We recommend hiring a professional contractor for this task. They will pay you $100 to try one of their roofers, in addition to the $20,000 guarantee that Roofing Insights backs up each of their contractors with! That’s considered to be the minimum. An exception to this standard, however, may occur if you intend to install slate, concrete or tile shingles on your roof. This kind of plywood can be used on roofs with minimal load; steeper rather than flatter roofs will have lesser load per sq. However, each option has its own benefits and downsides and it’s a good idea to know about them so you can make an informed decision. It’s not perfect like the A-grade meaning you can expect to see imperfections. 11/32. However, they have a preference for plywood. However, you may need to consider bolstering the plywood thickness for a roof that has a higher load. When my new roof was going on in July '12 I took a look at some of the plywood cuts. It’s so important that you have to arm yourself with knowledge and know everything there is to know so you’ll know the best way to utilize it for your roof. This material separates the roofing from the substrate, provides secondary weather protection and guides drainage down the side of the roof. If your roof is more on the flatter side, then it’s expected to have a heavier load. You won’t see imperfections. Roof sheathing comes in grid-marked 4-by-8-foot sheets, and should be installed perpendicular to the frame. I've never used commodity OSB on a roof but it's probably fine in 5/8" thickness, and possibly in 1/2" thickness. About 1% of these are plywoods. We’ll discuss plywood vs OSB more later. You don’t want to buy too much because that will be an expensive waste. Before we start talking about the different options, it’s important to note that plywood has different grades: This is the highest grade there is. One of the things to determine for a new roof is how much plywood you actually need. Multiply the length of the roof in feet by the width of the roof in feet to find the area of the roof in square feet. Why is plywood used in roofing? Ply is a strong durable panel manufactured from plantation grown Pinus radiata veneers bonded with phenolic (exterior, marine) Type A bond adhesive. They also have markings at intervals of 16 and 24 inches so you’ll know exactly where to nail. But the common plywood is 3.2mm~21mm . Working on the roof is dangerous. The typical thickness range for sheathing is 3/8 to 3/4 inch. It might be tempting to do it yourself especially if you’re looking to save money. Over time, shiplap fir wood resin dissipates, causing the boards to shrink, crack, form knot holes, and become extremely brittle. CDX works fine in 1/2" or 5/8" thickness. On anything much bigger then I tend to go for 18mm. How many square feet are there in a 4×8 sheet of plywood? Thickness of Roof Sheathing, Table 9.23.15.7.B. Ecoply is manufactured under a third-party-audited quality control programme and is certified by the Engineered Wood Products Association of Australasia (EWPAA) as compliant with AS/NZS 2269 Plywood Structural. The finish on plywood can vary depending on the timber used, some will have knots and graining which can be an attractive feature. Adding 20% is industry practice. 49 8 ... plywood roof sheathing 3/4 plywood 4x8 1/2 plywood 4x8 plywood subflooring 3/4 sheathing plywood 3/4 in. Thickness. What if you have a complicated roof wherein you can’t measure this way? The industry offers a thickness of anywhere from 5/16 inch to ¾ inch. So, dividing the area of the roof by 32 will give you the number of sheets needed. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. You can create more damages. Alibaba.com offers 961 roofing plywood thickness products. halbrindley says: March 24, 2020 at 5:49 pm Hi Chris. Most roofs are spaced at least 20 inches apart. Veneered construction gives these PureBond Birch Plywood panels the strength, flatness and rigidity to satisfy the most discerning craftsman. 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. Panel edges shall have approved tongue-and-groove joints or shall be supported with blocking, unless 1 / 4 -inch minimum thickness underlayment or 1 1 / 2 inches of approved cellular or lightweight concrete is placed over the subfloor, or finish floor is 3 / 4 -inch wood strip. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness. 3.6 mm (3) 5.5 mm (7) 9 mm (7) 12 mm (10) 18 mm (10) 25 mm (3) Manufacturer Name. Simply put, it’s not safe. Mitre 10's Plywood range comes from leading brands and in a wide range of grades and sizes. Rating for Roof Sheathing When Applying CSA O325. Get Free, No-Obligation Quotes, It only takes 2 minutes to fill out the form. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Range. See More + Plywood products as a substrate for roofing for residential, commercial and industrial buildings such as house, hostels, hotels, offices and factories. Tip: Plywood with fewer plies is weaker than a plywood with more plies, even if they have the same thickness. Spans up to 48 inches require 3/4-inch plywood. In this case, you need 47 sheets (rounded off from 46.88). About 0% of these are Steel Sheets. Mixing thicknesses is not preferred either, but if you use the proper underlayments and decent shingles, particularly archatectural, you aren't likely to … For most lightweight roofing materials, use 5/16-inch plywood for spans up to 20 inches, and use 1/2-inch sheets for spans up to 32 inches. Sheathing should be a minimum of 19/32-inch thick. Generally 12 – 15mm ply is the most commonly used thickness. Where roofing is being renewed over boarded decking, 12 mm panels are suitable as a substrate for membrane roofing in both public access and low traffic areas, however attention must be given to continuos supports under all edges and the substrate thickness required for the new plywood overlay. The standard width is 4 feet. Speaking of OSB, it’s a top choice of homeowners looking for something more affordable than plywood. A professional will always do a better job provided that you hire the best one for the project. Find the Area of a Roof. Metal Roofing Thickness Recommendations that Include Paint. Plywood is often sold in 1 / 4 “, 1 / 2 “, or 3 / 4 ” nominal thicknesses, but the actual thickness is often 1 / 32 ” thinner. The only thing that may impact this life expectancy would be a significant weather event or improper installation. That’s considered to be the minimum. 1. It’s a top choice because of its characteristic wherein it expands evenly when exposed to water unlike OSB wherein only the edges expand. Do you want to save money in the long run? When you inquire or quote for plywood, you must state what thickness you will buy or sell clearly . Need help with your next OSB project? Also known as sheating, decking is basically where the roofer attaches the shingles or whatever your chosen roofing material is. Plywood is made out of laminated sheets of veneer. Obviously, you don’t want to buy too little because that will mean another trip to the supplier. Yes, there are several different material options and types of roof plywood. Look for something that’s graded as Exposure 1 or Exterior. Metal panels are attached to the sheathing to keep it dry. As good practice, order a few sheets more than that to cover for mistakes and wastage. Lumin (4) ... Hardwood Plywood Poplar Core FSC 2440 x 1220 x 5.5mm. If it does, it can stay that way even if you dry it out. Table 9.23.15.7.A. Plywood panels used as exterior wall and roof sheathing perform multiple functions; they can provide resistance to lateral forces such as wind and earthquake loads and also form an integral component of the building envelope. Do you want to stay away from potential accidents? If you don’t have a gable roof, get the square footage of each slope and add them. Hence, the cost to install it is lower. Model #185109. About 0% of these are Steel Sheets. posted on Mar 23, 2020. In fact, they’re rated just about the same when it comes to how strong and durable they are. A roof that lays practically flat will have a much heavier load than a steeper roof that allows rain, snow, and ice to roll right off. It doesn’t matter how experienced of a DIYer you are. Nominal Product Length (ft.) 100. The plywood is nailed at roughly 150 mm spacings, ensuring the ends finish on the centre line of a truss. This characteristic makes it a top choice for areas with unpredictable weather. Item #12181 Model #185109 Related Products. This is a popular option because it presents homeowners with functional but affordable roof sheathing. Alibaba.com offers 961 roofing plywood thickness products. Plywood thickness ranges from 0.4mm~100mm . While plywood remains a good and viable option, the fact remains that OSB is now the preferred choice. Depending on the roof rafter spacing, different preparatory layers of different thicknesses and materials are used. We made this process easier. Multiply the width and length of each slope and you should get the square footage of that slope. Besides if you’re not satisfied with their job, a professional will make it right to ensure the best results. As a warning, it’s considered by some to be inferior in quality as compared to plywood. In addition, hiring a professional can help you save money in the long run. A 4×8 sheet of plywood is 32 ft 2. Open spaces form between the once tightly-fitted shiplap boards. ... Thickness. What we don’t recommend is for you to hire the first contractor with a good offer. Available either untreated or H3.2 CCA. The ideal thickness for the standard rafter spacing of 24 inches is 5/8 th of an inch. Depends on the size of the shed. Feel free to call our friendly team on 01752 692760, they’ll happily help. The minimum thickness of plywood used for roofing is 3/8 th of an inch. Standard roof sheathing, which consists of 4-by-8 sheets of plywood or oriented strand board, or OSB, is 1/2-inch thick and attaches directly to the roof rafters or the roof trusses. You can get plywood sheets with a length of up to 10 feet. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness. Let’s say that your roof has a total of 1,500 square feet. Today, a shiplap roof is usually 60+ years old. It is certainly not preferred by professionals interested in quality. 15/32. foot and with a maximum of spacing of 16 inches between rafters. But even so, it results to a roofing system that minimizes the leakage of air. Multiply that by 2 if you have a gable roof and that’s the total square footage of your roof. Minimum Thickness Most roofs will be sheathed in plywood at least 3/8 inch thick. R-VALUE* 3.0" 75 mm 1.9 9.0 3.5" 89 mm 2.0 12.0 … Doc Retrieval Alibaba.com offers 332 plywood thickness for roofing products. Do You Need Permits To Remodel a Bathroom? (b) a continuous sheet of aluminum not less than 0.61 mm in thickness. #OvercomingObstaclesScholarship: Let’s Put Mental Health on the Agenda and Change the Narrative on Social Media Together! This means that there’s no need to use roofing felt. Plywood is often sold in 1 / 4 “, 1 / 2 “, or 3 / 4 ” nominal thicknesses, but the actual thickness is often 1 / 32 ” thinner. Eugene Sokol. Just to get one thing straight, either one will work just fine. According to Dmitry Lipinskiy, owner of Roofing Insights, there is a 5% chance that older homes will need a completely new decking system when their roofs are repaired. You’ll know how it’s used for decking and sheating. In roofing, plywood can be used as roof decking. Nominal Product Thickness (in.) Item #12246. Roof decking bakes in the sun, freezes in the cold, and may be surrounded by moisture laden (potentially salty ocean) air . If it’s say a smallish garden type shed around 3 or 4 meters by 2 or 3 meters then I’d probably use 12mm WBP plywood. What is the Actual Thickness of a Sheet of Plywood. While the subfloor rests comfortably in conditioned space (typically). Model #34CC. To find the amount of plywood needed to cover a roof start by finding the area of the roof. This material is COPYRIGHT © QUEEN'S PRINTER FOR ONTARIO, 2008-2018. This minimum will only work if the rafters are set 16 inches apart at most and if the roof doesn’t have too much load. It has been estimated that OSB has a stronghold of ¾ of the market share, mainly because it’s the more affordable option. The Ontario Building Code | Thickness or Rating 9.23.15.7. In addition, the roof plywood may need h-clips to hold the plywood in place and create a sturdier decking especially on any rafter spacing of 24 inches or greater. Depending on thickness, plywood is also approximately two pounds or more lighter per sheet. In this case, add 150 to get a total of 900 square feet. You need to shop around in order to get the best quotes to choose from. Uses For many projects such as shelves, loft boarding, subfloors, and joinery, 18mm sheets will be ideal. This is largely regional though, so check with your local building code department. Measure the floor area of everything covered by the roof. Check out the Roofing Insights Directory! The thickness of the roof deck in relation to the span During fastening of the wooden roof constructions, the roof rafter spacing depends on temporary and constant roof loads an on form of roof. 1/2″ is the minimum, but 3/4″ was standard in the part of the country I was in. In this case, you can’t use a 3/8 inch thick sheet. The savings you’ll get per sheet will really add up. When i was framing was ccpts for overhangs and cdx for the rest of the roof. Plywood's Advantage over OSB? Thickness or Rating (1) The thickness or rating of roof sheathing on a flat roof used as a walking deck shall conform to either Table 9.23.14.5.A. You’ll also know the different size and thickness requirements. The ideal thickness for the standard rafter spacing of 24 inches is 5/8 th of an inch. Metal Roofing Gauge and Thickness - What You Need to Know. Do you need to talk about your project before placing your order of plywood sheets? 23/32 in. Item #12181. If you live in a townhome with other townhomes around you, building codes may dictate that you use FRT or fire-retardant plywood. Be sure to also read our article about getting free roof repair estimates. To secure it, measure it, roll it out over the plywood, cut it to the dimensions of the roof with a roofing or utility knife and finally hammer it securely to the plywood with 1/2-inch roofing nails. Once the area is known, divide by the area of a 4×8 sheet to find how much sheathing is needed. Complete the form with the basic details asked and send it. A wide variety of roofing plywood thickness options are available to you, such as type. The minimum thickness of plywood used for roofing is 3/8 th of an inch. This option is basically a specialized plywood grade. or Table 9.23.15.7.B. Is there a better choice between the two or will either one work just fine? (4) All edges of sheathing described in Sentence (3) shall be support ed by blocking or framing. Oriented standard board (OSB) is created much differently. Roof plywood is the most commonly used decking for roof shingles. You need to measure your roof using a tape measure. Roof sheathing products come in a variety of different thicknesses, which are chosen based on the weight of the roof and the distance between joists. 23/32 in. Plywood thicknesses for roofs start at 3/8” in areas with light load requirements on rafters at 16” centers. or Table 9.23.14.5.B. Other types of shingles, including number 1 wood, cedar shake and tile are thicker, although the thickness depends upon the individual brand of shingles you select. There’s a formula to be applied. This material separates the roofing from the substrate, provides secondary weather protection and guides drainage down the side of the roof. Plywood Thickness. Compare; Find My Store. Rona carries plywood in all grades and sizes to help with any construction project. While not as good as A-grade and C-grade, it’s good enough to be used for a plywood sheet’s underside. There is definitely rust on the steel frame, but they are still solid. I can 't remember the grade stamp, but I know the outside plys were clear. The inner core has thick, square cuts of wood that are glued together to create the strong core. For steep slope roofing (e.g. Once the spacing hits 24 inches, a 5/8 inch thick sheet is more ideal. An … A lot of people still think that plywood is higher in quality and in some cases, it is. Thickness is the key specification of PLYWOOD. Since it doesn’t require a roofing felt, the installation process is made easier. Inventory includes: marine, construction, engineering, decorative, and architectural grades, ranging from very high face grades to seconds and … This sentiment is shared by representatives from TAMKO and Cellotex – 2 known manufacturers of roofs. Once you have the area you can divide by the area of a sheet of plywood to find the number of sheets needed. sheathing plywood . You’re in luck if you have a conventional gable roof because it should have slopes on each side that are identical in dimensions. As a homeowner, if you find yourself in this position, know that when you install a new decking system, you will have to decide between using plywood or OSB . You will also need to consider the thickness of your plywood sheets. Comparing plywood used as subflooring, to plywood used as roof decking is a mistake. This site is not an offical copy or maintitned by the Government of Ontario. 3/8 Cat Ps1-09 Square Structural Douglas Fir Sheathing, Application as 4 x 8. Roof decking is the material that lies on top of the main roofing structure, and the underlayment and roof covering are applied on top. That, in a nutshell, is the one big advantage plywood holds over OSB. A half inch CDX plywood is often used with rafter with 24-inch spacing. Use it to create strong walls, roofs, and floors. Exposed fastener corrugated steel roofing: .014″ – .018″ Exposed fastener corrugated aluminum roofing: minimum .024″ Steel standing seam: minimum .024″ Aluminum standing seam: minimum .032″ Steel shingles: minimum .0145″ Aluminum shingles: minimum .0185″ Steel tile: minimum .024″ Aluminum tile: minimum .032″ … Metal Roofing • R-Values from 10.2 to 47.4 • Single layer of sheathing For Shingles and or Plywood, FRT or RB OSB or THICKNESS P.S.F. Plywood sheets are differentiated according to size, thickness, and performance characteristics. In this case, the thickness and rafter centres will be interdependent and related to the imposed design loads. With 24-inch truss/joist spacing, the National Wood Flooring Association recommends 1-inch OSB underlayment, compared to 7/8-inch plywood. Even the Engineered Wood Association agrees to this. or Table 9.23.14.5.B. It has its own strengths. The requirements for roof plywood vary from city to city but generally need to be at least 1/2 inch thickness. Plywood flooring & roofing (7) Plywood exterior (4) Plywood structural other grades (2) + More product types - Less product types. Why did you need to support the ceiling? (3) asphalt-coated or asphalt-impregnated fibreboard not less than 11.1 mm thick conforming to CAN/ulc-S706, "wood Fibre Thermal insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation for Buildings", is permitted to be used as a roof sheathing over supports spaced not more than 406 mm o.c., provided the roofing consists of, (a) a continuous sheet of galvanized steel not less than 0.33 mm in thickness, or. 3/4-in Common Southern Yellow Pine Plywood Sheathing, Application as 4 x 8. (2) The thickness or rating of roof sheathing on a roof not used as a walking deck shall conform to either Table 9.23.15.7.A. Item #471096. What plywood should you use for a roof? You’ll also know about the different material options. If they know that you’re shopping around for the best deal, you can expect to get the best quotes. If you take a look at a sheet of OSB, you’ll notice the surface isn’t extremely smooth. Thickness … The bottom line of the middle section gives the allowed exposure. What Size Plywood should You Use for your Roof? Understandably, it’s the most expensive. (2) The thickness or rating of roof sheathing on a roof not used as a walking deck shall conform to either Table 9.23.15.7.A. But still, no one will blame you if you choose plywood over OSB. (1) The thickness or rating of roof sheathing on a flat roof used as a walking deck shall conform to either Table 9.23.14.5.A. Panel thickness will also affect permeability - using the 2 perm variable of 7/16ths OSB sheathing, at 3/4" thickness the permeability drops to 2/3rds of a perm. for subfloors. 19/32. The job will also be done right which will minimize mistakes and wastage. You can expect to receive around 4 of the best quotes that you can choose from. If you ensure the plywood is in good condition and well protected before placing the metal roofing, you can expect the average life expectancy of your metal-on-plywood roof to be 40-70 years. Get Ready to Have No-Obligation Talks With Contractors, © 2020 All rights Reserved Contractor QuotesDeveloped By ITVolcano. The main floor area is 600 square feet and the wing floor area is 150 square feet. To secure it, measure it, roll it out over the plywood, cut it to the dimensions of the roof with a roofing or utility knife and finally hammer it securely to the plywood with 1/2-inch roofing nails. Unlike with plywood siding, the plywood sheet to be used for sheathing should be at least 3/8 inch thick. What is plywood? Plywood span ratings indicate the distance between framing members for roofing and flooring … followed by the plywood thickness. This minimum wouldn’t work if you have a flat roof. The number you’ll get is the number of sheets that you need. Since they can ensure the best results, you will get your money’s worth. This information makes it easier to coordinate with pros. foot and with a maximum of spacing of 16 inches between rafters. I thought perhaps he made a mistake but no this is what he is proposing. The minimum plywood or non-veneer (O.S.B or wafer board) deck thickness for low-slope roofing (i.e., membrane roofing) shall be a minimum 12.7 mm (1/2")and as indicated in the applicable the BC Building Code (latest edition). The outer layers are thin and enclose the wood, forming a thick piece of wood. It doesn’t swell when it gets wet unlike OSB. OSB is also more affordable. In this case, plywood should be a minimum of 3/8 inch thick. Make sure that you add for the slope of the roof. In this case, you need 29 sheets (rounded off from 28.13). for pricing and availability . If your roof carries a heavier load, like if there’s less pitch and/or it snows in your area, a roofer may recommend the use of the ¾ inch variety. Mastered DIY tasks working with plywood siding the plywood is 32 ft 2 this minimum wouldn ’ extremely!, hiring a professional can help you determine how many square feet and the wing floor is. The amount of plywood did you use for your roof previous screws the country I was in know the... As countertops, furniture, and performance characteristics ll have a flat.... Or should you use for your roof has a total of 900 square and. Vs OSB more later how your roof form with the basic details asked and send it is selected... This standard, however, you ’ ll have a structural role, a 4×8 to. Length by the width and length of each slope of the roof reviewing your case and get. Plywood holds over OSB material is this article for you to hire the best quotes to from! Of veneer you now have a gable roof and that ’ s graded as Exposure 1 exterior. From previous screws 3/4 sheathing plywood 3/4 in minimum wouldn ’ t use a 3/8 inch thick.! About getting free roof repair estimates sheathing with staples ; 8d ring-shank nails should installed. 600 mm up to 10 feet a continuous sheet of plywood used for roofing 3/8... Know the outside plys were clear as a warning, it should a. City to city but generally need to be at least 3/8 inch.... S the total square footage of that slope the thickness of plywood need! Of grades and sizes the thicker sheets naturally provide greater strength, flatness and rigidity to satisfy the commonly! Been an ongoing debate one big advantage plywood holds over OSB you ’ get. Design loads thick sheet is actually 23 / 32 ” thick © 2020 all rights Reserved QuotesDeveloped... X 4-ft x 8-ft Treated plywood sheathing, Application as 4 x 8 results, you must state what and! That ’ s good enough to be inferior in quality as compared to 7/8-inch plywood sheating decking., and hot-pressing them down right which will minimize mistakes and wastage I need for My.... Be a minimum of 3/8 inch thick rounded off from 28.13 ) trip to the sheathing yourself or you... Many sheets you need for your roof tempting to do is to the... Even if you ’ ll see finished outer layers are thin and enclose the wood, forming a thick of! Choose plywood that ’ s underside CDX for the rest of the best quotes to choose a inch. Feel more comfortable working with plywood a popular option because it presents homeowners with functional but affordable roof with. Thicker sheets naturally provide greater strength, flatness and rigidity to satisfy the most used. Add them rated areas, 3/4-inch-thick plywood is also approximately two pounds more! This way thickness - what you need for your project before placing your order of makes... Properly considered so you ’ ll notice the surface isn ’ t swell when it comes to strong. Sheet will really add up wood product has a D-grade we don ’ t require a structure... Coordinate with pros Actual thickness may vary measuring the plywood sheet to be used for is. As roof decking is a mistake and Asphalt roofing manufacturers Association, recommend.! The ends finish on the roof feet and the wing floor area is 10 by 20 feet and the floor... It a top choice for areas with unpredictable weather a minimum of inch. Requirement to use the form that you can divide by the area of a sheet! More comfortable working with plywood Southern Yellow Pine plywood sheathing, Application as 4 x.! Thickness options are available to you, such as e2, e0 and! Must state what thickness you will buy or sell clearly by professionals interested in and! Sheet will really add up impact this life expectancy would be a minimum of inch. And CDX for the best one for the rest of the roof blame you if you take a at! This minimum wouldn ’ t use a 3/8 inch thick load requirements on rafters at 16 ” centers,... Its back has a D-grade dividing the area of the roof a mistake no. The wing floor area is known, divide by the area of a 4×8 sheet of plywood be! As compared to 7/8-inch plywood and sizes to help with any construction project,! Much differently to cover a roof that has a barrier that resists but... That there ’ s exposed to fire steeper rather than flatter roofs will be sheathed in plywood at least 8. Sheathing described in Sentence ( 3 ) shall be supported by blocking or framing off from )! You live in a nutshell, is the most commonly used thickness steeper rather than flatter roofs will be and... Osb more later send it ; 8d ring-shank nails should be a of... Affordable than plywood and related to the imposed design loads plywood with fewer plies is weaker than a sheet! Type of sheets, it is is 32 square feet in a nutshell, is as. Long run PureBond Birch plywood panels the strength, flatness and rigidity to satisfy the commonly... Do the sheathing yourself or should you use for your roof using a tape measure do a better provided! Sheet is more on the Agenda and Change the Narrative on Social Media!... Tend to go for 18mm of homeowners looking for something more affordable than plywood plywood makes it a top for... Range from 1/8-inch to 3/4-inches industry offers a thickness of your plywood sheets total footage... 3/8 th of an inch a popular option because it presents homeowners with functional but affordable roof sheathing all and... Of aluminum not less than 0.61 mm in thickness cover a roof rafters! The cost to install slate, concrete or tile shingles on your builder how. Birch plywood panels the strength, flatness and rigidity to satisfy the discerning... €¦ I spent 4 years representing a roofing structure steel frame are drilled holes from previous screws design.! Company in NC you to compare the two or will either one will work just fine 4x8 1/2 plywood 1/2... A popular option because it presents homeowners with functional but affordable roof sheathing March... But they are still solid plys were clear a DIYer you are almost -! Plywood span ratings indicate the distance between framing members for roofing is to. Largely regional though, so the grade stamp, but your timber merchant will be ideal was..., planks and wood boards process is made out of laminated sheets of plywood a warning it! Used decking for roof shingles is recommended, regardless of rafter spacing, thickness., Wise-Spruce plywood sheets from 600 mm up to 10 feet called hydrolysis! Saw no voids along roofing plywood thickness cut edges, so the grade was likely AB slope and them... Of roofing plywood allows to settle roof effectively and cost-effectively but plywood thickness are... Anywhere from 5/16 inch to ¾ inch gluing them together, and hot-pressing them.! Using a tape measure ranges from 600 roofing plywood thickness up to 1500 mm comes! )... hardwood plywood Poplar core FSC 2440 x 1220 x 5.5mm choice the. But your timber merchant will be ideal Agenda and Change the Narrative Social. Anywhere from 5/16 inch to ¾ inch when it gets wet unlike OSB exception to standard... Of roofing plywood thickness options are available to you, such as e2, e0, and joinery 18mm! Board has been an ongoing debate can make the right choice on the flatter side, it! That you see on this page Flooring … followed by the plywood thickness attached to the yourself. The steel frame are drilled holes from previous screws the thicker sheets provide... Markings at intervals of 16 inches between rafters rigidity to satisfy the most commonly decking. Plywood needed to cover a roof with rafters spaced at 24 ” centers create the strong core of inches... Complete the form ” sheet is more ideal roofing installers have never questioned it not... Reviewing your case and will get your money ’ s exposed to fire,... Can choose from you are of roofs to hire the first contractor with a good offer slope. Some will have knots and graining which can be used for decking and sheating the spacing 24., add 150 to get one thing straight, either one will blame you if you ll... Thicker sheets naturally provide greater strength, flatness and rigidity to satisfy the most discerning craftsman expensive waste substrate... The predominant residential roofing substrate became 1/2″ CDX plywood it a top choice of homeowners looking for that! Used thickness it might be tempting to do it yourself especially if you intend to it... Is largely regional though, so the grade was likely AB of laminated sheets of plywood a flat.... Is 1/2-inch, but plywood thickness options are available to you, such as shelves loft! Planks and wood boards as ply is the Actual thickness may vary measuring the plywood is,. And joinery, 18mm sheets will be properly considered so you can expect to a... Anything much bigger then I tend to go for 18mm job, a 4×8 sheet aluminum! Are several different material options and types of roof plywood is recommended regardless. Although it ’ s the total square footage of each 4×8 plywood to. Thicknesses between 3mm and 25mm, No-Obligation quotes, it should be getting paid for it right.