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Any one know what the "typical" or maximum gap in the plywood should be for venting on the peak of a garage roof??? It is a wood garage with vinyl siding and a metal roof. The gap in the plywood at the peak of the roof is at least five inches or more. On a metal roof website, I saw a picture that said it should be at least 1.75 inches. Also our construction crew apparently forgot the foam to seal the vent as leaves and snow are blowing into the garage. Also apparently the worker had never done a metal roof as none of the ribs line up, and the rake trim?? down the side is screwed right into the side of the rib, instead of the top - there is also a big bulge in the center of the roof - don't know if he started on the sides and it didn't meet well in the middle. Plus lots of "dents" as the person on the roof was not walking over the two by four underneath. This is my parents garage, and it was top dollar (I feel they took advantage of a retired person). They still havn't put all of the screws in one side of the garage roof. They also supposedly "fired" some of the crew that worked on this garage (that still doesn't make our garage OK nor were we refunded any money). Located in MN.
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I am sorry to hear about your experience.
I would suggest meeting with the contractor and a representative of the manufacturer to see if some of these issues cannot be resolved.
The size of the ridge opening is somewhat dictated by the type of ridge vent being installed. The opening should not be so large that it prevents the roofing from being fastened near the ridge. I know that, with the ridge vent my company produces, we like to see an opening of 2" on each side of what would normally be the peak.
As far as the seams not lining up on both sides of the ridge -- that could be the cause of roof geometry though it could also be caused by sloppy workmanship,
As far as the dents, one thing that ought to be confirmed is that the roof panel installed was appropriate for installation over purlin rather than solid decking.
As far as snow, etc. getting in at the ridge, it could be a case of improper or incomplete installation. However, there could be problems occuring with not having air intake such as vents in the soffit which is causing air to be "sucked" into one side of the ridge vent and resulting in pulling in this debris.
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thanks for your reply
we called VicWest this morning and they said the gap on that ridge cap should be 1 5/8. I saw some other drawings of ridge caps that said from 1 inch to 1 3/4 inches. There also should be a "foam" strip along both edges. (when the lights are on, you can see right to the peak of the roof)
As far as the dents from installing the roof - I am not sure what "purlin" is - the roof was covered with chipboard and it is 1/2 inch thick - there were "clips" that held the sheets of chipboard together - some are missing and some are already broken.
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What I was referring to as "purlins" were what you called the 2 x 4's that the installers apparently didn't walk on. Now I'm confused! Are there 2 x 4's on top of the chip board?
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there are 2 x 4 rafters - the chipboard is on top of it - the clips I am referring to are centered about halfway between the two by fours - when someone steps in the middle of the board (without the rafter below), part of the clip breaks off (I found pieces of the clips on the garage floor) - also, some of the clips are just plain not installed at all.
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Gentlemen:
My house has a wood shake roof laid on top of skip sheathing with slope of 4 in/ft. In 1976 we added a room with flat roof started almost at the end of the original roofline. The city required us to lay the new roof on plywood. Now the roof is leaking at the joint. I plan to construct new rafters from the top of the roof. I calculated that the new slope would be 2.3 in /ft. 1) Can I use stone coated metal roof shake for the new slope? If I could, and the city requires us to lay the metal roof on plywood, 2) is there a way to solve heat builds up between metal roof and plywood? I live in Southern California where temperatures could rise above 106 degrees.
Thank you.
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2.3:12 is very low slope and I am not aware of any shingle or shake style metal roofs which can be used at that pitch.
As for the heat situation, you really need to get some active ventilation with both intake and exhaust. A good way to do it is with intake in the form of siffit vents and a ridge vent to exhaust. However, you will need to find a ridge vent which works at this low pitch.
11/8/2003
Isaiah Industries, Inc.
11/8/2003
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11/10/2003
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11/12/2003
Isaiah Industries, Inc.
11/12/2003