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Post subject:lineset roof flashings
 Posted: Sep 23, 2006 - 01:27 AM #5266
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Tinner
Joined: Jan 16, 2005
Posts: 15
Location: klamath falls oregon
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| i would like to get some ideas on roof flashings. we have a commercial building with fan coil units inside and heat pumps outside on the roof. what kind of options do i have for a roof jack to run our linesets through. we do get snow and rain here in Oregon so they would have to be " waterproof ". also the building has a metal roof. |
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Post subject:RE: lineset roof flashings
Posted: Sep 23, 2006 - 02:32 AM #5267
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Moderator
Joined: May 13, 2003
Posts: 1354
Location: Waukesha
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We used to make a 4 x 10 box a few inches high and capable of putting an end cap on, the opening on the top would allow us to turn the fittings and penetrate the sides of the box and then seal the cap in place?
The box would be flashed as usual? |
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"If you make your job important it is quite likely to return the favor" Author Unknown
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Post subject:RE: lineset roof flashings
Posted: Sep 23, 2006 - 02:13 PM #5268
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Pro Tinner
Joined: Feb 29, 2004
Posts: 117
Location: Midwest, USA
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| We have used systems similar to the attached pdf. |
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If it's broke, it was like that when I found it.
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Post subject:RE: lineset roof flashings
Posted: Sep 24, 2006 - 10:24 AM #5270
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Pro Tinner
Joined: Apr 17, 2004
Posts: 266
Location: Central Ohio
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| There's always the classic pitch pan. Take a strip of metal similar to the roof material, turn ~1" flange to the inside, surround the linesets and fasten to the roof through the flange, fill with 2-part mix that hardens into a seal all around the pipes. Make any sense? |
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Steve
Blissfully Ignorant Copperhead
www.copperthings.com
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Post subject:RE: lineset roof flashings
Posted: Sep 26, 2006 - 01:53 AM #5271
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Pro Tinner
Joined: Sep 16, 2003
Posts: 213
Location: McEwen, TN.
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steve2--------way back when...............when most commercial roofs were built-up(tar&gravel) we supplied & installed the pitch pockets and the roofer filled them..These metal roofs nowadays,I like those deck-mate
flashings. They really conform to the decking even if you hit a rib.Not talking standing seam here..We also switched to gutter seal which is a butyl rubber compound..Much better than silicone(my opinion)Early 60's
we used a two part mix by Thiocol. Much like gutter caulk..
bordontn |
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Post subject:RE: lineset roof flashings
Posted: Sep 26, 2006 - 06:52 PM #5273
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Pro Tinner
Joined: Apr 17, 2004
Posts: 266
Location: Central Ohio
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I was concerned about the mixing of metals with the aluminum flanges on the deck-mate boots. The mix we used most recently tho was a two part made to be compatable with EPDM roofing material. It turned into a rubber like mass.
However bordontn, the thing I like best nowadays is how little I have to worry about roofing matters!! |
_________________
Steve
Blissfully Ignorant Copperhead
www.copperthings.com
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Post subject:RE: lineset roof flashings
Posted: Sep 27, 2006 - 12:13 AM #5274
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Pro Tinner
Joined: Dec 14, 2004
Posts: 201
Location: Illinois
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Some curb companies can make curbs that have the same profile as your roof.
Pate curbs has a nice plastic top that fits over a standard 12 x 12 or so roof curb with rubber covers for the portals on top.
The silicone boots that are screwed down also seem work well. Try to place it on a flat spot.
Do not use silicone sealant. Polyurethane is the way to go. Make sure that what you choose is UV stable. Plenty of info on caulking compounds at www.sealantsandcoatings.com |
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