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How thick is tongue and groove?

Author

Sarah Smith

Published Jan 14, 2026

Tongue and groove provides interlocked cladding which is strong adn flat. Please note the nominal size is different to the finished size: 16mm x 125mm, with a finished thickness of approx 12mm and a cover of approx 114mm. 19mm x 100mm, with a finished thickness of approx 15mm and a cover of approx 85mm.

What thickness does tongue and groove come in?

Overlap/ Tongue and Groove Wooden Sheds

Overlap-clad shed walls are normally 7-8mm thick, whilst tongue and groove and shiplap boards tend to be around the 12mm mark.

How thick should tongue and groove boards be?

The general rule says you should have a square tongue that's roughly one-third of the stock thickness and centered on the edge. Working with 3⁄4″ stock, that plays out to a 1⁄4″-thick by 1⁄4″-long tongue, and a matching groove.

What size does tongue and groove wood come in?

Available in Four sizes from 1.8m to 4.20m, These strong 28mm thick boards are suited to an all manor garden projects such as shed construction, Retaining walls and much much more.

What are the sizes for tongue and groove?

The boards can be supplied in 8 ft., 10 ft.,12 ft.,14 ft.,16 ft., or a random mix of these lengths. For projects that can handle a little more character, an economical option may be our cabin grade material. These boards come in random lengths of 1″ x 6″ and/or 1″ x 8″.

38 related questions found

How do you measure tongue and groove width?

How to Calculate Tongue and Groove Flooring

  1. Divide the floor area into rectangles. ...
  2. Measure the width and length of each rectangle. ...
  3. Multiple the width by the length for each rectangle to determine the surface area. ...
  4. Determine the area of an individual piece of tongue and groove flooring.

How much does tongue and groove cost?

Tongue and groove typically costs between $1.25 — $1.60 per linear foot, or around $2.50 to $3.00 per square foot.

Is Redwood good for flooring?

The best quality redwood comes from the heartwood, which is resistant to deterioration due to sunlight, moisture, and insects. Because of the length, redwood boards can provide a distinguished appearance without a lot of cuts, boards and planks to interrupt the flow.

Should tongue and groove be glued?

+1 on no glue in the T&G joint. The individual boards need to be able to expand contract individually (That's the advantage of T&G). To solve the exposed unfinished tongue issue, you can pre-stain and finish the tongues before assembly. +1 on no glue in the T&G joint.

Should I cut the tongue or groove first?

Step 1: Generally speaking, it's easier to cut the groove of a T&G joint first, then mill the tongue to fit the groove. A 1/4-in. straight bit or spiral upcut bit makes an ideal groove-cutter into the edge of a workpiece.

What kind of wood is used for tongue and groove?

Type of Tongue and Groove Boards to Use

The most common woods used for the wood panels include pine, spruce, or cedar. The prices vary based on the woods, averaging $2.50 to $4.00 per square foot.

What is the best wood for tongue and groove?

White Cedar

Because it's a soft wood, it's easy to cut and work with, but is better used for tongue and groove paneling where there is no need for nails. Another major advantage to using white cedar is that its natural oils help it to resist rot, while giving it a natural ability to repel insects, including termites.

Can you buy tongue and groove boards?

Tongue and groove Appearance Boards at Lowes.com.

Can you install tongue and groove over drywall?

If you're looking to reboot the atmosphere in a living room or bedroom by covering the existing drywall with tongue-and-groove boards, the good news is that there are no codes prohibiting it. In fact, the fire-resistance of drywall balances the propensity of wood to burn and makes the room safer than wood alone.

What is the difference in shiplap and tongue and groove?

In a nutshell, shiplap boards rest on top of each other and overlap, while tongue-and-groove planks join together and interlock. Another popular technique is to just do a simple “planked wall”. That's just slightly-spaced apart strips of plywood, nailed to a surface.

Can you use tongue and groove as shiplap?

While shiplap is the catchiest design term you'll hear and see most often, there are actually several additional types of wood paneling, from beadboard to board and batten to wainscoting. However, the closest style to shiplap is tongue and groove.

Does tongue and groove make composite decking?

Composite Tongue and Groove Boards

As one of the most popular types of decking, dozens of companies produce composite decking, but only a handful make planks with a tongue and groove profile.

How do you treat a tongue and groove board?

If you are seeking a natural look for your tongue and groove ceiling, the easiest solution is a simple treatment with linseed oil. This can be accomplished with a rag or large brush by wiping or brushing the linseed oil directly onto the wood.

How much tongue and groove pine do I need?

If you are using 1×8 T&G, the face coverage is 6.875, therefore you would multiply your square footage by 12 and divide by 6.875. Finally, always account for about 5% waste factor so that you do not run short. To do this, multiply your final lineal footage by 1.05 and that will be the amount to order.

How much is tongue and groove per square foot?

The average cost to professionally install tongue and groove pine ceiling planks, including material and labor fees, ranges from $4 to $8 per square foot. If you plan to install your ceiling as a DIY project, expect to pay $3 to $4 per square foot on average.

How do you figure board feet for tongue and groove?

Multiply the Square Footage x 12 and then divide by the amount of coverage (in inches) each piece of wood will cover. Example: How many linear feet of 1x6 tongue and groove lumber will it take to cover 500 square feet of ceiling? Keep in mind that the coverage on 1x6 T&G is only 5 inches once it is fit together.

Can you use pine tongue and groove outside?

While tongue and groove cut pine is most commonly used for interior walls, it is suitable for your exterior siding needs.