. I would call them shed roofs. So for sure use the perimeter for your measurements.

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Thanks fo the reply Les, what about for the first pic that it is not an enclosed space? Just don’t count any footage at all for that one?

Its not just attached to the fascia so I’m counting that too. Maybe others feel different?

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That upper roof looks large, so are those the only 2 areas? Looks like it might still make the 90% rule.

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Yes the whole top is hip for sure

I was going by this part. Seems like an open porch attached to the wall?

I get it but like I said does it matter in this situation? What are the measurements.

If this roof gets torn off would there be any damage to the interior, that’s your call.


I would get the perimeter measurement, and see what the percentage is when those shed roofs are added up. If it’s close, then sharpen your pencil a bit and see if it still works.

I find many homes, at least here in The Villages are built to the 90% hip rule to maximize the amount of gable they can put on. Typically they are decorative gable/dormers over the front door or perhaps the garage area. That may be what’s going on here…they just played around with the 10% so it won’t make any difference.

Thanks for the reply. I wasn’t so concerned with the total % in this scenerio as this is my friends house and just thought it was interesting to think about. I haven’t even looked or counted the main roof. Would it be safe to say use the blue + yellow section as part of the perimeter for non hip, while not including the sections over the porch at all in the calculation?

If you give me a location of the home, I’ll google Earth it and measure from space.

I would only do “creative” measuring if the home was just over the 10% threshold and by just over, I mean a few feet, not 5% or something. If it’s way over, it loses the hip discount.

The first picture doesn’t even look like a real roof. That looks like a decorative faux finish on the front. Is that one of those convoluted balconies that there is no access to and has a drain in it, just to cover the front entrance?

As far as the other one, that looks like a garage so you would have approximately 4 ft on one side, and 4 ft on the other side that would be a non hip feature. Is the perimeter going to be 90% with the 8-ft?

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Hey Eric, yea on the first one I’m not going to include it in the calculation because it is a covered front porch. On the second I’ll do the 3 feet on each side + 12 for the long side (blue). I’m not sure what the total footage would be as that wasn’t my main concern. I was wondering if I had to include it or not which it seems the answer is yes.

I was reading about these side roofs, I didn’t even know their names. Thanks.

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Again, why not? Is this area not structurally attached?

Because of the wording on #5


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The question is; is it structurally attached and that will answer whether or not it’s counted. IMO yes it is but again its your call.

I personally would not count the first picture. It is just over a patio, and not structurally attached to the attic.
The biggest determination is “would it rip a hole in the attic if it was torn off”… And this wouldnt, so I would not include it.


I went to required classes for My Safe Florida Home training by Bill York the engineer. I was a supervisor.
Open porches do not count on perimeters.