Custom Garden Trellis in Burwell - Materials and Options Explained

The material decision comes first

The most important choice you will make with garden trellis is not the pattern or the colour. It is the timber. Get that right and everything else follows. Get it wrong and you will be looking at replacement work within a few years, regardless of how well the panels are built.

Haverhill Fencers builds custom trellis panels to order. We want customers in Burwell to understand what they are choosing and why, so here is an honest breakdown of the main options.

Treated softwood

The most widely used material for outdoor trellis is pressure-treated softwood, typically Scots pine or spruce that has been kiln-dried and then vacuum-impregnated with preservative under pressure. This is not the same as dip-treated or brush-treated timber: the preservative penetrates deep into the wood rather than sitting on the surface.

Pros: Cost-effective, widely available, takes paint and stain well, and when properly treated will last 15 to 20 years in a typical garden setting without structural failure. Lightweight enough to be handled easily during installation.

Cons: Softwood is not as dimensionally stable as hardwood. It will move with moisture change, particularly in the first couple of years after fitting. Joints can open slightly. End-grain cuts on site should be treated with a brush-on preservative before the panel goes up. It is also worth knowing that the green tint from the copper-based preservative fades to a grey-brown over time, which some people like and others prefer to paint over.

For most domestic garden trellis jobs in Burwell, treated softwood at 38 x 38 mm or 44 x 44 mm section is the sensible starting point. Typical cost for a custom softwood trellis panel is broadly in the range of £80 to £180 per panel depending on size and complexity, including fitting.

Hardwood

European oak is the most common hardwood choice for garden joinery. It is dense, naturally durable, and ages to an attractive silver-grey if left unfinished. Iroko is another option: slightly more stable than oak and with a warm brown tone that takes oil finishes well.

Pros: Substantially longer service life than softwood in exposed conditions. More resistant to splitting and warping. A hardwood trellis looks noticeably heavier and more considered than a softwood equivalent. If the trellis is a visible feature of the garden design rather than just a functional screen, the quality of the timber shows.

Cons: The cost is higher. Oak trellis in custom sizes will typically run 60 to 80 per cent more than an equivalent softwood panel. It is also heavier, which matters if the trellis is going onto a wall rather than a post, since the fixings and the wall substrate need to carry that weight reliably. Hardwood also moves: oak in particular will check (surface crack) as it dries, which is normal and not structural but surprises some customers.

Composite and metal options

Composite timber products (wood fibre and plastic combined) are increasingly available for fence boards but are far less common for trellis work. The main reason is that trellis requires narrow section battens with precise joints, and current composite profiles do not replicate that as neatly as they do for solid fence boards. For most residential garden trellis, composite is not the practical choice.

Powder-coated steel or aluminium trellis exists and suits a specific look, particularly in contemporary gardens with render walls and clean lines. It does not rot, does not need painting, and supports heavy climbers well. The downside is that it is cold to the eye in a traditional garden setting, it can corrode at cut or damaged edges if the coating is broken, and it is considerably more expensive than timber. If you are considering a metal trellis for an accent wall or a specific focal point, it is worth factoring in the full install cost before committing.

Pattern and spacing choices

Garden trellis comes in two main geometric patterns: square lattice (battens at 90 degrees) and diamond lattice (battens at 45 degrees). The choice is largely visual, but there are practical differences.

• Square lattice is easier to tie in plants horizontally and vertically. It suits formal designs and works well as a topper above a close-board fence panel.
• Diamond lattice gives a more traditional cottage-garden feel. Climbing plants tend to find it easier to grip in the early stages because there are more angles for tendrils to catch.
• Batten spacing typically runs from 100 mm to 150 mm between centres. Wider spacing looks lighter and suits plants with larger leaves. Closer spacing offers more privacy from the outset but catches more wind.

On a custom order, you specify the spacing. We cut and assemble to those dimensions rather than asking you to make do with a standard pattern.

Finishes: treated, painted, or stained

Pressure-treated softwood can be left as-is, painted, or stained. Left untreated on the surface it weathers to grey, which blends well with many garden styles. Painted trellis (typically in a fence or shed paint such as a dark grey, sage, or slate blue) gives a sharper, more designed look and the colour helps the foliage in front of it stand out.

A spirit-based wood stain soaks into the surface rather than sitting on top, so it does not peel in the way that some paints do. It does need reapplying every three to five years. Painted finishes last well if applied to dry timber and maintained, but any damaged area should be touched up promptly to prevent moisture getting into the wood beneath.

We can supply panels pre-finished in a single base colour, or we can leave them ready for you to paint in whatever matches your existing garden scheme.

Sizes and what custom actually means

Off-the-shelf trellis is sold in fixed increments. If your fence run is 4.3 metres wide, you will either have a gap or an overlap. Custom means we build the panels to your actual measurements, so the finished job looks intentional rather than improvised.

Custom trellis also means you can specify the height of a topper panel to suit your fence post, include a shaped top (arched or stepped) if that suits the garden, or have a corner section mitred so two runs meet neatly at a 90-degree boundary. None of this is complicated joinery, but it does require the work to be measured and built to your specific site rather than pulled from a pallet.

Talk to us about the options for your Burwell garden

If you are weighing up materials or patterns and want a straight answer on what will work best in your garden, call Haverhill Fencers. We will visit the site, measure up, and give you a clear price for the options that make sense for your boundary or wall.