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A metal roof nightmare.
This metal roof is approx 20 years old and is amzing it is still on the roof. It is a 5 v-crimp, (I believe it is called.
The screws - 3/4" screws placed on the apex of the V. The V is approx 1/2" high, leaving the screw to penetrate the wood below by 1/4"
Some areas screws are up to 36" apart, even on the edges running up the rake. Roof eaves, one screw each V only.
Overlaps - not caulking bead to seal or prevent blowing rains entering under.
Some areas where you have 1 roof comig into another, such as a gable roof meeting into a lower hip roof. The runs of the gable roof, (a 12/12 pitch) are 16', that is a lot of water flow in rains, where they terminate is on a lower pitched porch roof, 3/12 with a hip on it diagonal of the 12 pitch rafters.
The valley metal is approx 18" wide, 6" exposed, leaving 6" under metal of each roof, 12/12 & the 3/12. Again there is no type of seal between decking metal & valley metal.
Decking under metal roof - there is none.
Construction is rafters with 1x4's every 18" for the metal roofing to fasten to.
I was going to add the needed, proper sized screws. Then while up there discovered all the improper, (I believe is improper) installtion.
My questions are:
About 20 years ago, was this a proper method of metal roof installation? (the install over 1x4's)if so.
Can I add the proper joint sealer to the joints, overlaps as well as ends on valley flashing?
Or should it just be all removed & properly installed?
It is on a house 2800 sq ft w/wrap around roofed porches. Gable / hip combo
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Burby,
The screws are located in the wrong place. As far as a sealant on the overlaps, you shouldn't need any. 5-vee laps both vees and usually there is a water channel between the two vees and we have never had a problem with water getting past the two vees. Although if it was flat enough you would.
If you want to keep the roof, I would replace the screws, the neoprene washers are probably deteriorated. Put some more in if you feel like you need it to prevent wind uplift.
The lathes with no decking is done quite a bit. It is not recommended because of condensation issues.
[email protected]
12/11/2008
Or copy this URL: https://www.metalroofing.com/spirit/comment/12431/find/12/11/2008
Or copy this URL: https://www.metalroofing.com/spirit/comment/12432/find/Isaiah Industries, Inc.
12/18/2008
Or copy this URL: https://www.metalroofing.com/spirit/comment/12433/find/