How to Install a Wooden Fence Panel in the Garden: A Guide to Durable Installation
Installing a wooden fence panel in the garden blocks out prying eyes, cuts the wind and structures the outdoor space. With a height of 180 cm and well-set posts, a wooden slat fence is within the reach of a beginner DIYer, over a weekend for around twenty linear metres. The secret of a durable fence lies in the quality of the wood treatment and the bedding of the posts.
Choosing the wood and the dimensions
For a fence, you combine posts set in the ground with vertical or horizontal slats. Square posts of 80 × 80 mm or 100 × 100 mm in class 4 pressure-treated pine are the benchmark for the buried parts: they resist prolonged contact with damp soil. Slats of around 140 × 22 mm, also pressure-treated, give a good surface. Allow one post every 180 cm or so.
- Posts 80 × 80 or 100 × 100 mm in class 4 pressure-treated pine
- Slats of around 140 × 22 mm, pressure-treated or to be stained
- Stainless steel or galvanised screws 5 × 60 mm
- Ready-mixed concrete for bedding (one 35 kg bag for 2 to 3 posts)
- Chalk line, pegs and spirit level for marking out
Marking out and bedding the posts
Mark out the alignment of the fence with a chalk line. Space the posts no more than 180 cm apart: beyond that, the slats can deform in the wind. Dig holes of about 30 × 30 cm and 50 to 60 cm deep for 2 m posts, i.e. roughly a third of the above-ground height buried. Set them in ready-mixed concrete checking the plumb with a spirit level, then let dry for at least 24 hours before fixing the slats.
- Mark out the footprint with a chalk line and locate the post positions (every 180 cm)
- Dig the holes of about 30 × 30 cm and 50 to 60 cm deep
- Place each post and set it in concrete checking the plumb
- Let the concrete dry for at least 24 hours before any fixing
- Fix the bottom and top rails between the posts
- Screw or nail the vertical slats, spaced or flush depending on the desired look
- Apply a finishing wood stain if the wood is not pressure-treated
Finishing and long-term maintenance
A pressure-treated pine fence naturally turns grey over time, which is normal and does not affect its strength. If you prefer a wood shade, apply an exterior wood stain or wood preserver in two coats, starting at the bottom. This maintenance should be renewed every 1 to 2 years. A gap of 1 to 2 cm between the slats and the ground stops the wood from sitting in rain splashes.
The tools you need
Installing a fence needs few tools, but they must be suited to the soil and the concrete. A hand auger or a marking peg makes digging the holes easier; for hard ground, hiring a mechanical auger can prove faster. Wear gloves to handle the raw wood and the concrete, and safety glasses when cutting and screwing.
- Spade and pickaxe, or a hand auger for the holes
- Wheelbarrow and bucket for the ready-mixed concrete
- Spirit level (ideally a long straightedge or a builder's level)
- Circular saw or miter saw to trim the slats
- Drill driver, impact driver, tape measure and chalk line
How much does a wooden fence cost?
The price varies with the height, the post section and the quality of the wood. In pressure-treated pine, allow in general from 25 to 45 euros per linear metre installed by yourself for a 180 cm height, materials included. A 100 × 100 mm post 2 metres long costs about 8 to 15 euros, a 140 × 22 mm slat 1.80 m long about 2 to 4 euros, and a 35 kg bag of ready-mixed concrete 5 to 7 euros. For twenty linear metres, the material budget works out at around 600 to 900 euros.
The mistakes to avoid
- Burying untreated posts: they rot at the ground line within 2 to 3 years
- Post spacing that is too wide: the slats flex and buckle
- Forgetting the plumb: a leaning fence is immediately visible and becomes weaker
- Drilling the slats without pilot holes near the edges: the wood splits
Installing a wooden fence in the garden calls for good preparation rather than complicated technique: posts spaced 180 cm apart, set in at least 50 cm of concrete and in class 4 pressure-treated wood, guarantee a straight, durable structure. The gap at ground level and regular wood stain maintenance complete the installation. Allow a weekend for around twenty metres, and enjoy a more private, more structured garden.