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Old 05-06-2014, 08:17 PM   #1
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Women & a Greenhouse


My plans for the GH is calling out for a 1x8 ridge board with 2x4 rafters. Always thought you go up the next size from the rafters and in this case a 2x6? A 1x8 seems a little flimsy but perhaps it is because the window/vents attach to the ridge board. Can I double up on the ridge board? Any thoughts on the right way to go about this??
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Old 05-06-2014, 08:40 PM   #2
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What is the length of the rafter and the roof pitch?

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Old 05-06-2014, 08:46 PM   #3
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Rafters are 5'11" and roof pitch is 10/12
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Old 05-06-2014, 09:04 PM   #4
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A ridge board is actually not needed unless there are no ceiling joists or something to tie the outside walls together, to keep them from spreading. Rafters can be installed without a ridge board all together. What a ridge board does is keep the rafters in an upright position until the decking can be applied. A ridge board just makes it easier to frame.

If there are no ceiling joists, or something, that will tie the walls together to keep from spreading, then a ridge board will need to be replaced with a supported beam that will support the rafters and keep the pressure off the outside walls. You will be fine with a 1X8, but if you feel more comfortable using a 2X8 that will be fine also. Usually with 2X4 rafters a 1X6 or 2X6 is used instead of a 1x8 or 2x8.
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Old 05-06-2014, 11:41 PM   #5
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Might check locally if a permit is needed, I read that your location some HO's cannot even change out a window themselves due to high winds/liability...

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Old 05-07-2014, 12:27 AM   #6
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For 10/12 pitch go with BigJim's comment above. But, being a perfectious (i'm sometimes a pain in my own a__) i would go with 2 X 6 for the rafters especially if you sometimes get a lot of snow
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Old 05-07-2014, 03:42 AM   #7
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Quote:
Originally Posted by curtd View Post
For 10/12 pitch go with BigJim's comment above. But, being a perfectious (i'm sometimes a pain in my own a__) i would go with 2 X 6 for the rafters especially if you sometimes get a lot of snow

The OP being in Navarre, Florida. Probably never has to worry about snow on the green house.
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Old 05-07-2014, 06:26 PM   #8
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Thanks Big Jim and everyone else. Very helpful info. No snow here is right. Had enough of that when I came down from Illinois. Traded the snow for white sandy beaches!! K, thanks again guys. God Bless.
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Old 05-07-2014, 09:44 PM   #9
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Originally Posted by beenthere View Post
The OP being in Navarre, Florida. Probably never has to worry about snow on the green house.
Yep, I missed that one

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