Why cedar cladding works so well for garden buildings

Western Red Cedar has long been the go-to cladding for garden rooms, shepherd huts and cottage outbuildings. It is naturally durable, resists rot and insect attack, and holds its shape through wet winters and dry summers. Left untreated, it weathers to a soft silver-grey that sits beautifully in a British garden. But not all cedar boards are the same. The grade you choose — clear, knotty or finger jointed — affects how your building looks, how it performs in exposed spots, and how much you spend. Getting this right at the outset saves money and frustration later.

Clear grade: the premium choice for crisp, contemporary looks

Clear grade cedar is free from knots and has a straight, uniform grain. It is the cleanest, most consistent option, which makes it ideal for contemporary garden rooms where you want sharp lines and an even finish. Because there are no knots to shrink or crack, clear boards are also the most stable and reliable in exposed positions — coastal gardens, windy hillsides or anywhere driving rain hits the wall.

Clear grade takes stains and paints beautifully, soaking up colour evenly. It is the most expensive grade, but you waste less on defects and you can leave it natural with confidence. If your budget allows, clear cedar is the best long-term investment for a garden building that needs to look good from every angle. Fix it with stainless steel nails or screws to avoid rust stains.

Knotty grade: character and value for shepherd huts and cottages

Knotty grade cedar includes knots of varying sizes, giving a more rustic, organic appearance. This suits shepherd huts, cottages and traditional outbuildings where a bit of character is part of the charm. It is significantly cheaper than clear grade, so you can clad a larger area for the same money.

The trade-off is that knots can shrink and crack over time, and they may absorb stain differently from the surrounding wood. In sheltered spots — a courtyard, a south-facing wall under an overhang — knotty cedar performs well and ages gracefully. In very exposed locations, expect to check and maintain it more often. If you plan to paint, knots may need a knotting solution to stop resin bleed, though cedar knots are usually tight and less troublesome than some softwoods.

Finger jointed boards: budget-friendly and stable for painted finishes

Finger jointed cedar is made from shorter clear lengths joined end-to-end with interlocking fingers and waterproof glue. The result is a long, stable board that resists warping and twisting — often better than a single piece of lower-grade timber. It is the most affordable way to get a clear, knot-free look.

The catch is the joints. If you leave finger jointed cladding to weather naturally, the glue lines and finger profiles can show as faint stripes. That makes it less suited to a natural silver-grey finish. But if you plan to paint your garden room or shepherd hut, finger jointed boards are an excellent choice. The paint hides the joints, the boards stay flat, and you save money for other details like windows, doors or a veranda. Always prime and paint all faces, especially the cut ends, to keep moisture out.

Matching grade to exposure and finish

Think about where your building sits and how you want it to age. A few practical guidelines:

• Exposed sites (coastal, upland, no shelter): choose clear grade. It has the fewest weak points and will outlast other grades with less maintenance.
• Sheltered sites (walled garden, courtyard, under trees): knotty grade is fine and gives lovely rustic texture.
• Natural weathering (no paint, just silver-grey): clear or knotty. Avoid finger jointed unless you accept visible joints.
• Stained finish: clear grade gives the most even colour. Knotty will show variation.
• Painted finish: finger jointed is the budget hero. It is stable and smooth, and paint covers the joints.

Whatever grade you pick, fit cladding over a ventilated rain screen — battens with a breathable membrane — and leave a gap at the bottom and top. This lets the cedar dry after rain and prevents moisture trapping. Use stainless steel fixings, and don't seal the boards tightly together; allow for slight movement.

Making your choice: budget, style, and longevity

For most garden rooms, shepherd huts and cottage outdoor living spaces, the decision comes down to three things. Budget: finger jointed is cheapest, then knotty, then clear. Style: contemporary and minimal calls for clear; rustic and traditional suits knotty; painted joinery suits finger jointed. Longevity: all cedar will give decades of service if detailed correctly, but clear grade will hold its appearance longest with the least fuss.

Order around 10% more than you need for cuts and mistakes. Store boards flat and dry before installation. And if you are unsure, ask for a sample of each grade — once you see them side by side in daylight, the right choice for your building becomes obvious. Cedar is a forgiving, beautiful material. Match the grade to your site and your ambitions, and your garden building will look settled and loved for years to come.