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builders merchant
builders merchant

Treated Timber 4×2 | 100mm x 47mm

SKU: TT4X2100X47MM
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Treated Timber 4×2 | 100mm x 47mm

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Structural Grade Treated Timber | 100mm x 47mm (4×2)

Our large stock of Treated Timber is the perfect structural material for a variety of building applications, such as roof and floor joists, partitions, and timber framing. Along with this, our Treated Timber is EN14081-2  Certified, making it perfectly suitable for both indoor and outdoor projects.

As well as our timber receiving the highest quality treatment, we sourced the highest quality Scandinavian Whitewood Spruce, a slow-growing tree that produces tight growth rings, leaving the finished timber with an extremely high level of stability and a premium finish. The process of manufacturing the timber is extremely environmentally friendly, with all of the wood is responsibly sourced. The timber then gets kiln-dried and treated, to ensure maximum protection against all forms of decay.

Our Treated Timber is available in a variety of sizes and lengths. However, we can also cut any Timber to your required length or pack together as many pieces as you require, just select the custom cut of your choice when purchasing.

Versatile and Long-Lasting Treated Timber

Our 100mm x 47mm Treated Timber 4×2 is the perfect choice for a wide range of indoor and outdoor projects. Whether you’re building a new shed, fence, or decking, our treated timber is guaranteed to stand the test of time. With a durable design and long-lasting finish, this timber is perfect for anyone looking for a versatile and reliable building material.

Easy to Work With Treated Timber

Our 100mm x 47mm Treated Timber 4×2 is not only durable and long-lasting but also easy to work with. Whether you’re a seasoned professional or a DIY enthusiast, this timber is easy to cut, shape, and join, making it perfect for a wide range of building projects. With its versatile design and ease of use, this timber is a must-have for anyone looking to build their dream project.

High-Quality and Affordable Treated Timber

At our store, we believe that high-quality treated timber should be affordable and accessible to everyone. That’s why we offer our 100mm x 47mm Treated Timber 4×2 at a competitive price, without compromising on quality. With our commitment to quality and affordability, you can be sure that you’re getting the best value for your money.

Standard Sizes:







Standard Lengths:

1.2 meter (4ft)

2.4 meter (8ft)

3 meter (10ft)

3.6 meter (12ft)

4.2 meter (14ft)

4.8 meter (16ft)

*Actual product dimensions may differ ever so slightly from those listed due to the treating process. All lengths are C24 grade, but can vary. Please note, timber C16 grade has more knots than grade C24.

Additional information

Weight N/A
Dimensions N/A

1.2 meter (4ft), 2.4 meter (8ft), 3 meter (10ft), 3.6 meter (12ft), 4.2 meter (14ft), 4.8 meter (16ft)

Timber Grade


Timber Size


Timber Type

Treated Timber

Treated timber offers a number of benefits, including:

Durability: Treated timber is incredibly durable and can withstand even the harshest weather conditions. It is also resistant to rot, decay, and insect damage.

Long lifespan: Treated timber can last for many years, typically 15-20 years or more. This is much longer than traditional untreated wood, which typically needs to be replaced every 5-10 years.

Low maintenance: Treated timber requires very little maintenance. It does not need to be painted or stained, and it can be easily cleaned with soap and water.

Versatility: Treated timber can be used in a variety of applications, including outdoor decking, fencing, landscaping, and more

No, you should never burn treated wood because it will release toxic chemicals into the air and produces toxic ash.

Yes, they’re 2 different names for the same process of adding chemicals to the wood to make it longer lasting and immune to insects, rot and fungus.

Any wood after time will turn grey, dry out and crack if left exposed to the elements. To protect the wood from cracking or turning grey you could apply a clear water repellent sealer, satin or paint.

Treated timber can be used in moist conditions outside because of the way it’s treated. It will repel any insects that want to destroy the timber.

Yes, you should always wear safety equipment when cutting treated timber such as goggles and dust masks. Never cut indoors always cut treated timber outside, also don’t burn treated wood.

The stuff used to treat the timber contains a mixture of salts of copper sulphate, potassium dichromate and arsenic pentoxide. Children have a higher chance of getting arsenic poisoning if they do not wash their hands before eating.

Treated timber will need extra protection from water and moisture like a waterproof coat but remember to top it up every 12 months.

Yes, treated timber is treated with copper, chromium and arsenic which protect the wood from fungi, termites and other insects.

Treated timber could last up to 15 years or sometimes longer if properly looked after. Non-treated wood will last up to 5 years but if exposed to weather it will last less time.