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Laying Down the Second-Story Floor

Bob and Howard Brickman, the homeowner, move to the upper floor of the new addition. When completed, the new roof will match the line of the existing home's roof exactly. I-joists will be used for the rafters. The whole deck of the upper floor was put down using Georgia-Pacific DryPly. This plywood product is made of Southern yellow pine, is very strong and functional, and water-repellant. DryPly is designed to stay dry even when exposed to the elements for up to 30 days. It is ideal for use as floor decking because it is strong and stable. It can be used as a single-layer of underlayment for finish flooring, which saves time and materials for the builders. There are no unsupported edges with this tongue-and-groove plywood, so it is completely stable as a subfloor. Bob talks with Richard Brickman, Brickman's son, about working with the DryPly. The wood weighs about 75 pounds per sheet. The Brickmans use the same foam adhesive that was used to affix the exterior furring strips. This Pur-Stick polyurethane foam adhesive is applied wherever plywood meets the structure. This adhesive increases the stiffness of the structure without damaging the integrity of the EPS board. Bob talks with Peter Conlon from Todal Products about the adhesive, which is gun dispensed for a precise application. Pur-Stick does comes out like a shaving cream and chemically grabs the moisture out of the air, causing it to thicken and increase in strength. The foam should be allowed to sit for five to seven minutes before setting the board or trim. The set time can be reduced by spraying the foam with water on which speeds the absorption rate. The Brickmans use the adhesive to attach the DryPly to the framing, allowing the necessary space between panels for expansion and contraction. The Brickmans use hot-dipped, galvanized nails to secure the plywood because they have a rough texture that helps them grip better. The nailing pattern is every six inches along the edges of the board and eight inches along the intermediate joists. The gable end of the roof is clerestory construction with two shed roofs coming together. The vertical line of the gable will be a wall of glass.
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Clip Transcript For:

Laying Down the Second-Story Floor

  computer-generated transcript - may not be 100% accurate

" Oh boy it's nice and sunny up here. OK so I see what you're saying. -- about continuing the roof -- the existing house all the way across. I mean it's one long run though is it twenty some odd feet. Are actually the rafters here will be about 26 feet five inches and are they going to be traditional lumber now we're gonna use the I joists again for the rafters you can use them for for rafters the other is a design that allows you to actually frame a continuous rafter from the -- down -- don't I don't see exciting to watch OK so now you've got the whole deck down -- using this Georgia Pacific drive -- It really is very good looking stuff isn't it yes very. Very attractive material very highly functional as lawless area in southern yellow pine very dense material -- strong and stiff. In addition it has some us water repellent on the surface. So that it's protected from the elements during the open times that -- so exposed to the weather. Yeah they treat you with a wax like finish so that you can have it up to like a month study exposed to weather you don't have to worry about getting damp or do you laminated. And the stability of this kind of lumber also makes it possible -- use it as a single layer of underlayment that you can put your finish flooring -- That's correct there's no unsupported edges with a tongue and groove plywood and so that. Worthy ends -- it hits on top of joist and then the edges the tongue and grooves meet together are supporting it -- market again. Now your son Richard isn't working you're all on how you like working with a -- plus. It's great stuff very -- very sturdy it's got some great characteristics that by the guys you're here to help this stuff weighs about 75 pound the sheet yes. Yeah it is heady stuff do you guys have to bring it all up here on your own right. This over thirty sheets for the hope that we can skip the camera that gave betacast yeah. All right so now we're using the same kind of adhesive materials that we've used done on the exterior for a furring strips right."

" It's the same adhesive actually it's. We're using on all of our structural applications where we've put plywood destruction. Were actually using this adhesive to increase the strength and stiffness of the structure."

" What kind of foam is it. But this is polyurethane foam really thickens up call purse stick its gun dispensed so I can control the -- better mousetrap that I can open up the set screw. Lay down any sized bead that Howard needs so we'll attach it will go and -- pattern and I'll get started doing that. So I just open up the set screw and pull the trigger speculate on any sized bead I want knuckles like deaths. This is a construction adhesive no solvents so it's not going to do any damage whatsoever. Today's GPS war when you -- solvents community petroleum based solvents that would dissolve your C -- construction adhesive that have to be glad would actually start -- through the EP yes you know rule warning warrant -- creating a water channel warning the the polyurethane rest of the key thing though your blog that we have to do that's different than the standard construction adhesive is. It comes up like this shaving cream it now chemically grabs the moisture throughout the air. From the this paucity of this resin will thicken up. So it needs an open time of about three minutes and they'll go I'll just touch and go from the shaving cream into word cheese -- or more of a standard construction adhesive to increase the -- quality of the product it's very space --"

" And how long does the phone have to set before you can put the plywood sheets down on it under normal relative humidity conditions. We would have collapsed it fell five to seven minutes that we're going to accelerate a little bit. We've got a -- spray water bottle over that role -- there are nights of moisture cure urethane death. So if we get a little bit extra moisture on the on immaterial little accelerate the."

" All right. So."

" Let's put the to a dozen this Richard you can handle that -- certified hanta. OK so it's just sit up on. The ends of that is the groove side. And we're gonna that it right in. --"

" Very nice. And so it's engineered does I was a little bit of a gap here for expansion and contraction fact if you look at the back of the sheet Barrett says rebate in space between Boston's Eric yeah we're kind of nails are using -- isn't that the galvanized. -- the beauty of the hot dipped is that you've always got that roughness that comes from. The galvanizing process and that I was helps with the -- it increases go -- friction with the nail so there are they withdraw lot harder so they hold. Yes exactly. All right so just go ahead and tack it in place but. But the overall nailing pattern supposed to be what six inches on the edges of the -- is on the edge of an eight inches in the and it means. Great all right we'll let me ask you one last question about. The roof system that we were talking about a minute focus on the back side it's all going to be one continuing line. And if you look at our gable end wall here it's kind of an unusual looking gable end right. It's it's a clear story construction with -- really to shed roof is coming together exactly and so that vertical line there. Actually will be a vertical wall of glass all the way across the top it'll have five windows and it. And they'll they'll be wind up with the windows in the in the lower part of OK -- can't wait to see the roof come together -- me to I sat Richard."

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