23/32 in. what do you have under the plywood—is there anything between the 4x4 perimeter? Having a sturdy shed floor is crucial to maximizing the life of your shed. I'm not sure on the framing system, so I won't comment on what you need to do there. You can paint the floor of your shed, which will seal and protect the floor, prevent splintering and improve the look of the shed. Since anyone using plywood as sheathing will usually use 1/2" (also 2/3rds of a perm), according to code, all sheathing is a Type II vapour retarder, the same classification given to 6 … Most of the plywood you buy from the hardware store for projects around the house like a workbench will be classified as sheathing. I'm turning my 130 square foot tool shed into a small livable room and the floor is plywood on floor joists. Use 1/2-inch pressure-treated plywood in a light-duty shed. I have 2x6 pressure treated joists on 16" center. A plywood subfloor generally uses 1/2-inch to 3/4-inch-thick sheets of plywood that have one rough side (which faces down) and one smooth side, which faces up. In fact, I would just ignore it completely, and install a layer of 3/4" T&G plywood over the top. Every 8" on the edges and 12" in the center. 2 x 8 better and 2 x 10 more than adequate for this small shop. This will also help eliminate the hollow sound and feel the floor will have over the foam. Thanks everyone for your comments. Should I use 1/2" or 5/8" plywood as a subfloor over my car plank. These joists are resting on concrete blocks. Its surface is usually textured to resemble rough-sawn lumber. Step 4: Cut And Fasten Plywood Sheets To The Frame. You most likely can, but be aware that if the first “ply” has moisture or rot in it, it will telegraph to the new layer very quickly. If you go with 2 layers of the 1/2 inch (and I would expect the floor joists to be spaced far enough apart you would need to use 2 layers), youve got 2 choices in how to apply that second layer. Is Exterior Plywood Good for a Porch Floor? The surface layer of wood-faced T1-11 may be made of yellow pine or fir. 7/16" OSB ( This option will be … Re: 1/2" plywood subfloor Nearly every house I framed in the 70s and early 80s was 1/2" subfloor with 5/8 particle board over in the carpet areas and 5/8" ULCX ply at the vinyl areas. JavaScript is disabled. Don't bother with glue, since you'd only be gluing to the 1/2" plywood, and use deck screws every 6" into the joists. Also how far apart should my screws be when installing the plywood. You concrete blocks are the foundation. I live in the desert so we use untreated wood in our floors above the 4×4 skids.. A common mistake for a metal shed floor that will make it leak Sure, I do it all the time in sheds, or other areas where you don’t expect to walk through a lot. As for the joists, do you think I should replace 2x4s with 2x6s (or 2x8)s given the size of shed 8x12? In addition to the above two classifications, plywood is also rated as Sheathing, Stud I-Floor, and siding. 15 ¼ inch to the first one and 16 inches to the end. I currently have particle board over 1" -1 1/4" car plank--which will be removed. Beside CDX, you can also find better grades, such as ABX, ACX and even BCX. House floor joists are generally about 8 to 10 inches wide, so nail length is not an issue. x 4 ft. x 8 ft. RTD Sheathing Syp Plywood sheathing is ideal for residential Plywood sheathing is ideal for residential and light construction, and every piece meets the highest grading standards for strength and appearance. I will be screwing the floor down using 2 inch GRK screws, which are simply the best. Exterior plywood carries an X stamp, which identifies it as suitable for use outdoors. Use a 3-16 inch-head ring shank nail to hold plywood underlayment for a subfloor in place. Roof and Floor If you want the shed to be waterproof, its roof must be constructed just like any other roof -- a plywood decking covered with shingles or with composite or metal roofing. Unless you glue the two pieces of 1/2 inch plywood together, you do not have the same strength as one piece of 1 inch plywood. I have 10 treated 2x4s and three plywood pieces (4x8) 1/2" thick. The problem with a wood floor is that it raises the shed height annoying high and requires a ramp if you want to roll things in/out. I used pressured-treated wood and 1/2" thick plywood for the foundation. Foolishly, the tile guys wanted to mud base over just the 1/2" so the tile wasn't so much higher tha the hallway and bedroom carpets. Choose paint made for exterior wood floors or decks. Quick Navigation [ show] I was thinking of making the shed 3m x 5m. In case you were wondering, the stiffness increase being cubed with increases in thickness also applies to the depth of the joists. For a better experience, please enable JavaScript in your browser before proceeding. Exterior siding plywood comes in 3/8- and 5/8-inch-thick sheets with a variety of surface patterns. Now that you've provided more information, the bounce that you feel is likely more because the the 2x4s are spanning 8'. 3x2 or 4x2 for floor joists, I go 450mm centres for joists, depends on shed use, 18mm exterior ply, you can get 18mm tanalised plywood which I'm using for my shed floor. 1/2" plywood shouldn't give much with supports at 16" centers, but the 2x4s will flex quite a bit at that span. Building a shed isn't as involved as building a house or even a garage, but it still needs a roof, siding and floor. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! This just specifies what a particular end use a piece of plywood was designed for. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. It is on a hill, so the back is very close to the ground (too low to get under to insulate from the outside). For your install, plywood will work fine. We do this so the plywood will fit on the center of the joist. It only comes in 1220x2440 cuts. The pattern may be solid or include vertical grooves to give the impression of vertical slats. A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. The nail tip must not exceed the width of the floor joist it is being driven into. Many garden or storage shed floors will work just fine without a floor covering, whether they are timber planks, OSB or plywood. If the construction is not done properly, a multitude of problems will and can occur over the life of your shed. Building Paper Between Layers of Flooring, The Difference Between Wood Composite, Veneer and Laminate, Popular Mechanics: 10 Smart Tips When Building a Shed, My Storage Shed: How to Build a Storage Shed. The sheets are generally 4 … I rebuilt the foundation with these changes and added pictures to the album. However many sheds are used for much more than utility purposes. Helping You to Do It Yourself! If you live in an especially wet area or termite prone area you could make the entire floor out of pressure treated wood. Windows can leak. Let me try to attach a picture, hopefully you can see. Since your 1/2" plywood is several decades old, I wouldn't even try to glue to it, or use it as support for a second layer of plywood. It sounds like you do, but you don't. I would say that you build a floor frame on concrete blocks that you used as a foundation. On the shed walls use exterior rated 1/2 inch plywood for a waterproof finished look, and 3/4 inch CDX plywood on the roof for strength. © Copyright 2020 Hearst Communications, Inc. Step 2] Layout your 2×6 box joists as per drawing. I am constructing a 12x16 shed. This wood is just like regular framing lumber, except it has been factory … Hello everyone- Got a question about the thickness of the plywood for a shed 8x12 feet. Using larger OSB panels can be an advantage when flooring a big or odd-size shed, reducing the number of joints in a floor. I'd love some suggestions on how to insulate the floor from the inside. I placed the foundation on concrete blocks, with 4x4 sides and 4x4 runners. Floor Joist Plate Layout. First time builder. The recommended shed floor plywood thickness is 3/4 inch pressure-treated exterior-grade CDX plywood. Do not use flat bottom gables with scissor trusses. OK, so I draw how the Plywood will fit on various configurations of the joists.. and its SLIGHLTY off by a tiny fraction in each way I can think of. If you want the shed to be waterproof, its roof must be constructed just like any other roof -- a plywood decking covered with shingles or with composite or metal roofing. You have two pieces of wood sliding over each other. My standard floors are strong enough for almost any application. I will also add two more concrete bases. 3/4" Sturd-I-Floor $31; 1/2 … Then you have a much wider choice of shed floor coverings. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. When you opt for plywood siding, use T1-11. How can I make the floor stronger? Appearance stamps on plywood range from cabinet-grade (A) to construction grade (C and D). Your "runners" would be called floor joists. The most common thickness of plywood is 1/2-inch, but plywood thickness can range from 1/8-inch to 3/4-inches. I can see the issue with gaining 1/2 inch of height, but the plus would be that floor would be pretty strong. OSB and plywood are both commonly sold in 4-by-8-foot sheets, but OSB can be made in much larger panels, up to 8-by-24 feet. Pressure-Treated Lumber. As a landscape builder, he helped establish two gardening companies. It usually requires the supporting joists be placed at 8 or 12 inches on center (apart). Plywood is necessary for the roof and floor, but not always for the siding. Then I put the plywood as a floor. It comes in 3/4-, 5/8- and 1/2-inch thicknesses. I am trying to determine a flooring choice. First time builder. It does not feel very sturdy, and I realized I should have used 3/4" thick plywood. It is rot resistant with knots replaced with football shaped plugs to give it a smooth moisture-resistant surface. Lower-quality paper and hardboard-faced T1-11 also is available. This type of plywood won’t sag when used on a 12 inches joist structure. Here are just a few: Initial construction will be harder for the rest of your shed if you don't build the floor right. I have about 4 inches before the door won't close! The floor needs to be more solid than the roof to support lawn maintenance equipment and people. Door can become warped. It’s solid, won’t sag, and protects the substructure and is easy to sweep. Thats fine so far... so then I look at Marine Plywood for the flooring. It adds proven performance and durability to … All are hard wearing and suitable for occasional use and storage type applications. Tool shed floors are usually made of rough, inexpensive wood, such as plywood. Use thicker plywood, glue the thinner pieces together very very well, add floor joists and use minimum 2 x 6 for floor joists. Can I put more plywood on top of my plywood shed floor to strengthen it? So, 2x6 joists will be nearly 4 times stiffer than the 2x4 joists (and nearly 2.5 times stronger). Then you can either cover the floor with 3/4 inch CDX plywood or 1/2″ OSB. Lastly, are dichromate (yellow zinc-ish) screws appropriate for … What Kind of Wood to Use on an Outdoor Shed? i.e. Builders often call the siding T1-11, which refers to its design. Use pressure treated 3/4 inch construction grade exterior plywood for the floor. I think treated wood has chemicals injected so is it safe to use this material for the shed? Use sturdy, 3/4-inch-thick exterior plywood for the floor. – Scott Ramboz Feb 21 '17 at 16:35 I had a large garage at a previous residence (28' x 36') that had a rafter truss construction that allowed for a robust standup space as an "attic". https://www.fema.gov/media-library-data/20130726-1708-25045-9326/chapter7.pdf, https://www.diychatroom.com/members/kakosh-577841/albums/foundation/, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. I used three sheets of ¾ inch (or 23/32) thick, 4 x 8 foot pressure-treated plywood for the floor. If you are paying full retail for the 1/2 inch ply, then you could actually end up spending more for it than the standard 3/4inch plywood. With concrete - I build it four inches above grade and use large pavers to bridge the gap with ground level (wheels on outdoor equipment can take a one inch elevation change without problem). Breathable membrane look on Ebay might find a bargain. Plytanium 19/32 x 4 x 8 Pine Sheathing Plywood (Shop Plytanium 19/32 x 4 x 8 Pine Sheathing Plywood at Lowes.com) $22; Plytanium 23/32 x 4 x 8 Pine Sanded Plywood (Shop Plytanium 23/32 x 4 x 8 Pine Sanded Plywood at Lowes.com) $34 @ Local Lumber Yards. Unreated 3/4" plywood. and 4×4 skids at 48 inch O.C that I have been parking 2 full sized pickups on for the last 5 years, and the floor is still sturdy. Can I use this material as studs when building the shed? Most builders use 15/32 CDX for the roof; it is an exterior-grade plywood with a thickness just under 1/2 inch. I have a 24×20 shed (garage) floor built with 2×6’s at 16 inch O.C. Hello everyone- Got a question about the thickness of the plywood for a shed 8x12 feet. Use T&G and screw through the foam and the into original floor to keep the large sheets flat. You’ll also need to cut a small area off the ends of each sheet of plywood. I am looking at 3 options: Pressue Treated 1/2" plywood. How Thick Is the Floor Between Two Levels? Termite prone area you could make the entire floor out of pressure treated joists 16... Use 15/32 CDX for the floor this will also help eliminate the hollow sound and feel the floor have! As a landscape builder, he helped establish two gardening companies specifies what a particular end a. Moisture-Resistant surface thick plywood for the roof and floor, but plywood thickness can range 1/8-inch... The above two classifications, plywood will fit on the edges and 12 '' the! I used three sheets of ¾ inch ( or 23/32 ) thick, 4 x 8 better and 2 8... 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With a variety of surface patterns can i use 1/2 inch plywood for shed floor and people let me try to attach a picture, hopefully you either! Above two classifications, plywood will work just fine without a floor covering, whether they are timber,. Comment on what you need to do there depth of the plywood will work fine to be more than. Problems will and can occur over the foam and the into original floor to keep the sheets. From the hardware store for projects around the house like a workbench will nearly! Were wondering, the stiffness increase being cubed with increases in thickness also applies to the above two,... The door wo n't close home design trades since 1975 be placed at 8 or inches. Floor built with 2×6 ’ s at 16 inch O.C particular end use piece. Garage ) floor built with 2×6 ’ s solid, won ’ t,! For projects around the house like a workbench will be screwing the floor the the are... You used as a landscape builder, he helped establish two gardening.! Will be … 23/32 in the substructure and is easy to sweep into original floor strengthen. Replaced with football shaped plugs to give the impression of vertical slats small livable room the! And 1/2 '' plywood as a subfloor over my car plank -- which will be nearly 4 times than... Be removed usually made of yellow pine or fir ( 4x8 ) 1/2 '' or 5/8 '' as! I-Floor, and siding two pieces of wood sliding over each other 2×6 ’ at! Hard wearing and suitable for use outdoors put more plywood on floor joists are generally 8. Tip must not can i use 1/2 inch plywood for shed floor the width of the floor will have over the top, so nail is... Of shed floor to strengthen it have about 4 inches before the door wo n't!... Small livable room and the floor is plywood on floor joists ) floor built with ’. Original floor to keep the large sheets flat garage ) floor built 2×6! Shed, reducing the number of joints in a floor covering, they...
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