The Biggest Sawmills in the UK

The UK timber industry depends on large sawmills, timber processors and wood-based panel manufacturers to turn harvested timber into usable materials for construction, fencing, landscaping, pallets, packaging, furniture and joinery. Without these processing sites, timber from forests would not become the fence panels, posts, rails, boards, sleepers, battens and structural timber used across the country.

When people ask about the biggest sawmills in the UK, the answer is not always simple. Some companies operate multiple sawmills rather than one single enormous site. Others process timber into wood-based panels instead of producing sawn fencing or construction timber. Capacity, output, employment, site size and product range can all produce different rankings.

This guide looks at some of the major names in UK sawmilling and timber processing, including BSW Timber, James Jones & Sons, Glennon Brothers, EGGER and Kronospan. It also explains why sawmills matter for garden fencing, how timber processing affects quality, and why sustainable sourcing is important.

What does a sawmill do?

A sawmill processes logs into usable timber. Logs are delivered from forests, graded, debarked, sawn, dried, treated, planed or further processed depending on the product required.

Sawmills can produce timber for:

• Fence panels
• Fence posts
• Feather edge boards
• Rails and battens
• Timber cladding
• Construction carcassing
• Decking
• Pallet wood
• Packaging timber
• Landscaping timber
• Sleepers
• Joinery timber

Some sites focus on sawn timber. Others feed material into panel products, engineered wood, biomass, chips, bark, sawdust and other by-products.

Why sawmills matter for garden fencing

Garden fencing depends heavily on processed softwood. Fence panels, wooden fence posts, closeboard fencing, lap panels, trellis panels, rails, gravel boards and garden gates all begin as timber that has been harvested, sorted and converted.

The quality of sawmilling affects:

• Board consistency
• Panel strength
• Post dimensions
• Timber grading
• Drying quality
• Treatment performance
• Waste levels
• Supply reliability
• Availability of fencing materials

A reliable timber supply chain helps keep fencing products available for builders’ merchants, fencing suppliers, landscapers and homeowners.

BSW Timber

BSW Timber is one of the most important names in UK sawmilling and is widely described as the UK’s largest sawmilling company. The business produces sawn timber products for sectors including construction, fencing, landscaping, pallet production, packaging and DIY.

BSW operates multiple manufacturing sites and is part of a wider forestry and timber group. Its scale means it plays a significant role in the UK timber supply chain, especially where large volumes of certified softwood products are required.

BSW Timber products are commonly associated with:

• Construction timber
• Fencing timber
• Landscaping timber
• Decking
• Cladding
• Pallet and packaging timber
• Certified timber products

For the fencing industry, large sawmillers such as BSW help supply the raw material used for panels, posts, rails and outdoor timber products.

BSW Timber Fort William

BSW Timber’s Fort William sawmill is one of the best-known sawmilling sites in the UK. Located in Scotland, it has long been associated with large-scale timber processing and local employment.

Fort William is important because Scotland is a major source of UK-grown softwood. Sawmills located close to forestry resources can reduce unnecessary transport and support local timber processing.

The Fort William site is often mentioned when discussing major UK sawmills because of its history, scale and role in processing home-grown timber.

James Jones & Sons

James Jones & Sons is one of the UK’s largest timber processing companies and a major name in British-grown timber. The company has a long history and operates sawmills across Scotland and the north of England, alongside pallet, packaging and engineered timber operations.

The business is associated with a wide range of timber products, including:

• Sawn timber
• Fencing timber
• Carcassing timber
• Pallet wood
• Packaging timber
• Engineered wood products
• Heavy sections

James Jones & Sons is especially relevant to the fencing market because fencing timber is one of the important uses for British-grown softwood.

James Jones & Sons Larbert

Larbert in Scotland is closely associated with James Jones & Sons and its wider timber processing operations. The company’s registered office is in Larbert, and the business has a significant Scottish sawmilling presence.

When discussing the largest sawmilling businesses in the UK, James Jones & Sons is usually considered one of the key companies rather than a single-site operator only. Its importance comes from its network, product range and scale across timber harvesting, sawmilling, engineered timber, pallets and packaging.

Glennon Brothers

Glennon Brothers is another major timber processor serving the UK and Irish markets. The company has a long history in timber manufacturing and operates sites including Troon and Windymains in Scotland.

Glennon Brothers supplies timber products for sectors such as construction, fencing, pallet wood and packaging. Its UK operations make it a significant name in the sawmilling sector and a relevant company when discussing the largest sawmillers supplying the UK market.

Products associated with Glennon Brothers include:

• Kiln dried construction timber
• Fencing timber
• Pallet timber
• Packaging timber
• Machined whitewood products
• Treated timber products

For fencing and landscaping, companies such as Glennon Brothers help supply the timber used in outdoor products, treated materials and structural garden timber.

Glennon Brothers Troon

Troon in Scotland is one of the important Glennon Brothers locations. The site is associated with sawmilling and timber processing for the UK market.

Troon’s location supports timber processing in Scotland, where much of the UK’s commercial softwood resource is grown. Large Scottish sawmills are therefore central to the supply of home-grown timber across the UK.

Windymains Timber

Windymains Timber, part of the Glennon Brothers group, is a specialist fencing and treated timber operation near Edinburgh. It is particularly relevant to fencing because it focuses on treated timber and fencing products.

Specialist fencing mills and treatment sites matter because fencing timber faces demanding outdoor conditions. Fence posts, rails, gravel boards and panels all need suitable processing and treatment if they are to perform well outside.

EGGER UK

EGGER is best described as a major wood-based panel manufacturer rather than a traditional sawmiller producing fence panels and posts. In the UK, EGGER operates chipboard production sites at Hexham in Northumberland and Barony in East Ayrshire.

EGGER uses wood resources such as round wood, recycled wood and sawmill by-products to manufacture panel products for furniture, interiors, building and flooring applications.

EGGER products are associated with:

• Chipboard
• Structural flooring
• Interior boards
• Furniture boards
• Wood-based building products
• Decorative surfaces

Although EGGER is not a fencing sawmill in the same way as a softwood sawmiller, it is still an important part of the UK wood processing industry.

EGGER Hexham

EGGER’s Hexham site in Northumberland is one of the major wood processing and manufacturing sites in the UK. It produces wood-based boards used in construction, flooring, furniture and interior applications.

Sites like Hexham are important because they use a wider range of wood fibre, including residues and recycled material. This helps keep wood in use and supports the efficient use of timber resources.

Kronospan Chirk

Kronospan’s Chirk site in Wrexham is another major UK wood-based panel manufacturing location. Kronospan manufactures and distributes wood-based panels and uses timber residues and recycled wood as part of the wood supply chain.

Kronospan is associated with:

• Wood-based panels
• Particleboard
• MDF and related board products
• Decorative panels
• Building boards
• Furniture and interior board materials

Like EGGER, Kronospan should not be confused with a straightforward fencing sawmill. It is a major wood processor and panel manufacturer, which is a different part of the timber industry.

Sawmills versus wood-based panel manufacturers

It is useful to separate sawmills from wood-based panel manufacturers.

Sawmills typically convert logs into sawn timber products such as:

• Boards
• Posts
• Rails
• Carcassing timber
• Fencing timber
• Decking timber
• Pallet timber

Wood-based panel manufacturers usually turn wood fibre, chips, residues or recycled wood into products such as:

• Chipboard
• MDF
• OSB
• Particleboard
• Furniture panels
• Flooring boards
• Decorative panels

Both are important, but they serve different markets and should not always be ranked together.

Why Scotland has so many major sawmills

Many of the UK’s major sawmilling operations are in Scotland because Scotland has a large commercial forestry resource. Locating sawmills close to forests makes practical sense.

Benefits of processing timber close to the forest include:

• Reduced log transport distances
• Better access to softwood supply
• Support for rural employment
• Stronger local timber economies
• More efficient timber processing

This is why companies such as BSW Timber, James Jones & Sons and Glennon Brothers have major Scottish operations.

What timber species do UK sawmills process?

UK sawmills process a range of softwood species, with Sitka spruce being one of the most important commercial species in British forestry. Other softwoods may include pine, larch, Douglas fir and other species depending on supply and intended use.

Softwood is widely used because it grows relatively quickly and is suitable for many construction, fencing, landscaping and packaging uses when processed correctly.

For garden fencing, softwood is common because it can be sawn, treated and manufactured into affordable outdoor products.

How sawmills turn logs into fencing timber

Fencing timber goes through several stages before it becomes a finished fence panel, post or rail.

The process may include:

• Harvesting trees
• Transporting logs to the sawmill
• Sorting and grading logs
• Debarking
• Sawing into boards or sections
• Drying or kiln drying
• Grading
• Machining where required
• Pressure treatment
• Manufacturing into panels or components
• Distribution to suppliers

Each stage affects the final product. Poor drying, inaccurate sawing or unsuitable treatment can reduce timber performance.

Why kiln drying matters

Kiln drying reduces the moisture content of timber in controlled conditions. This makes the timber more stable, easier to grade and more suitable for treatment or further processing.

Kiln drying can help with:

• Improved dimensional stability
• Better treatment uptake in some processes
• Reduced weight for transport
• Improved strength grading consistency
• Reduced risk of fungal issues during storage

Not every fencing product needs the same drying process, but moisture management is an important part of timber quality.

Why pressure treatment matters for fencing

Fencing timber is exposed to rain, damp soil, frost and changing temperatures. Pressure treatment helps protect timber against decay and insect attack.

Pressure treatment is especially important for:

• Fence posts
• Gate posts
• Gravel boards
• Feather edge boards
• Fence rails
• Timber battens
• Trellis panels
• Garden sleepers

Large sawmills and timber processors often work closely with treatment plants and downstream manufacturers to supply timber suitable for outdoor use.

What happens to sawmill by-products?

Modern sawmills aim to use as much of the log as possible. The main product may be sawn timber, but by-products are also valuable.

Sawmill by-products can include:

• Wood chips
• Sawdust
• Bark
• Wood shavings
• Offcuts
• Biomass fuel
• Raw material for panel manufacturing
• Animal bedding material

Efficient use of by-products helps reduce waste and supports the wider wood processing industry.

Why sustainable sourcing matters

Sustainable forestry is important because timber demand must be balanced with responsible forest management. Well-managed forests can provide timber while supporting biodiversity, carbon storage, recreation, employment and future planting.

Responsible timber sourcing may involve:

• Forest certification
• Legal harvesting
• Replanting
• Chain of custody controls
• Efficient processing
• Using by-products
• Reducing waste
• Improving transport efficiency

For homeowners buying fencing, sustainable sourcing is one reason to choose reputable suppliers and properly treated timber products.

Certified timber and chain of custody

Certification schemes help show that timber has come from managed sources and has been tracked through the supply chain. For sawmills, chain of custody systems help connect the forest source to the finished product.

Certified timber is important in sectors such as construction, fencing, landscaping, joinery and public procurement. It gives buyers more confidence about the origin of the material.

Home-grown timber in the UK

Home-grown timber plays an important role in the UK supply chain. It supports forestry jobs, sawmilling, transport, manufacturing and merchant supply. It also reduces reliance on imported timber for some products.

Home-grown softwood is commonly used for:

• Fencing
• Landscaping
• Pallets
• Packaging
• Construction timber
• Garden timber products

For garden fencing, UK-grown timber can be a practical and reliable material when it is processed, treated and installed correctly.

Imported timber and UK supply

The UK also imports large volumes of timber and timber products. Imports help meet demand, especially where the UK does not grow enough of certain grades, sizes or species.

A healthy timber supply chain may include both home-grown and imported timber. The key considerations are legality, quality, certification, suitability and availability.

How large sawmills affect timber availability

Large sawmills help create a consistent supply of standard timber sizes and products. This matters for industries that need reliable volume, such as construction, fencing, pallet manufacturing and landscaping.

Large-scale sawmilling can support:

• Consistent product dimensions
• Reliable grading
• Bulk supply
• Lower processing waste
• Better use of by-products
• More efficient logistics
• Stable merchant supply

For fencing suppliers, dependable timber processing helps keep fence panels, posts and rails available throughout the year.

How timber processing affects fence panel quality

The quality of a fence panel depends on more than its final assembly. It starts with the timber.

Important factors include:

• Timber species
• Sawing accuracy
• Board thickness
• Moisture content
• Knots and natural defects
• Treatment quality
• Fixing quality
• Panel design
• Storage before delivery

A well-made panel should use timber that is suitable for outdoor exposure and appropriate for the panel style.

How timber processing affects fence posts

Fence posts carry the load of the fence, so timber quality and treatment are especially important. Posts are at greatest risk where they enter the ground, because that area is exposed to moisture and decay risk.

Good fence posts should be:

• Correctly sized for the fence height
• Treated for the intended exposure
• Suitable for ground contact where required
• Straight enough for installation
• Free from major structural defects
• Installed with good drainage in mind

Even good timber posts can fail early if installed badly in wet ground.

The role of treatment plants

Not every sawmill produces finished fencing products on site. Timber may be sawn at one site, treated at another and manufactured into panels elsewhere.

Treatment plants apply preservatives to help protect outdoor timber. For fencing, pressure treatment is commonly used because it gives better protection than simple surface treatment.

Treatment is important for:

• Fence posts
• Feather edge boards
• Rails
• Gravel boards
• Garden sleepers
• Trellis panels
• Fencing components

Why sawmill investment matters

Modern sawmills use advanced scanning, cutting, grading and handling technology. Investment in machinery helps improve yield, consistency and safety.

Investment can improve:

• Log scanning
• Cutting accuracy
• Timber grading
• Drying efficiency
• Waste reduction
• Energy use
• Automation
• Worker safety
• Product consistency

For the customer, this can mean more consistent timber products and a more reliable supply chain.

Sawmills and local economies

Large sawmills support employment beyond the mill itself. Forestry, harvesting, haulage, machinery servicing, treatment plants, merchants and manufacturers all depend on timber processing.

Sawmills contribute to:

• Rural employment
• Transport jobs
• Forestry management
• Manufacturing
• Construction supply
• Fencing and landscaping supply
• Export and domestic trade

This makes sawmills an important part of local and national economic infrastructure.

Sawmills and carbon

Timber is often valued because trees absorb carbon as they grow, and wood products can store carbon for the life of the product. Processing timber efficiently can help make the best use of this resource.

However, sustainability depends on responsible forestry, efficient processing, transport, product lifespan and end-of-life handling. Timber is not automatically sustainable just because it is timber. It must be legally and responsibly sourced.

Why by-products support panel manufacturers

Panel manufacturers such as EGGER and Kronospan use wood fibre, residues and recycled wood to make board products. This creates a link between sawmilling and panel manufacturing.

Useful by-products can include:

• Wood chips
• Sawdust
• Shavings
• Recycled wood
• Small roundwood

Using these materials helps reduce waste and creates value from parts of the tree that may not become sawn boards.

Are the biggest sawmills always the best?

Not necessarily. Large sawmills are important for volume, consistency and supply, but smaller sawmills can also produce excellent timber. Some smaller mills specialise in local hardwoods, bespoke cuts, traditional joinery timber, unusual dimensions or specialist products.

The best sawmill depends on the product needed. A large softwood sawmill may be ideal for fencing and construction volume. A smaller specialist mill may be better for oak beams, custom boards or heritage work.

How this affects homeowners buying fencing

Most homeowners will never buy directly from a major sawmill, but sawmills still affect what appears in fencing yards, builders’ merchants and garden suppliers.

When buying fencing, focus on:

• Correct panel size
• Timber treatment
• Post strength
• Gravel board compatibility
• Panel style
• Suitability for wind exposure
• Delivery and handling
• Overall fence system, not just panel price

The sawmill is the start of the chain, but product quality also depends on treatment, manufacturing, storage, delivery and installation.

What to look for in fencing timber

When choosing timber fencing products, look for materials that suit outdoor use and the job they need to do.

Useful checks include:

• Is the timber pressure treated?
• Are posts suitable for ground contact?
• Are panels strong enough for the site?
• Are gravel boards needed?
• Are cut ends treated after trimming?
• Are fixings suitable for outdoor use?
• Is the panel style suitable for wind exposure?
• Is the timber stored properly before installation?

Good fencing is a complete system. A strong panel fitted to weak posts will still fail.

Common misconceptions about sawmills

The timber industry can be confusing because different companies use different terms. Avoid these common assumptions:

• The biggest timber company is not always the biggest single sawmill
• A panel manufacturer is not always a sawmill
• A wood-based panel plant is different from a fencing timber mill
• Certified timber still needs correct installation
• Pressure treated timber is not maintenance-free
• UK-grown timber and imported timber can both have legitimate roles
• Sawmill by-products are valuable, not just waste

Understanding these differences makes it easier to judge timber supply claims.

The major UK sawmilling names to know

If you are researching large UK sawmillers, the names most often discussed include:

• BSW Timber
• James Jones & Sons
• Glennon Brothers

If you are researching large UK wood-based panel manufacturers, important names include:

• EGGER
• Kronospan

These companies operate in connected but different parts of the timber and wood processing industry.

Frequently asked questions

What is the biggest sawmill in the UK?

There is no single simple answer because rankings can be based on site size, output, company turnover, number of sawmills or product range. BSW Timber is widely described as the UK’s largest sawmilling company.

Who are the biggest sawmillers in the UK?

The major names commonly associated with large-scale UK sawmilling include BSW Timber, James Jones & Sons and Glennon Brothers.

Is EGGER a sawmill?

EGGER is better described as a wood-based panel manufacturer. Its UK sites produce products such as chipboard and building boards rather than being conventional fencing sawmills.

Is Kronospan a sawmill?

Kronospan is a major wood-based panel manufacturer. Its Chirk operation is important in the wood processing industry, but it is not the same as a traditional sawmill producing sawn fencing timber.

Why are many large UK sawmills in Scotland?

Scotland has a large commercial forestry resource, especially softwood. Locating sawmills near forests helps reduce transport distances and supports local timber processing.

Do sawmills make fence panels?

Some sawmills and timber processors supply the timber used to make fence panels, while finished panels may be assembled by specialist fencing manufacturers or downstream suppliers.

What timber is used for fence panels?

Most UK garden fence panels are made from softwood. Pressure treated softwood is commonly used because it is suitable for outdoor fencing when processed and installed correctly.

What happens to sawdust from sawmills?

Sawdust and other by-products can be used for panel manufacturing, biomass, animal bedding, wood pellets or other industrial uses depending on the supply chain.

Is UK-grown timber good for fencing?

UK-grown softwood can be suitable for fencing when it is correctly sawn, dried, treated and manufactured into appropriate products.

Does sustainable timber mean the fence will last longer?

No. Sustainability relates to sourcing and forest management. Fence lifespan depends on timber quality, treatment, installation, exposure, maintenance and post strength.

Final thoughts

The biggest names in UK sawmilling include BSW Timber, James Jones & Sons and Glennon Brothers. These companies help supply the sawn timber used across construction, fencing, landscaping, pallets and packaging. EGGER and Kronospan are also major wood processors, but they are better understood as wood-based panel manufacturers rather than traditional sawmillers.

For homeowners, the main lesson is that fencing quality starts long before a panel reaches the garden. Logs must be harvested, sawn, dried, treated, manufactured, stored and installed properly. A strong fence depends on the whole supply chain.

When buying garden fencing, focus on suitable treated timber, strong posts, appropriate gravel boards, reliable fixings and correct installation. Large sawmills help provide the material, but the finished fence still needs the right products and proper fitting to perform well in a real garden.