Nails for wooden chimney chase metal “top hat”
edwardh1
| Posted in General Discussion on
I have a prefab fireplace and the flue pipe goes inside a wooden 3×6 approx 2 storey high chimney chase , on the side of the house, that has a metal top hat” that the flue pipe goes up under and through. . When it was replaced due to age 5 years ago, I caught the builder guy lying to me, to my face (a whole nother topic)— he said the put eight fasteners all around the 4 sides of the metal top hat. I had watched him doing it, he never moved his ladder, and did not get onto the house roof. I called his boss and he came over and we went on the roof – you could take a yardstick and push up on the top hat– the side that had the 2 screws in it acted like a hinge and the yardstick could lift the whole rest of top hat-
as could a 45 mph wind which would blow the top had off and soak my house and living room side. they fixed it but I dont know how well.
So I thought about that when Dorian went through .
how many fastners do I need and should they be screws or nails and with what size heads, A top hat could easily see 100 to 140 mph wind- seems you would need more than a regular small nail head- that could pull thru the galvalume metal?
as could a 45 mph wind which would blow the top had off and soak my house and living room side. they fixed it but I dont know how well.
So I thought about that when Dorian went through .
how many fastners do I need and should they be screws or nails and with what size heads, A top hat could easily see 100 to 140 mph wind- seems you would need more than a regular small nail head- that could pull thru the galvalume metal?
what say you Finehomebuilding brain trust- screws? nails? washers? how many on each side? Thanks . would an architcct specify?
now it seems to have 2 nails , together, at end of each side, so 4 nails on the long side, but no fastners anywhere else, that is, none in the middle of the 6 ft long sides. and looks from the ground like 6 penny common nails (small heads.)
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Replies
I would use SS screws rather than nails. No one has ever complained that they had too many fasteners in anything after a hurricane. I'd put 6 on each side and 2 or 3 on each end.
and I guess I need the type screws with the washer as part of the head?
this subject I cant find anything on, on the web.
if anyone knows where more info might be, please direct me
thank you
Waferhead screws, come in stainless and self drilling through metal.
anyone else?
In florida does Miami Dade have any requirements on this? seems like the hurricane winds would increase the need for more nailing, nails or screws?