If you bought that bunk bed when your little ones were still small, you might be noticing some wobbles and creaks now that they’re a few years older and a lot heavier. Maybe you’ve already heard the dreaded groan when your oldest clambered up to the top bunk, or you’ve seen the guardrail shift just a little too easily. The truth is, many bunk beds on the market are designed with younger children in mind—typically up to about 90 pounds per bunk. Once your kids hit the tween or teen years, that weight limit gets tested, and the bed can start to feel less sturdy. The good news? You don’t have to scrap the whole thing and buy a new one. With a few simple DIY reinforcement tricks, you can make that bunk bed rock-solid for years to come, saving money and keeping your kids safe.

Start by checking all the joints and connections. Most bunk beds are held together with bolts, screws, or metal brackets. Over time, these can loosen from daily use. Grab a basic socket wrench or a screwdriver and go around every connection you can see. Tighten everything carefully—don’t overtighten, as that can strip the wood or metal, but make sure nothing wiggles. Pay special attention to the corners where the bedposts meet the side rails. If the bolts seem stripped or the holes are getting worn, you can upgrade to heavier-duty hardware. A common fix is to replace the small wood screws with longer structural screws or even carriage bolts that pass all the way through the wood and lock with a nut on the other side. This gives a much stronger hold and distributes weight better.

Another weak spot is the slats that support the mattress. Many budget bunk beds use thin wooden slats that can bow or snap under a heavier sleeper. You have a few options here. If the slats are spaced too far apart, you can add more slats in between. Pick up some 1x3 or 1x4 lumber from the home center, cut them to the same length as the existing slats, and screw them into the side rails. Space them no more than three inches apart for good support. Even better, you can replace all the slats with thicker pieces, like 3/4-inch plywood cut into strips, or buy a set of heavy-duty metal slats that come with built-in center support. If your bunk bed doesn’t have a center support beam running underneath the mattress platform, adding one is a game changer. A simple 2x4 running lengthwise down the middle, supported by a couple of legs that reach the floor, can make the entire sleeping surface feel like a concrete slab. Just make sure the legs sit on a solid, non-slip pad so they don’t scratch the floor or move around.

Don’t forget the guardrails. These are critical for safety, especially if your kids toss and turn. Over time, guardrails can become loose or flimsy. Check how they attach to the bed frame. If they’re just held by a few small screws, consider reinforcing them with metal brackets or corner braces from the hardware store. You can also add a second rail on the top bunk, or extend the existing one to cover the entire length of the bed except the small gap needed for getting in and out. For extra security, install a cleat underneath the guardrail—a small block of wood screwed into the frame that prevents the rail from sliding down.

If your bunk bed is a twin-over-twin design, the ladder is another area that takes a beating. Children love to bounce on ladders or slide down them, and the joints can loosen. Remove the ladder and inspect where it attaches to the bed. If it uses hooks that slip into brackets, those hooks can bend or wear out over time. Replacing them with heavy-duty ladder hooks or even bolting the ladder directly to the frame can eliminate wobbling. For a really sturdy feel, you can add a third point of contact—a small wooden cleat on the floor that the bottom of the ladder rests in, keeping it from sliding side to side.

One often overlooked reinforcement is the bed’s overall lateral stability. If your bunk bed shakes when a kid rolls over, it might be because the frame has no cross-bracing. You can add a simple diagonal brace on the back or side of the bed, connecting a top corner to a bottom corner. A 1x4 board cut at an angle and screwed securely to the frame will dramatically reduce sway. For metal bunk beds, you can buy cheap L-brackets or even use steel corner plates at each joint.

Finally, give the whole bed a good once-over for any loose trim pieces, decorative knobs, or sharp edges that could catch clothing or hair. Sand down any splinters on wooden parts, and if the paint is chipping, scrape it off and apply a non-toxic, child-safe paint or sealant. While you’re at it, check that the mattress foundation is solid—no gaps or rotting wood. If you have a bunk bed that’s been through several kids, it might be worth flipping the mattress or replacing it with a new, firmer one that better supports older bodies.

Reinforcing a bunk bed doesn’t have to be expensive or complicated. Most of these fixes use basic tools and materials you can find at any home improvement store. The payoff is huge: a safer, quieter, and more comfortable bed that grows with your children. And hey, you get the satisfaction of knowing you did it yourself. So grab your drill, tighten those bolts, and give that bunk bed a new lease on life. Your kids—and your peace of mind—will thank you.