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I’m just in the process of re-roofing a 2.5/12 pitch rancher and changing from tar and gravel to 3 tab. The wife decided we didn’t like the slope of the roof and wanted to increase the pitch on the top half to add some street appeal. I think it’s called a mansard roof but not sure. Anyway, the problem is the vent stacks no longer extend through the new roof and I’m wondering how to extend them. Most are 2 inch copper and one or two are cast iron of a bigger diameter. My thought was to use black plastic pipe with compression couplings as the only function is to vent gasses. Is this acceptable or do I need to sweat new copper extensions on, and what do I need to do with the cast iron stacks.
Additionally, although WE decided WE didn’t like the pitch of the roof, why have I been the only one one the roof for the past week humping wet 2 x 8 fir and 3/4 fir plywood?
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Not a mansard, gull wing is more like it for name.
go to plumbing supply with your question. likely they'll sell you rubber clamp-on couplings.
congratulations, you're learning what marriage is all about.
*You should be able to use either ABS or PVC pipe to extend the vents through the roof. Use the same size as the existing vents and make sure the pipe is for drainage, waste and vent (DWV). Use Fernco or Mission couplings to join the new to the old. When buying the couplings be sure to get them sized for the type of pipe you're using - PVC and cast iron pipe are the same outside diameter, but copper has a smaller OD than cast iron, ABS or PVC of the same ID.
*I might, after two years without a break working on other peoples' houses, take a month off to actually work on mine. I plan to lay bamboo flooring over concrete slab. The plan thus far is to glue 2x4 pressure treated sleepers with pl 2000 or other construction mastic, or cold asphaltum to the slab, cover the rest of the exposed concrete with a couple layers of glued on 30# felt, lay some 1-1/2" styrofoam insulation in between the sleepers, lay 3-1/2" strips of bituthene on top of the sleepers, so the flooring nails will seal up, cover all this mess with thick plastic sheeting, and nail up the t+g bamboo. The feedback I need is- am I doing to little, or too much? are there better ways? and: opinions on bamboo as flooring. I have seen some beautiful floors done and have been told (by salesmen) that bamboo is the strongest, the most stable, etc:, etc:. but recently, an old flooring guy told me it comes apart and splinters easily. what do you hear? oh, yeah, we live two blocks from the ocean- is that a factor?
*"Use the same size as the existing vents "Ummm, I i thinkthere have been changes in those standards, and vent stacks should be 4" minmun where they project through the roof. The idea is to prevent blockage of the vent stack from hoar frost (condensation of the water vapor at the top.The rules are likely different in warmer climates.
*You're right about the vent sizing, Bob.Do you have to go through the roof? Will your local code allow Studor vents in the attic?Andy
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I'm just in the process of re-roofing a 2.5/12 pitch rancher and changing from tar and gravel to 3 tab. The wife decided we didn't like the slope of the roof and wanted to increase the pitch on the top half to add some street appeal. I think it's called a mansard roof but not sure. Anyway, the problem is the vent stacks no longer extend through the new roof and I'm wondering how to extend them. Most are 2 inch copper and one or two are cast iron of a bigger diameter. My thought was to use black plastic pipe with compression couplings as the only function is to vent gasses. Is this acceptable or do I need to sweat new copper extensions on, and what do I need to do with the cast iron stacks.
Additionally, although WE decided WE didn't like the pitch of the roof, why have I been the only one one the roof for the past week humping wet 2 x 8 fir and 3/4 fir plywood?