How do I attach wooden fence panels to concrete posts without grooves?

Since your concrete posts don’t have grooves and you can’t drill into them, you’ll need to create a frame or bracket system that allows your wooden panels to be mounted securely without modifying the posts. Option 1: Use Fence Post Brackets or U-Clamps • Look for heavy-duty fence post brackets or U-shaped metal clamps that can wrap around the concrete post. • These brackets can be tightened using anchor bolts or sleeve bolts that grip around the post instead of going through it. • Once the bracket is secured, screw your wooden rails (horizontal battens) onto the brackets and then attach your fence panels to those rails. What to buy: • Adjustable U-bolts or post clamps (galvanized steel to resist rust) • Timber rails (pressure-treated 2x4 or similar) • Exterior wood screws or decking screws ⸻ Option 2: Build a Free-Standing Timber Frame Between Posts If your posts are more like boundary markers than load-bearing supports, consider: • Installing wooden posts or timber uprights directly between each pair of concrete posts, using post supports or concrete anchors fixed to the ground. • Then, fix your panels to the wooden frame as normal. This method doesn’t rely on the concrete posts for strength—it simply keeps the fence line straight and visually aligned. ⸻ Option 3: Use Metal Fixing Straps • Buy galvanized metal fixing straps (also called band straps or universal fixing plates). • Wrap or screw these straps around the post (if it has side holes or indents) and use them to hold horizontal battens in place. • Fix your panels onto those battens.