Chimney Inspection — Masonry, Flashing, and Fire Safety

I was on Trafalgar Road last Tuesday, checking out this gorgeous split-level from 1978, when I stepped onto the back deck and heard something that made my stomach drop. That subtle creaking sound when the whole structure shifts under your weight. The homeowner just smiled and said "oh, it's always done that" while I'm thinking about how many summer barbecues this family's hosted on what could be a disaster waiting to happen.

Sound familiar? You'd be shocked how many buyers get so caught up in the kitchen renovation or the finished basement that they barely glance at the deck during showings.

Here's what I find most concerning about deck safety in Oakville's older homes. These 1980s and 1990s builds often have decks that were added later, sometimes by enthusiastic homeowners who didn't pull permits or follow current codes. I've seen deck ledgers attached with nothing but a few lag screws into rim joists that were never designed to carry that load.

The Ontario Building Code has evolved significantly since these homes were built. Back then, you could get away with spacing joists 24 inches on center. Today we know 16 inches is much safer for most applications. The fastener requirements have changed too. What passed inspection in 1985 won't meet today's standards, and more importantly, won't keep your family safe.

Last month I was inspecting a beautiful home in Glen Abbey where the deck looked perfect from the house. Freshly stained cedar, nice railings, solid-looking posts. But when I got underneath with my flashlight, I found the beam-to-post connections were held together with carriage bolts that had worked loose over fifteen years of freeze-thaw cycles. The whole thing was essentially floating. Repair cost? $6,750 to sister new beams and properly secure everything.

Buyers always underestimate how quickly deck problems escalate. You'll see a little rust stain around a bolt head and think it's cosmetic. Six months later you're dealing with structural failure because water got into that connection and started rotting the wood from the inside out.

I pay special attention to deck height in these Oakville neighborhoods. Anything over 24 inches off the ground needs guardrails that meet specific height and spacing requirements. But it's not just about having railings. It's about having railings that can actually withstand the 200-pound load the code requires. I've grabbed plenty of railings that felt solid but pulled right out of their posts when you applied real pressure.

Here's something that surprised me just last week on Lakeshore Road. Beautiful stone house from 1962, deck that had been "professionally renovated" three years ago. The contractor had used the right fasteners and proper spacing, but they'd attached the ledger board directly to the brick veneer instead of the structural wall behind it. Guess what we found when I started poking around? The whole attachment system was pulling away from the house because brick veneer can't support that kind of load.

The flashing details are where I see the most problems. Water management around deck ledgers is absolutely critical, especially with our Ontario weather cycles. You'll get ice damming in winter, then rapid snowmelt in March, followed by those heavy spring rains in April. If water gets behind your ledger board, you're looking at rot, mold, and potentially serious structural damage to your house frame.

In my fifteen years doing this, I've never seen a deck failure happen slowly. When they go, they go fast and people get hurt badly. That's why I always recommend having a structural engineer evaluate any deck that's showing signs of movement, loose connections, or water damage. Yes, it's another $800 to $1,200 expense, but it's nothing compared to liability if someone gets injured.

What really gets me frustrated is seeing decks where previous inspectors just looked at the surface. Nice composite decking, sturdy-looking railings, fresh stain job. But the real safety issues are in the connections you can't see. The joist hangers that are pulling loose. The posts that aren't properly anchored to concrete footings. The ledger boards that are splitting along the lag screw holes.

I always check the footing situation too. These older Oakville properties sometimes have deck posts sitting on concrete pads that aren't deep enough for our frost line. Come spring 2026, you might find your whole deck has shifted because those footings moved during the freeze-thaw cycle. Proper footings need to go down 48 inches minimum in our climate zone.

Here's my opinion on deck maintenance. Don't wait for problems to become obvious. If your deck is over ten years old, especially if it's attached to one of these 1970s or 1980s homes, you should have it professionally inspected every few years. The cost of preventive maintenance is always less than emergency repairs.

The hardware matters more than most homeowners realize. Those galvanized bolts and brackets might look fine on the surface, but galvanized coating doesn't last forever in our humid Ontario summers. I recommend upgrading to stainless steel or hot-dipped galvanized hardware whenever you're doing deck work. The extra cost upfront will save you thousands down the road.

Your deck should feel rock solid when you're standing on it. No bouncing, no swaying, no creaking or groaning sounds. If you're questioning whether something feels right, trust your instincts and have it checked out. I've seen too many close calls in Oakville's older neighborhoods to take deck safety lightly. Get a qualified contractor to assess any concerns before you're entertaining guests this summer.