Lay the Deck Ep.44

welcome back for this house for the time being were done with the utility work in the crawl space we've done the sewer water and HVAC ducting later we will need to put in a small amount of natural gas the big thing that will be done in our crawl space is the insulation it'll be placed and pushed and secured into the cells between the hoist but that needs to wait until a house has walls in a row we don't want to risk that insulation being soaked with rainwater and it's just absolutely certain that there will be one or two times when there will be rain you know that's gonna be coming along before the roofs on this place so we leave the insulation out until pretty much the end of the process putting the decking on a subfloor system like this is a lot like putting concrete on compacted fill your concrete is never going to be any better than the compacted fill and the deck is never going to be any flatter or quieter than the preparation you put into the framework in this case these engineered wood and i-beam Boise Cascade I juiced if they're not flat if they're not held up properly if they're not fastened you know your deck is gonna have problems so we've paid close attention I think we've got all the bugs worked out one of the things about these top flange hangers I mean they go on easy and they're kind of intuitive and they work great except it's been a few days since I put this mud sill on the top of this foundation and if it's been sunny and so the moisture has been pulled out of this pressure-treated board and the outside edge is bolted down tight but the inside of this all the way around has curled up a little bit it's curled because it's shrinking on this side up towards the Sun besides that being pulled down hard on the outside tends to lift the inside so the inside of this board is just a little higher I don't I don't really want to overreact to that because when I put the weight of the house on there you know when there's when there's two or three or four hundred thousand pounds of structures sitting down here this boards gonna press down flat but I am putting an eighth of an inch shim on here to sort of compensate for the distance of the top flange and the framing fastener nails I mean they're up a little proud puts a joist up a little proud so we're up just a little bit right here I think that's gonna get the bottom plate of this wall sitting nice and flat putting a steady down load on the ends of these joists so they don't squeak in the hangers and hopefully will not make a nice flat place to start the bottom plate coming up on these walls [Music] [Applause] [Music] this is the 3/4 inch OSB tongue-and-groove decking that we're going to use I like it the sheets are light enough that you can move around but they are perfectly flat and they're gonna lay nicely on these joists there's some controversy about OSB versus plywood and we'll go into depth on that here in a few minutes but right now what we are going to do is snap a line four feet from the edge of the building that's because we're going to rip the tongue side of this sheet off and then we will be laying the tongue side of the future' sheets into the groove side of the sheets that are in place that's important you don't want to be trying to push your sheet on to the existing sheets from the tongue side because you'll break the tongue off then you'll have a problem it's a good idea you've got to snap a line to start this I mean it's really important that this be straight and to end and it's really important that your first course be nice and straight otherwise you know any deviation from straight that you have in your first course is going to grow across the floor and by the time you get you know five or six courses over you're gonna have big nasty butt joints that are just no good and it's a problem and it slows you up now your butt joints don't have to be tight in fact the manufacturer specifies and requires that the butt joints are not tight they like to have a little space you know as much as an eighth of an inch that bugs me I hate to leave an eighth of an inch gap so I you know I bring them up to where they're maybe about as open as maybe the thickness of a nickel that's an old carpenters measurement that used to apply to hanging doors but just leave a little space at the butt joints and don't work yourself to death driving the tongue-and-groove seam tight you need to leave a little room for these things to grow and shrink as it rains or as humidity goes up and down which by the way is one of the real strong suits of OSB if it gets wet it's going to puff up the edges will fuzz up and raise up and swell a little bit but when it gets dry it'll go right back down unlike a plywood where an even a good grade of tongue-and-groove subfloor can if it stays wet enough long enough delaminate and then you got those top laminate making these bubbles it just really can't be fixed out in the middle of your floors so this is not enough OSB to deck both the ground floor in the second floor I'll probably have to get a little more heck maybe a lot more I don't even know how many sheets are here but I just want to go on record as saying I love OSB on a sub floor and I love it on a roof it's a good material and it's for my money and for my perspective you just can't do any better as with almost every other process in carpentry the first course the first wall the first rafter whatever it is it the first one is the one that goes slowly because you're putting together your system that is doubly true on this because the starter course on the edge of this house has about I don't know maybe a dozen maybe a dozen and a half penetrations that have to be located pretty closely if you're gonna get this sheet to drop in so I've got to get the holes marked I've got to get them drilled I've got to check the fit I've got to get some glue under there and then drop it back in place and make sure it comes very close to this 4-foot half-inch line that we snapped out in the middle on these joists [Music] [Applause] [Music] [Music] we will you brother [Music] one of the big attractions the selling points of it of a wooden I Joy's floor system is that they're flat because all the members are the same width and you can mess that up in a moment if you leave a big chip of wood or a pebble or something gets stuck in the glue and you just go ahead and drop a sheet on there you're gonna have a lump you're gonna have a high spot in your floor that essentially will never go away and will possibly cause a squeak so be sure to have some sort of a brush or at least pay attention and you know get anything that you see that's out there that's in the wrong spot brushed off before you drop that sheet on so this glue is actually way more important to this floor system than one might expect if you've ever tried to tear off 3/4 inch OSB or plywood from wooden I just you know years after it's been set up in a remodel or something you will have learned that that glue if it's well applied makes the plywood the sheet good and the joist one piece that the wood itself will fail and will pull off at the bottom of the sheet and off of the top of the joist before the glue will separate sometimes it essentially welds the sheeting to the joists that is really way more important than simply whether or not you have a squeak on your floor although those go away with a well glued job also the glue fills any it fills any incidental voids and welds the decking to the joists so that there's no way no reason no possibility of any movement between the diaphragm and the joists which is after all what causes a squeak [Music] if this staple gun looks like a nail gun you can relax because it's not I'm not driving any nails through this three quarter-inch tongue-and-groove decking into these i-beams because a nail introduces the possibility of a squeak that's straight cylindrical shaft on that nail gives a chance if the glue doesn't bind real well for a little vertical movement and a slipping squeaking action around the shaft of the nail so this staple gun is putting in staples medium crown staples inch and 3/4 leg because in my opinion a staple is not going to provide the same opportunity for a squeak as a nail and I have to have something to hold these sheets in place while Lenny or Daniel come behind and put the screws in so you can't wait around to get the screws in once your sheets laying there on the glue because you want the screws to clamp to squeeze that sheet down against that joist and squeeze that glue down just as tight as you possibly can it's like the ultimate clamping system right to screw these things down 12 inches on Center in the field 6 inches on Center on the edges I mean now that's a clamp and the screw is as I mentioned a number 10 because it has to have enough heft that it will be providing sheer strength you put about I don't know we're probably gonna put 120 I don't know maybe actually probably gonna put 75 pounds of screws out here in this deck that's a lot of sheer strength and so it makes this floor really strong which makes this foundation really strong so the backfill the foundation is not retaining anything because of the screws and the diaphragm of the floor so the screws are important there are torques drive because I love torques drive we're gonna put this whole deck in and probably only strip two screws which is way better in my opinion than you would get with any other screw head configuration the two and a half inch screw length is long enough to get full penetration through the three quarter inch decking and full penetration through the top flange of the wooden i-beam the screw will be entirely in case there'll be just a little bit sticking out the bottom for the insulation man to rake his knuckles open on in the crawl space but aside from that the screw is working perfectly it's important that you have a little bit of shoulder on this screw that's smooth no threads so that when you have the threads engaged in the flange the shoulder is slipping in the piece and will pull the piece down rather than tending to create a space between the threads that are in the flange and the threads that are in the screw so look it over you'll have something in your neighborhood these are suitable for used on in the exterior on a deck on composite decking material that's what was available here and so we were in a hurry and we bought it they don't have to be because you don't mind a little staining in your subfloor but heck if you can get them and if the price is the same why not right because your subfloor I can guarantee you at least around here is gonna get wet a few times before the roof is finally on [Music] [Music] [Music] [Music] so having said all that about nails and all of that being true there are plenty of floors that have been nailed down with ring shank nails and they're better I mean they are made to mimic the effect of a screw where there are ridges to keep it from you know moving but I'll tell you this if you are doing a job and you absolutely do not want to call back because of a squeak in your floor you got to you have no choice screw it down this OSB does not have a top and a bottom structurally but it has a top and a bottom cosmetically and that is because on one side there are lines that are painted on to the onto this material so that you can see when you're nailing off the joist where the center of your joists are and the lines accommodate both 16 inch and 24 inch layout on your joist or your roof sheeting that's handy and the lines are straight enough that you can cut according to them as long as you keep an eye on it and realize you may have to go back and clean it up just a little bit when the next sheet butts into it these lines for fastening are huge time savers because otherwise you're making marks and trying to find the joist and you're missing and have to take your fastener out or you're snapping across the sheet time after time after time while the glue is getting dry so I recommend that when you're putting when you pick up decking to put on your joists you look for some and ask the lumberyard it's just going to have the centers the lines the nailing lines already in place it's time saver [Music] even though the joists and the decking is working at your ankles I mean rolling the joists you're down low and you're on the you're on the foundation and decking you know you're working at your feet then you're walking on it it's still framing it's all framing it's wood and it's sawdust and it's nails and it's screws and I've got to say I love it it feels good to be back at that and be up out of the ground so thank you for discovering and watching our house building series I hope you're enjoying it as always thank you for watching essential craftsman and keep up the good work [Music]

Channel: Essential Craftsman

Views: 329,395

Rating: 4.9553671 out of 5

Keywords: decking, subfloor, deck, shims, OSB, tongue and groove, plywood, tape measure, floor joists, glue, screws, floor squeeks, I beams, foundation, torx, framing

Id: yTlfgafMC9Y

Length: 19min 51sec (1191 seconds)

Published: Thu Oct 10 2019