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51-101 102+ £10.54£12.65 £10.32£12.38 
18mm Kronobuild OSB 3 TG4E Tongue And Groove Flooring Board 2440 x 590mm (8′ x 1.94′) FSC®
18mm OSB 3 with Tongue and Groove profiling is versatile, BBA approved and water-resistant timber panel suitable for load-bearing roofing and flooring applications in dry and humid conditions.
£10.75£12.90 Ex VATInc VAT Add to cart -
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40-79 80+ £8.43£10.12 £8.26£9.91 
There are 1 more images18mm EGGER P5 Tongue and Groove Moisture Resistant Chipboard Flooring TG4E 2400 x 600mm (8′ x 2′) FSC®
18mm Egger P5 tongue and groove chipboard is a moisture-resistant structural grade flooring board. It is generally used in flooring applications as the board’s construction adds strength when panels are slotted together and screwed or nailed down to floor joists.
£8.69£10.43 Ex VATInc VAT Add to cart -
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40-79 80+ £12.27£14.72 £12.02£14.42 
18mm EGGER Peel Clean Xtra P5 Tongue and Groove Moisture Resistant Chipboard Flooring TG4E 2400 x 600mm (8′ x 2′) FSC®
18mm Tongue and Groove Chipboard, commonly known as P5 is a structural grade flooring board highly regarded by builders because of its moisture-resistant properties. 18mm T&G flooring chipboard is typically utilised in flooring applications.
Original price was: £13.25 Ex VAT (£15.90 Inc VAT).£12.65£15.18Current price is: £12.65 Ex VAT (£15.18 Inc VAT). Ex VATInc VAT Add to cart -
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50-99 100+ £8.06£9.67 £7.98£9.58 
18mm Caberfloor P5 Tongue And Groove Moisture Resistant Chipboard Flooring TG4E 2400 x 600mm (8′ x 2′) FSC®
18mm Caberfloor P5 tongue and groove chipboard is a moisture-resistant structural grade flooring board. It is generally used in flooring applications as the board’s construction adds strength when panels are slotted together and screwed or nailed down to floor joists. Generally used on joists with 400mm centres.
£8.40£10.08 Ex VATInc VAT Add to cart -
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54-107 108+ £22.85£27.42 £22.37£26.84 
There are 1 more images18mm Chilean Tongue & Groove Radiata Pine Softwood Plywood B/C TG4 2425 x 600mm FSC®
18mm Softwood plywood by Selex is produced from pruned radiata pine with a class 3 glue and extraordinary strength specifications. It can be used in domestic flooring, for example, on roofs where a high level of engineering, such as high snow loading, is required.
£24.05£28.86 Ex VATInc VAT Add to cart -
18mm CaberDek P5 Tongue and Groove Moisture Resistant Chipboard Flooring TG4 2400 x 600mm (8′ x 2′) FSC®
18mm Tongue and Groove Chipboard, commonly known as P5 is a structural grade flooring board highly regarded by builders because of its moisture-resistant properties. 18mm T&G flooring chipboard is typically utilised in flooring applications. Caberdek provides weather exposure of up to 60 days. Generally used on joists with 400mm centres.
Original price was: £13.25 Ex VAT (£15.90 Inc VAT).£12.99£15.59Current price is: £12.99 Ex VAT (£15.59 Inc VAT). Ex VATInc VAT Add to cart -
18mm P4 Chipboard Loft Panels TG2 LE 1220 x 320mm (4′ x 1) FSC® Pack of 3
18mm P4 Chipboard Loft Panels is designed to be compact in size which means that they are easy to move by hands due to light weight. They can easily fit in loft and tight spaces. With the 18mm Chipboard P4 Loft panel, you will find a seamless installation process and perfect fit for the job as it has a (T&G) tongue and groove section along longer sides of the panel.
Original price was: £15.69 Ex VAT (£18.83 Inc VAT).£14.99£17.99Current price is: £14.99 Ex VAT (£17.99 Inc VAT). Ex VATInc VAT£5.23£6.28£5.00£6.00 Per Sheet Add to cart -
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25-49 50+ £10.65£12.78 £10.43£12.52 18mm EGGER OSB 3 TG4E Tongue And Groove Roofing Board 2400 x 600mm (8′ x 2′) FSC®
18mm EGGER OSB 3 with Tongue and Groove profiling is versatile, BBA approved and water-resistant timber panel suitable for load-bearing roofing and flooring applications in dry and humid conditions.
£10.98£13.18 Ex VATInc VAT Add to cart -
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50-99 100+ £26.36£31.63 £25.82£30.98 
18mm WISA Sprucefloor Spruce Softwood Plywood G/III TG4 2400 x 600mm FSC®
18mm Wisa Sprucefloor is an engineered flooring panel. Produced from Nordic spruce veneers with a Class 3 exterior-grade glue and a purpose-designed tongue-and-groove profile on all four sides. It can be used in domestic and light commercial flooring, offering high strength, dimensional stability and light weight for easy handling and installation.
£27.18£32.62 Ex VATInc VAT Add to cart -
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32-63 64+ £9.95£11.94 £9.75£11.70 
There are 1 more images22mm EGGER P5 Tongue and Groove Moisture Resistant Chipboard Flooring TG4E 2400 x 600mm (8′ x 2′) FSC®
22mm Egger P5 tongue and groove chipboard is a moisture-resistant structural grade flooring board. It is generally used in flooring applications as the construction of the board adds strength when boards are slotted together and screwed or nailed down to floor joists.
£10.26£12.31 Ex VATInc VAT Add to cart -
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32-63 64+ £14.45£17.34 £14.16£16.99 
22mm EGGER Peel Clean Xtra P5 Tongue and Groove Moisture Resistant Chipboard Flooring TG4E 2400 x 600mm (8′ x 2′) FSC®
22mm Tongue and Groove Chipboard, commonly known as P5 is a structural grade flooring board highly regarded by builders because of its moisture-resistant properties. 22mm T&G flooring chipboard is typically utilised in flooring applications.
Original price was: £15.95 Ex VAT (£19.14 Inc VAT).£14.90£17.88Current price is: £14.90 Ex VAT (£17.88 Inc VAT). Ex VATInc VAT Add to cart -
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32-63 64+ £16.66£19.99 £15.96£19.15 
22mm EGGER Protect P5 Tongue and Groove Moisture Resistant Chipboard Flooring TG4E 2400 x 600mm (8′ x 2′) FSC®
22mm Tongue and Groove Chipboard, commonly known as P5, is a structural grade flooring board highly regarded by builders because of its moisture-resistant properties. 22mm T&G flooring chipboard is typically utilised in flooring applications.
£17.35£20.82 Ex VATInc VAT Add to cart -
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41-81 82+ £9.98£11.98 £9.78£11.74 
22mm Caberfloor P5 Tongue And Groove Moisture Resistant Chipboard Flooring TG4E 2400 x 600mm (8′ x 2′) FSC®
22mm Caberfloor P5 tongue and groove chipboard is a moisture-resistant structural grade flooring board. It is generally used in flooring applications as the construction of the board adds strength when boards are slotted together and screwed or nailed down to floor joists. Generally used on joists with 600mm centres.
£10.29£12.35 Ex VATInc VAT Add to cart -
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43-83 84+ £29.64£35.57 £28.08£33.70 
22mm UFH Unfoiled Pre-Routed Underfloor Heating P5 Flooring Grade Chipboard For 12mm Pipe 2400 x 600mm FSC®
The 22mm underfloor heating p5 moisture resistant chipboard is a durable, unfoiled board commonly used in a range of flooring applications. Across the market, it is well known as 22mm UFH chipboard. Channels are routed to suit a 12mm pipe, and are machined at 150mm centres with returns.
£31.20£37.44 Ex VATInc VAT Add to cart -
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41-81 82+ £15.51£18.61 £15.19£18.23 
There are 1 more images22mm CaberDek P5 Tongue and Groove Moisture Resistant Chipboard Flooring TG4 2400 x 600mm (8′ x 2′) FSC®
22mm Tongue and Groove Chipboard, commonly known as P5 is a structural grade flooring board highly regarded by builders because of its moisture-resistant properties. 22mm T&G flooring chipboard is typically utilised in flooring applications. Caberdek provides weather exposure of up to 60 days. Generally used on joists with 600mm centres.
£15.99£19.19 Ex VATInc VAT Add to cart -
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42-83 84+ £35.67£42.80 £33.80£40.56 
22mm UFH Foiled Pre-Routed Underfloor Heating P5 Flooring Grade Chipboard For 12mm Pipe 2400 x 600mm FSC®
The 22mm underfloor heating p5 moisture resistant chipboard is a durable, foiled board commonly used in a range of flooring applications. Across the market, it is well known as 22mm UFH chipboard. Channels are routed to suit a 12mm pipe, and are machined at 150mm centres with returns.
£37.55£45.06 Ex VATInc VAT Add to cart -
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42-83 84+ £30.26£36.31 £28.08£33.70 
22mm UFH Unfoiled Pre-Routed Underfloor Heating P5 Flooring Grade Chipboard For 16mm Pipe 2400 x 600mm FSC®
The 22mm underfloor heating p5 moisture resistant chipboard is a durable, unfoiled board commonly used in a range of flooring applications. Across the market, it is well known as 22mm UFH chipboard. Channels are routed to suit a 16mm pipe, and are machined at 150mm centres with returns.
£31.20£37.44 Ex VATInc VAT Add to cart -
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41-81 82+ £16.09£19.31 £15.76£18.91 
22mm SterlingOSB Zero OSB 3 TG4E Tongue And Groove Flooring Board 2440 x 590mm (8′ x 1.94′) FSC®
22mm OSB 3 with Tongue and Groove profiling is versatile, BBA approved and water-resistant timber panel suitable for load-bearing roofing and flooring applications in dry and humid conditions.
£16.59£19.91 Ex VATInc VAT Add to cart -
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41-81 82+ £32.74£39.29 £32.06£38.47 22mm WISA Sprucefloor Spruce Softwood Plywood G/III TG4 2400 x 600mm FSC®
22mm Wisa Sprucefloor is an engineered flooring panel. Produced from Nordic spruce veneers with a Class 3 exterior-grade glue and a purpose-designed tongue-and-groove profile on all four sides. It can be used in domestic and light commercial flooring, offering high strength, dimensional stability and light weight for easy handling and installation.
£33.75£40.50 Ex VATInc VAT Add to cart -
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18-35 36+ £25.14£30.17 £24.62£29.54 
30mm EGGER OSB 4 HDX TG2 Tongue And Groove Flooring Board 2400 x 675mm (8′ x 2.2′) FSC®
EGGER OSB HDX is a 30mm heavy-duty, load-bearing OSB 4 panel designed for applications to replace a commonly used 38mm Mezzanine Flooring. Its side is wider yet up to 20% lighter, making it easier to install and work with the boards.
Original price was: £26.46 Ex VAT (£31.75 Inc VAT).£25.92£31.10Current price is: £25.92 Ex VAT (£31.10 Inc VAT). Ex VATInc VAT Add to cart -
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10-19 20+ £31.03£37.24 £29.75£35.70 
38mm Finsa superPan Tech P6 TG2LE Tongue and Groove Chipboard Mezzanine Flooring 2400 x 600mm (8′ x 2′) FSC®
Finsa’s SuperPan P6 T&G Flooring system is an innovative, next-generation board that has a unique composition comprising of two external MDF faces with a chipboard core which is without comparison in the market currently.
Original price was: £33.43 Ex VAT (£40.12 Inc VAT).£31.99£38.39Current price is: £31.99 Ex VAT (£38.39 Inc VAT). Ex VATInc VAT Add to cart -
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25-49 50+ £28.08£33.70 £27.50£33.00 
38mm Unilin U7 P6 TG2LE Tongue and Groove Chipboard Mezzanine Flooring 2400 x 600mm (8′ x 2′)
U7 is Unilin’s reinforced P6 chipboard, engineered specifically for mezzanine flooring with higher point-load capacity and stiffness. It meets the P6 threshold but is independently tested and documented well beyond it, for structural flooring performance a generic P6 board can’t guarantee.
£28.95£34.74 Ex VATInc VAT Add to cart
Tongue And Groove Boards
When boards do not lock together properly, the surface never feels solid. You see lines where there should be none. You hear movement where it should be quiet. Fixings carry the stress instead of the board itself. Tongue and groove boards solve that in a simple way. Each board is machined with a shaped edge so one side fits tightly into the next.
What is a tongue and groove board?
A tongue and groove board is a panel with a shaped edge profile. One side has a narrow ridge, called the tongue. The opposite side has a matching slot, called the groove. When two boards are pushed together, the tongue slides into the groove. They interlock. No large gaps. No floating edges.
This edge detail does not change what the core material is. A tongue and groove board can be: chipboard, OSB, plywood, timber boards, specialist acoustic or cement panels. The difference is not the material itself. It is the way the edges are engineered. The profile allows panels to support each other across the joint. That reduces flex between sheets and improves alignment during installation.
What is tongue and groove board used for?
Tongue and groove board is used wherever separate panels need to behave like one surface. The locking edge removes weak seams, so the finished area feels continuous rather than segmented.
In flooring, this system is commonly installed over timber joists to create a stable deck before the final finish goes down. You will often see it in lofts where people want solid storage boards that do not shift underfoot. It is also used as a base layer before carpet, laminate or engineered timber is fitted. In older homes, floors can start to dip or pull apart over time. Boards with a locking edge help bring the surface back into line and keep it steady.
In living rooms and bedrooms, they create walls that look neat and properly finished rather than patched together. In garages, utility rooms and workshops, they provide a stronger lining that holds tight at the joints, even when the temperature shifts.
Ceilings also benefit from this system. In extensions and garden rooms, the locking edges reduce visible gaps and help maintain a neat finish across wider spans. The same applies in sheds and workspaces where boards need to sit flush and remain stable over time.
In more structural areas, tongue and groove boards are used for roof decking, mezzanine platforms and within timber frame construction. The joint can help to distribute the load more evenly between sheets, which improves overall surface performance.
Types of tongue and groove boards
The most familiar option is tongue and groove OSB 3. It has that visible strand pattern, and it is picked when you want a tough structural board that is cost effective and straightforward to work with.
Next comes moisture resistant chipboard flooring. This is the classic choice for chipboard flooring panels with a locking edge. You will notice several branded options and surface variants. Some have a sealed face to help protect the surface during installation. Some are made as a sturdier deck type. The core idea stays the same. A dense board, made to lock together cleanly.
You will also spot tongue and groove plywood. It is a different feel. Lighter look, timber layers / plywood construction, and a more traditional wood based option where plywood makes sense for the build.
There are smaller format chipboard loft panels too. These are designed around loft boarding sizes, so they are easier to carry through the hatch and fit between obstacles. They still use a tongue and groove joint, so the surface stays tight.
Then there are specialist boards. Acoustic flooring panels sit in this section because they also rely on an interlocking edge. They are built to reduce sound transfer, not just to form a deck. Cement particle boards show up as well. These are for projects where a cement based board is needed, while still keeping the benefit of a locking joint. You may also see pre routed boards for underfloor heating chipboard, both foiled and unfoiled, plus fire retardant options in the P5 range.
Thickness options range from 18mm up to 38mm, with common choices such as 18mm chipboard flooring and 22mm chipboard flooring widely available. Selected underfloor heating panels are routed to suit 12mm or 16mm pipe systems.
Many flooring boards are supplied in practical 2400mm x 600mm formats, with additional sizes such as 2400mm x 1200mm, 2400mm x 675mm and smaller loft panels around 1220mm wide for easier handling.
The range includes structural grades such as OSB3, OSB4, P4, P5 and P6, manufactured to recognised standards including BS EN 300, BS EN 312 and EN 636. Moisture resistant, acoustic and fire rated options are available, including boards rated up to Euroclass B, with selected lines classified as D-s2,d0. Formaldehyde classification is typically E1.
Finishes vary by product and may include sanded, unfinished, veneer faced, foil topped or factory coated surfaces. FSC-certified lines are available across selected boards.
Benefits of tongue and groove boards
- Boards lock together to create tighter, cleaner joints.
- Load is shared across panels, not just carried by fixings.
- Joints stay closed with less movement over time.
- Installation is quicker and more controlled.
- The finished surface looks more even and consistent.
- Edges are better supported than standard square sheets.
- Suitable for structural and interior applications, depending on board type.
Why choose our tongue and groove panelling?
Sheet Materials Wholesale offers high-quality tongue and groove panelling selected for reliable performance on site. The stock is held in UK Warehouse ready for a quick dispatch.
Price matters, especially when quantities increase. We keep a competitive price on single sheets and offer trade discounts when the order grows. If you are working at scale, bulk orders and pallet deals bring the wholesale price down and deliver proper value for money. Volume discounts are available, and quotes are turned around fast, so you can cost your project with confidence.
Delivery is set up to work around real builds. We supply across the UK with fast nationwide delivery to site or residential addresses. Next-day delivery is available on selected lines when timing is tight. Every order includes order tracking and a VAT invoice. Our stock is project-ready and responsibly sourced, so you can focus on the build.
If you know what you need, we can get it moving. Tell us the quantity and delivery postcode, and we will price it competitively. Working on a larger job? Ask for a bulk quote and see what the numbers look like. UK stock, fast response, no delays.
FAQ
Where to buy tongue and groove boards?
You can order them directly from Sheet Materials Wholesale through our website.
How to secure tongue and groove boards?
Fix through the face or at an angle through the tongue, depending on the job. Use suitable screws for the material and make sure the boards are fully supported underneath. Keep joints tight as you go.
How to install tongue and groove boards?
Start from a straight edge. Fit the first board level, then slide the next one into place and secure it. Work row by row, checking alignment as you move across.
How to remove tongue and groove wall boards?
Start at the end of a run if possible. Gently prise the first board away to release the joint. Once the edge is free, the rest will separate more easily.
