Why Winter Is Hard on Wooden Gates

British winters are relentless on timber. Driving rain, freeze-thaw cycles and long damp spells put a wooden gate through more punishment in four months than it sees the rest of the year combined. Water is the enemy: it swells the grain, seeps into open joints, and then expands as it freezes, prising timber apart from the inside. Left unchecked, a gate that looked perfectly sound in September can be sagging, splitting and growing mould by February.

The good news is that weatherproofing a gate is not difficult work. It is mostly a case of doing it at the right time, on a dry day, with the right products. Aim to get the job done in early autumn, ideally when the wood is dry and temperatures are still comfortably above 10°C, so any preservative or stain has time to cure before the wet weather settles in.

Start With a Thorough Inspection

Before you open a tin of anything, spend half an hour looking closely at the gate. You are checking for the small faults that let water in and hold it there.

• Raised grain: run your hand along the surface. If it feels rough or fuzzy, the grain has lifted, and those tiny fibres act like a sponge. Lightly sand it back with a medium-grade abrasive and dust off thoroughly.
• Open joints: check every mortise and tenon, every rail and brace. If a joint has worked loose, water will sit in the gap. Tap the joint tight and reinforce it with a suitable exterior screw or dowel before you treat the timber.
• Gaps and splits: small cracks in end grain and along rails are common. Fill anything wider than a hairline with an exterior-grade wood filler, and remember that end grain soaks up water faster than any other surface.
• Metalwork: hinges, latches and screws are the perfect route for water to reach bare wood. Check that fixings are tight and that any rusting screws or staples are replaced.
• Ground contact: look at the bottom of the gate and any posts. Timbers sitting in wet soil or against a damp wall will rot first. If there is a gap beneath the gate, keep it clear so air can move through and dry the wood.

Deal with all of this before you apply a finish, because coating over a loose joint or a soft patch of rot simply traps the problem underneath.

Choose the Right Preservative or Stain

For a UK winter, you want a product designed for exterior timber, and you want one that either penetrates the wood or forms a tough, flexible film that moves as the timber moves.

Wood preservatives soak into the grain and protect against rot, mould and insect attack. Solvent-based clear preservatives tend to penetrate deeply and are excellent for bare or previously untreated timber. Look for a product rated for exterior use and, where possible, one that offers some water repellency as well as fungal protection.

Exterior stains and microporous finishes add colour and a breathable barrier. Because they let moisture vapour escape while keeping liquid water out, they are far less likely to blister and peel than a solid film. A good-quality exterior wood stain in a mid-tone will also protect the timber from ultraviolet light, which greys and weakens the surface over time.

Whichever you choose, check the tin for drying times and the minimum temperature. Most water-based products need a day or two of dry weather to cure properly, so plan around the forecast rather than fighting it.

Prep, Apply and Protect

Preparation decides how long the finish lasts. Sand any bare patches, remove flakes of old coating with a scraper, and treat any small area of rot with a suitable wood hardener before filling. Wipe the surface down and let it dry completely.

Apply the preservative or stain with a brush, working it well into end grain, joints, the top edge of the gate and the underside of the bottom rail. These are the places water gathers, and they are the places most often missed. Two thin coats are far better than one thick one; allow the first to dry before adding the second. Take care to protect paving and plants below with a dust sheet, and always follow the manufacturer's guidance on ventilation and clean-up.

Once the finish is dry, give the gate a final check. A well-sealed gate should shed water rather than absorb it. If you spot a patch that looks dull or thirsty, give it another coat.

Small Jobs That Make a Big Difference

Weatherproofing is not only about coatings. A few practical touches will see your gate through the worst of the weather:

• Fit a gate stop or a rubber buffer so the gate does not slam against the post and loosen its joints.
• Keep hinges lightly oiled, and consider stainless or galvanised fixings if rust is a recurring problem.
• Trim back any shrubs or climbing plants that keep the timber permanently damp and shaded.
• If the gate stands in a very exposed spot, a small weatherbar or drip cap across the top rail will divert rainwater away from the joints.

Do this work once, before the first proper gales arrive, and your gate should come through winter looking straight, sound and ready for another year of use.

A Quick Autumn Routine

Make weatherproofing part of your autumn garden tidy-up. Wash the gate down, inspect the joints, sand any raised grain, fill the gaps, tighten the fixings and then apply your chosen preservative or stain on a dry, mild day. It is a couple of hours of straightforward work that will save you far more time, money and hassle when the rain sets in. Treat the timber kindly now, and it will reward you with many more winters of dependable service.