A home inspector I know was recently telling me a story about this deck he checked out.

He had both the buyer and seller join him on the deck, and then he stood with his feet slightly apart and moved back and forth. The whole deck swayed with him and everyone on the deck ran for the door. And this was a deck he was assured was a safe structure.

With a long summer of barbecues and cookouts ahead, people are going to be spending more time outside, on their decks, and if you’re not sure if your deck is going to hold up like it should, it’s a good time to get it checked out before disaster happens.

At least 30 deaths have been reported as a result of deck collapses over the past several years. Nearly 40 percent of List members who reported having been on a deck that collapsed said the fall came because there was too much weight on the deck. Thirty percent blamed rotting wood.

If your deck sags or bounces, it needs professional attention. You should also test your railings and banisters and secure any that might be loose. Your railings should be at least 36 inches high, and the rails no more than 4 inches apart. If you find any nails, screws or anchors that are loose, rusty or corroded, replace them ASAP!

Soft spongy wood is an indication of decay, which could lead to big trouble. Small holes in the wood could be a sign that insects, like carpenter bees, are causing structural problems.

If you’re going to need extensive repairs, or a new deck entirely, make sure to look for a well-regarded professional. If you’re set on building your own deck, do everyone a favor and get it inspected before your first outdoor event.