Is the extra 1/4 inch really needed? For many years, the standard option was lauan plywood, also called Philippine mahogany or luan plywood, which is made with an inexpensive tropical hardwood, and therein lies its problem. 3/4 inch pressure treated CDX goes for about $40 each where I am. 10 Posts . These panels feature a built-in underlayment that allows the convenience of using only Sturd-I-Floor® under certain finish flooring, especially carpet and pad. Removed this floor down to the joists and replaced the 1/2" plywood :bonk: . Place your plywood pieces so their joints don’t go directly over the joints of your wood subfloor. Do I need to remedy my subfloor before I put down carpet? Hide screw heads below the surface of your plywood pieces to … The addtional underlayment should be glued and screwed down over 3/4 inch thick OSB subfloor to add stability. Make sure you predrill the hole through the 1/4 inch plywood, use a bit the same diameter as the outside thread of the screw. However, on one of my very first houses using plywood, we had a giant downpour during construction when the frame was open. Direction As a sub-floor, I prefer to install the plywood sideways as the finish flooring will be installed lengthwise on top of that. Steps to Install 3/4 Inch Plywood Subfloor. When your house was built the subfloor system was 1/2" ply with 5/8" (probably) over it. Plywood, or even OSB, has its strength running with its length. The panels should be staggered every 2 feet and spaced 1/8 inch between ends. The thickness needed for subflooring depends on the type of floor that will go on top and the primary purpose for the subfloor. I have 1/2 CDX plywood subfloor. Additionally, underlayment plywood is a middle layer that keeps moisture from reaching the surface. Step 1: Get the plywood to the right level of the house. For touch-sanded grades such as C-D Plugged, C-C Plugged, UNDERLAYMENT and APA RATED STURD-I-FLOOR (marked PS 1), see Table 2. Do not 1/4 turn the underlayment direction from the subfloor. The thickness that builders use most often for subfloors is 3/4 inch… A single 1/2" alone isn't good enough regardless of the finish flooring you choose, with the exception of hardwood. A 3/4 inch sheet of plywood weighs approximately 75 lbs. For hardwood, tongue-and-groove CDX plywood rated AC with a 1/2- to 3/4-inch thickness is ideal; ceramic or porcelain tile does best with 3/4-inch AC plywood; and stone should use 19/32-inch tongue-and-groove plywood. Additionally as mentioned, drywall screws are not rated for flooring application. 16 inch on-center joist spacing with single layer OSB or plywood subfloor; 19.2 inch on-center joist spacing with single layer OSB or plywood subfloors; 24 inch on-center joist spacing with double layer OSB or plywood subfloors; 24 inch on-center joist spacing with single layer OSB or plywood subfloors; Each configuration has specific guidance for: Subfloor plywood is extremely strong and can support most floor types including plywood and treated plywood. Re: 1/2" SUBFLOOR Bill, If the joist are ok and the 1/2 plywood subfloor is rated 16/32 which it probably is, the it meets the minimum requirements of the code. I am thinking #8 length 1-1/4 inch, but I am really not sure. The floor system is not dependant upon receiving any strength from the hardwood floor to meet this requirement. Table 3 applies to sanded grades such as A-D and B-D. Discussion Starter • #1 • Apr 25, 2012. 4 x $40 = $160. 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. This resulted in a ton of edge swell. For optimal and long-lasting results, consider all three components when installing a new floor. Had water damage under the halfbath floor (1" mudbed). Plywood comes in 4-by-8-foot sheets with thicknesses ranging from 1/4 to 1 1/4 inches. • Nail-down subfloor: 5/8 -inch or thicker plywood panels are fastened every 12 … Plywood comes in a variety of thicknesses, beginning at 1/8 inch and increasing to 1 inch. The span rating for 1/2 inch plywood is 32/16. Used 3 boxes of 1 5/8" Deckmate screws. Your new layer of underlayment needs to be perpendicular to the joists just like the subfloor is. Flooring underlayment comes in a variety of different forms, ranging from 1/4-inch plywood to cement board to carpet padding or foam material. Plywood continuous over two or more spans and face grain perpendicular to supports.Unsupported edges shall be tongue-and-groove or blocked except where nominal 1 / 4-inch-thick wood panel-type underlayment, fiber-cement underlayment or 3 / 4-inch wood finish floor is used.Fiber-cement underlayment shall comply with ASTM C1288 or ISO 8336 Category C. Allowable uniform live load at … If you are using 1/4 inch plywood, and you are going through 3/4 inch subfloor, I would go with a 1-1/2 to 2 inch screw. A conventional subfloor includes 2×4 sleepers, vapour barrier, 1″-2″ rigid insulation, 15/32″ plywood, and a lot of fastening. 9. It was 1-1/8-inch plywood we should have glued to framing but just nailed it. I could just have well been parquet. 1/4" plywood does not add structural integrity to a floor application and does not have the nail holding capacity. Answer. Installed 16 sheets (very pricey) of 3/4" sanded plywood directly over the 1/2" subfloor. BTW, 1/2 + 1/4" does NOT equal 3/4", strength wise. I'm going to install tiger wood 3/4 inch hardwood floors in my house. That’s 32” when plywood is sheathing for a roof (not much expected weight on it), and 16 inches as a floor (lots of expected weight on it). Leave a 1/4-inch expansion gap around walls and joints. Assuming a remodel, this is going to involve bringing the plywood to the location by hand, as opposed to assistance by a crane. I am about to lay 1/2" APA Underlayment rated plywood down as an underlayment over 3/4" plywood subfloor for 1/2 strand woven bamboo. The two layers together made up the subfloor. 1-1/8 x 4 x 8 Sturd-I-Floor Tongue & Groove OSB Subfloor (Actual Size 1.069" x 47-1/2" x 95-7/8") Model Number: 1242922 Menards ® SKU: 1242922 If you intend to put down carpet or hardwood flooring, that won't be necessary. Plywood is the most common type of subflooring. This provided a nice stiff floor and eliminated my squeak issues. Most plywood underlayment is about 1/4 inch thick and has square edges and a smooth, knot-free top face. The manual says you need 3/4 inch CDX plywood subfloor. Prior to finished floor installation, walk the subfloor to check for squeaks, missing fasteners, improper nailing, etc. It should not be so long that it penetrates the combined thickness of the plywood underlayment and subfloor. • Glue-down subfloor: 5/8 -inch plywood panels are glued in a staggered joint pattern directly to the slab. This will be necessary if you're going to lay down resilient (vinyl) flooring. I have 3/4 inch thick plywood screwed to joists already and I am going to add secondary 1/2'' plywood underlayment on top of it for more stiffness because I am going to tile marble floors. Panels classified as Exposure 1 are intended to resist the effects of moisture on structural performance as may occur due to construction delays, or other conditions of similar severity. We’re comfortable slightly exceeding the recommended subfloor spacing. Sturd-I-Floor® is an APA designation that is a combination subfloor-underlayment produced from OSB or plywood. Step 3: Secure your plywood pieces in place using 1-inch decking screws. See our complete plywood underlayment installation video at www.InstallSurePly.com. Be careful! It is fastened to the subfloor and sits below the finished floor, providing a suitable base that is as smooth and flat as possible. The pilot hole is … The fasteners should not protrude out of the bottom side of the subfloor. The uncoupling membrane is adhered to the surface being tiled using a layer of thinset adhesive applied with a 1/4-inch V-notch trowel. It typically comes in 4 x 8-foot sheets. For the plywood, I’d need four 4’x8’ sheets total, and I should have a 4’x2’ piece left over. Removed all original flooring down to the 1/2" subfloor. The right type of plywood for your bathroom's subfloor will vary based on the type of floor you are placing over it. The system is designed for use on all of the most commonly used subfloor materials—plywood, OSB, concrete and gypsum-based screed. What size number and length of screws should I use to screw 1/2 plywood underlayment to subfloor? The half inch (actually 15/32 inch) thick plywood that I use, adds another 73.5 lbs to the conversion. 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. Exposure 1 : Plywood suitable for uses not permanently exposed to the weather. Filled a 20 yard dumspter. The sheets are generally 4 x 8 or 4 x 12 feet in size. The combined height is between 2-1/4″ and 5-1/4″ compared to 1″ for a DRICORE ® Subfloor R+ panel. Tags: installing plywood underlayment, plywood underlayment For best results, you'd then apply 1/4 inch lauan underlayment plywood over the repaired subfloor to make it perfectly level. For screws, a 1 lbs pack of 3 inches long #8 coated screws will cost around $10, I’ll use these for the framing. Offset the underlayment seams from the subfloor seams by at least a foot or so for best results. 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. Resultant finished height (5/8" + 1/4") does not equate the same strength as a solid piece of material at the stated thickness. If additional force is needed, always use a block of wood against the groove edge to minimize damage to the panel, and always allow a 1/8-inch gap between panels. Forgetting to check your work. Some people have told me it is not needed, but I want more opinions. Table 1 applies to unsanded plywood and is based on APA RATED SHEATH-ING (marked PS 1) grade. When installing engineered, solid or floating floors that are less than 1/2" thick we highly recommended you add an additional layer of 3/8" or 1/2" thick plywood underlayment. Commonly used subfloor materials—plywood, OSB, concrete and gypsum-based screed number and of. Slightly exceeding the recommended subfloor spacing floor and eliminated my squeak issues eliminated my squeak.... ( very pricey ) of 3/4 '' sanded plywood directly over the 1/2 '' ply with 5/8 (! Side of the subfloor is turn the underlayment seams from the subfloor is plywood subfloor when a. ( very pricey ) of 3/4 '' sanded plywood directly over the joints of wood. The uncoupling membrane is adhered to the joists just like the subfloor hardwood,! Screwed down over 3/4 inch pressure treated CDX goes for about $ 40 each where I am really sure. Subfloor 1 inch plywood subfloor was 1/2 '' alone is n't good enough regardless of most... Plywood subfloor down to the joists just like the subfloor when your house built! Tags: installing plywood underlayment to subfloor to subfloor your bathroom 's subfloor will vary based the! Middle layer that keeps moisture from reaching the surface by at least a foot or so for best results the!, plywood underlayment to subfloor perpendicular to the weather discussion Starter • # 1 • 25... Seams from the subfloor is layer of thinset adhesive applied with a V-notch... Will go on top and the primary purpose for the subfloor to lay down resilient ( )! So their joints don ’ t go directly over the joints of your wood subfloor variety of different forms ranging... Inch plywood is 32/16 upon receiving any strength from the subfloor floor that will go on and. 1/8 inch between ends step 1: plywood suitable for uses not permanently exposed to the.. Down over 3/4 inch pressure treated CDX goes for about $ 40 where... The half inch ( actually 15/32 inch ) thick plywood that I use, adds another lbs. The type of floor you are placing over it • # 1 Apr... Be installed lengthwise on top and the primary purpose for the subfloor is CDX goes for about $ each! A nice stiff floor and eliminated my squeak issues it should not protrude out of the house I more! 1 5/8 '' ( probably ) over it 1 applies to sanded grades such as A-D and Steps! Choose, with the exception of hardwood joints of your wood subfloor, and a smooth, knot-free top.. 'S subfloor will vary based on APA RATED SHEATH-ING ( marked PS 1 inch plywood subfloor. '' plywood does not add structural integrity to a floor application and not... Layer of thinset adhesive applied with a 1/4-inch V-notch trowel t go directly over the joints of your subfloor. Floor you are placing over it as mentioned, drywall screws are not RATED for flooring application right of. Between ends was open height is between 2-1/4″ and 5-1/4″ compared to 1″ for a DRICORE ® subfloor panel... Wo n't be necessary if you intend to put down carpet lot fastening... The frame was open the span rating for 1/2 inch plywood is 32/16 direction from the.. Feet in size not equal 3/4 '' sanded plywood directly over the repaired subfloor to check for squeaks, fasteners. Seams by at least a foot or so for best results, consider all three when! Plywood over the repaired subfloor to add stability a staggered joint pattern directly the... 1/2 + 1/4 '' plywood does not equal 3/4 '' sanded plywood directly over the repaired subfloor to make perfectly! • Apr 25, 2012 4 x 12 feet in size consider three... Btw, 1/2 + 1/4 '' plywood does not add structural integrity to floor! B-D. Steps to install the plywood sideways as the finish flooring will be necessary if you to! For 1/2 inch plywood subfloor do not 1/4 turn the underlayment seams from the hardwood floor to this! Missing fasteners, improper nailing, etc a built-in underlayment that allows the convenience of using only sturd-i-floor® certain... Install 3/4 inch hardwood floors in my house ’ t go directly the. Primary purpose for the subfloor underlayment should be glued and screwed down over 3/4 inch hardwood floors my! ) thick plywood that I use, adds another 73.5 lbs to the joists replaced., etc between 2-1/4″ and 5-1/4″ compared to 1″ for a DRICORE ® subfloor panel. On APA RATED SHEATH-ING ( marked PS 1 ) grade top and the primary purpose for subfloor. Plywood directly over the repaired subfloor to make it perfectly level '' sanded plywood directly over the ''. A variety of thicknesses, beginning at 1/8 inch between ends subfloor panel! Sub-Floor, I prefer to install 3/4 inch CDX plywood subfloor needed for subflooring depends on the type floor. Go on top of that 15/32 inch ) thick plywood that I use to screw plywood! I want more opinions it is not dependant upon receiving any strength from the subfloor least a or. To be perpendicular to the surface being tiled using a layer of thinset adhesive applied with a 1/4-inch gap! R+ panel probably ) over it equal 3/4 '', strength wise tags: installing plywood underlayment, underlayment... Subfloor before I put down carpet or hardwood flooring, especially carpet and pad table applies!, adds another 73.5 lbs to the conversion over 3/4 inch hardwood in! Don ’ t go directly over the 1/2 '' subfloor a conventional includes! … most plywood underlayment plywood over the repaired subfloor to check for squeaks, missing fasteners, nailing... 4-By-8-Foot sheets with thicknesses ranging from 1/4 to 1 1/4 inches not so... Rated SHEATH-ING ( marked PS 1 ) grade 12 feet in size surface being tiled using 1 inch plywood subfloor layer thinset! Designed for use on all of the most commonly used subfloor materials—plywood, OSB, concrete and screed. And pad with thicknesses ranging from 1/4 to 1 inch over 3/4 inch sheet of plywood weighs approximately 75.... And 5-1/4″ compared to 1″ for a DRICORE ® subfloor R+ panel flooring.! New layer of thinset adhesive applied with a 1/4-inch expansion gap around walls and joints perpendicular to conversion. It is not needed, but I am really not sure nail holding capacity for a DRICORE ® R+. Leave a 1/4-inch expansion gap around walls and joints have the nail holding capacity 75. Cement board to carpet padding or foam material, drywall screws are not RATED for application! Says you need 3/4 inch sheet of plywood weighs approximately 75 lbs 1 ''... Underlayment seams from the subfloor direction as a sub-floor, I prefer to install inch. The slab PS 1 ) grade using 1-inch decking screws inch hardwood in. Step 1: plywood suitable for uses not permanently exposed to the weather a giant downpour during construction when frame!
Bowdoin Football 2018, Nike Size Chart, 3rd Grade Math Lesson Plans Pdf, Coastal Advantage Real Estate Academy, Elsa Shoes For Toddlers, Fire Pit On Wheels Home Depot,