Best Treated Construction Lumber of 2025

Corey Phillips Avatar
Corey Phillips
Last Updated: 1 Feb 2025

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Treated construction lumber is a popular choice for outdoor building projects, such as decks, fences, and retaining walls. This type of lumber has been treated with chemicals to resist rot, decay, and insect damage, making it durable and long-lasting. Treated construction lumber is available in a range of sizes and grades to suit different building needs. It is important to follow proper handling and disposal procedures for treated lumber, as the chemicals used in the treatment process can be harmful to humans and the environment.

At a Glance: Our Top Picks

Treated Timber 6x2 for Construction Projects Cover #TOP 1
Treated Timber 6x2 for Construction Projects
ftb score rating icon 9.8
Treated Timber Battens 25mm x 50mm Green Cover #TOP 2
Treated Timber Battens 25mm x 50mm Green
ftb score rating icon 9.7
Pressure Treated Softwood Timber 6"x1" Pack of 12 Cover #TOP 3
Pressure Treated Softwood Timber 6"x1" Pack of 12
ftb score rating icon 9.5

Top 7 Treated Construction Lumber

#TOP 1

Treated Timber 6x2 for Construction Projects

12ft (3.6m)
Treated Timber 6x2 for Construction Projects Cover
Treated Timber 6x2 (150mm x 47mm) | 12ft (3.6m)

The Builders Marketplace Treated Timber is a high-quality option for your construction and DIY needs. With precise dimensions of 150mm in width and 47mm in height, it is perfect for various applications, whether indoors or outdoors. Its durable material ensures long-lasting use, allowing you to complete your projects with confidence. The easy-to-handle rectangular shape simplifies cutting and manoeuvring, making it convenient for users to adapt the timber to their specific requirements.

What We Like
High-quality durable wood
Versatile for indoor and outdoor use
Easy to handle and cut
Precise dimensions for accuracy
#TOP 2

Treated Timber Battens 25mm x 50mm Green

Green
Treated Timber Battens 25mm x 50mm Green Cover
Treated Timber Battens 25mm x 50mm (2x1 inch) 1.8 Metre,Green - Rough Sawn Treated Timber, Timber battens 2x1 Inch, Treated Timber Battens 25x50mm 2x1 Inch (10)

The Treated Timber Battens are made from kiln-dried Scandinavian Redwood, ensuring extra strength and durability. This 2x1 inch timber has been pressure-treated to resist rot and decay, making it ideal for both indoor and outdoor applications. You can use it for various projects, such as fencing, landscaping, and framing, offering versatility for your construction needs. With minimal maintenance required, you can easily paint or stain the battens to enhance their appearance and longevity.

What We Like
Durable and long-lasting
Versatile for many projects
Pressure-treated for rot resistance
Minimal maintenance required
Made from quality Scandinavian Redwood
#TOP 3

Pressure Treated Softwood Timber 6"x1" Pack of 12

Pack of 12
Pressure Treated Softwood Timber 6"x1" Pack of 12 Cover
Pressure Treated Softwood Timber 6" x 1" (150mm x 22mm) - 1.8 Metres (Pack of 12)

The Atlantic Timber Softwood Pack features versatile 6"x1" rough sawn timber, perfect for various outdoor projects. Sourced from northern Sweden, this timber is slow grown, ensuring enhanced strength and stability. With strength grades of C16 or C24, you can trust its durability for garden tasks like path edging or shed building. The timber is also pressure treated with Tanalith E, providing excellent protection against the elements. Remember to seal the cut ends for continued longevity.

What We Like
Versatile for various projects
Strong and stable timber
Pressure treated for durability
Ideal for outdoor use
Easy to work with
#TOP 4

Pressure Treated Softwood Timber for Outdoor Use

Pressure Treated Softwood Timber for Outdoor Use Cover
Pressure Treated Softwood Timber 6" x 1" (150mm x 22mm) - 1.8 Metres, Sawn Treated Wood Timber Post Wooden 150x22mm 6x1" (20)

The Softwood Timber Post measures 150mm in width and 22mm in thickness, making it ideal for various outdoor projects. This green pressure treated timber is perfect for fencing and other external applications. You can easily use it for garden tasks such as path edging or shed construction. Since the timber is imported from northern Sweden, its slow growth ensures enhanced strength and stability, providing you with reliable materials for your joinery and woodworking projects.

What We Like
Durable and pressure treated
Versatile for outdoor projects
Strong and stable material
Suitable for various woodworking tasks
#TOP 5

Pressure Treated 2x2 Inch Timber 1.2 Metre

Green
Pressure Treated 2x2 Inch Timber 1.2 Metre Cover
Pressure Treated Timber 2 x 2 Inch (50mm) Timber 1.2 Metre,Green - Planed Treated Timber, Timber battens 2x2 Inch, Treated Timber 50x50mm 2x2 Inch (20)

The Pressure Treated Timber is an excellent choice for various construction and craft projects. This 2x2 timber has been specially treated to enhance its durability, making it resistant to rot and decay. You can use it for both indoor and outdoor applications, such as framing, fencing, and landscaping. Its minimal maintenance requirement means you can paint or stain it as desired, ensuring it remains attractive over time. This versatility allows you to utilise it for decorative projects or general construction tasks with ease.

What We Like
Durable and long-lasting
Resistant to rot and decay
Suitable for indoor and outdoor
Minimal maintenance required
#TOP 6

4 X 2 C16 Sawn Treated Timber Pack

4 X 2 C16 Sawn Treated Timber Pack Cover
4 X 2 Timber (47 X 100MM) C16 Sawn Treated Timber 4.8MTR - Pack of 16

The Buildershop UK Timber is a high-quality construction lumber option, featuring kiln-dried C16 graded wood that ensures durability and strength for your projects. With its sawn and treated design, you can trust that this timber is well-prepared for outdoor use, providing resistance against weather elements. Measuring an impressive 4.8 metres in length, it offers flexibility for a variety of applications, whether you're building structures or completing renovations. The pack of 16 pieces means you will have ample supply for larger projects, making it a convenient choice for builders and DIY enthusiasts alike.

What We Like
Durable C16 graded wood
Weather-resistant treatment
Long 4.8 metre lengths
Pack of 16 for convenience

Ruby C24 Graded Timber Treated 4x2

Ruby
3.6m
Ruby C24 Graded Timber Treated 4x2 Cover
Ruby C24 Graded Timber Treated 4x2 Quality Construction Grade Kiln Dried (5, 3.6m)

The Ruby C24 Timber is a high-quality construction-grade lumber that has been treated and kiln-dried for durability. Its finished size of 95mm x 45mm makes it versatile for various building applications. The C24/C16 grade ensures it meets structural specifications, providing reassurance for your projects. Additionally, the regularised timber features eased edges, making it easy to handle while reducing size variation. This means you can work more efficiently and enjoy a smoother building process.

What We Like
Durable and rot-resistant
Easy to handle
Consistent sizing
Suitable for structural applications
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What's the difference between #1 and #2 pressure treated lumber?

The main difference between #1 and #2 is the slope of the wood grain, size, spacing, and the number of knots and holes, and the length of any splits. Construction grade is #1 and Standard is #2. Both can be used for load-bearing purposes or other outdoor applications.

2. What are the different types of treated lumber?

There are two types of treated wood: preservative-treated wood and pressure-preservative-treated wood (pressure treated lumber).

3. What is treated lumber?

Pressure-treated lumber is the result of a process that uses high pressure to inject a preservative into the wood. It's a process that extends the longevity of the wood considerably, adding decades to the life of the material.

4. What is the best grade of pressure treated lumber?

The 5 Pressure Treated Lumber Grades Select structural, or SS, is the highest grade based on durability and strength. Standard grade lumber can be used for joists and other load-bearing applications.

Editor's Notes

During our treated construction lumber research, we found 9 treated construction lumber products and shortlisted 7 quality products. We collected and analyzed 3,254 customer reviews through our big data system to write the treated construction lumber list. We found that most customers choose treated construction lumber with an average price of £116.24.

The treated construction lumber are available for purchase. We have researched hundreds of brands and picked the top brands of treated construction lumber, including Builders Marketplace, Atlantic Timber, Buildershop UK, Ruby. The seller of top 1 product has received honest feedback from 73 consumers with an average rating of 4.2.

Written by
Corey Phillips Avatar

Corey Philips is an electrician and lighting expert. He graduated from the University of Birmingham in 2012 with a Bachelor's degree in electrical and electronics engineering. Corey is a specialist contractor in lights. He sells and installs and recommends lights and lamp sheds, and other lights accessories. Aside from that, Corey is vast in installing and maintaining electrical appliances like air conditioners, water heaters, and the likes.