Replacing a slat on one of our wooden park benches is a moderately straightforward DIY project that most people with basic tools and some patience can handle. The difficulty isn't high, but it does require careful steps for a safe and lasting repair.
First, assess the damage. Is it just one slat, or are the supporting structures also compromised? You'll need a few tools: a pry bar or claw hammer, a saw (like a circular saw or handsaw), a drill/driver, sandpaper, exterior-grade wood screws, and a matching replacement slat (typically pressure-treated lumber or a durable hardwood like oak).
Start by safely removing the broken slat. Carefully pry it up, avoiding damage to the adjacent good slats and the bench's frame. Once removed, clean the area and use the old slat as a template to measure and cut your new piece to the exact length. Pre-drill holes to prevent the new wood from splitting when you screw it down.
Position the new slat, ensuring it's aligned and level with the others. Secure it firmly with corrosion-resistant screws designed for outdoor use. Finally, sand the new slat smooth to match the bench's profile and apply a weather-resistant sealant or stain to protect it and help it blend in.
While the process is simple in theory, the main challenges are ensuring a perfect fit and using the correct, durable materials. If the bench frame is rotted or if you're unsure about structural integrity, consulting a professional is wise. For a single slat replacement on a sound frame, a weekend afternoon should be all you need to restore your bench to perfect, safe condition.