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Post by lincoln on Nov 4, 2015 17:27:31 GMT -5
I agree on building a second free standing wall. I'm doing something similiar in my basement. Metal stud set 24" OC filled with non faced insulation. You want the entire assembly to breath so trapping moisture behind that wall is a bad idea. You'd probably be better served using some type of air barrier on the inside behind your Sheetrock and definately not on the backside. Would you put a Damp Proof Course under the metal bottom plate, rizzoa13?
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Post by rizzoa13 on Nov 4, 2015 19:47:52 GMT -5
As in something like a foam gasket used when wood touches block? I've never seen it used but I'm sure it wouldn't hurt. If nothing else the gasket being compressed down when the bottom plate is screwed would make a nice air seal, why not!
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Post by lincoln on Nov 4, 2015 19:53:49 GMT -5
I guess a bead of silicone or sikaflex would do the same thing?
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Post by holmz on Nov 5, 2015 4:56:47 GMT -5
They use a plastic deal in Aus like a hard textured sheet that is ~100, 125 or 150-mms wide between slab and bricks. I suspect between a slab and studs also prevents "rising damp".
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Post by rizzoa13 on Nov 5, 2015 6:37:03 GMT -5
Yup some silicone would sort you but its my a big deal of you don't. When I re-did my upstairs i drywalled it really tight to the floor and caulked the drywall to the subfloor. It's damn warm up there even in the middle of winter so maybe there is something to be said for all the air sealing.
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Post by toomanytoys on Nov 5, 2015 7:44:34 GMT -5
.......... Do you think that the shrinking phenomenon applies only to XPS, Jack? Red, I'm not an expert in this area; it was an interest of note as this product is in my field of vision. DuPont says it's both in it's literature, and anything posted by D would have passed through lawyers hands or approved by people who would have had serious training as to not state anything that would invoke a lawsuit, so I think they have data to back up their statement. Now, having a career in an industry that could be termed plastics, we had to deal with swell, shrink, and growth (permanent change in size) so I can see the process happening. Some of the details refer to long term installations, and that could not only bring the point of long term aging, but the manufacturing process and formulations. Every company is continuiosly in R&D mode, either for improvement, cost reduction, or environmental compliance. And industry had to deal with ozone depleting gasses some time back. Remember the foam on the space shuttle disaster had been reformulated before its launch. So what is being made today may be fine since some companies are stating they have changed the process to avoid the shrinkage issue. Long term aging is tough to test for, other then putting it on the shelf and waiting a decade. We actually used to do that, but it was for understanding the product as formulations changed multiple times before the shelf ever would have been checked. The shrinkage may just be a spotty issue - company, product, or time frame. So far we just have these comments and I expect that should the problem be widespread and problematic there would be industry and government red flags going up everywhere. I wasn't trying to throw a red flag up with my posting hence the word grumbling in my narrative, but the use of house wrap rather then tape may be a good caution. So could layering with staggered joints although more labor intensive.
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Post by lincoln on Nov 5, 2015 17:11:46 GMT -5
Started on the walls last night. Set out the 92mm bottom track, with my new laser. Great laser, build quality is heaps better than the one it replaced. Came with glasses and receiver, in an aluminium case: Then fixed it down, with nylon anchors. Cut the 90mm studs to length, stood them up @ 450mm centres, screwed to track, sat on the top track, screwed in place. Braced the top of the walls back to the garage frame with off cuts of stud. All dead straight, and plumb. Will fill with insulation, then line with...something. At this stage, I'm thinking 12mm MDF. Will think about it while I finish the framing, over this weekend.
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Post by rizzoa13 on Nov 5, 2015 20:11:40 GMT -5
Pretty funny i started framing my basement "indoor play park" for my daughter today too. I used my new stabila laser for the first time too, the odds!
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Post by Red on Nov 5, 2015 23:21:07 GMT -5
Well, fellas, we should start a thread [somewhere] on laser products in use in the construction industry. We've made an investment into this type of product and I, for one, would love to share our experiences and learn more about the latest and greatest.
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