Floor Repair on San Juan Island

This page is deliberately about repair. If you want a whole house re-floored, that is a flooring contractor’s job with a flooring contractor’s crew and I will refer you rather than take it on badly. What I do is the four or five problems that actually generate calls, and I do them properly.

Squeaks first, because they are the most common and the most satisfying. A squeak is almost always the subfloor separating slightly from a joist and rubbing on a nail as you step. Almost every house on this island is built over a crawlspace rather than a basement, which is genuinely good news: it means the best fix is available. From underneath I can find the gap, drive a shim in dry with construction adhesive, add a block or a cleat where the joist has twisted, and the squeak is gone permanently without a single mark on your finished floor. That is the right repair and it is the one nobody offers because it involves going into a crawlspace on this island in February.

When there is no access from below — slab, or finished ceiling underneath — it gets fixed from above with trim-head screws set into the joist and filled, or with a proprietary snap-off screw system through carpet. Both leave a mark, and I will tell you before I start exactly what the mark will look like.

Soft spots in the subfloor are the more serious call and they concentrate in predictable places out here. Inside exterior doors, under windows on the weather side, at the perimeter of bathrooms, and along an exterior wall where the crawlspace runs damp. The cause is usually one of three things: water getting past a threshold or a door sill, water from above, or humidity from the crawlspace itself condensing on the underside of the subfloor. That third one is very common on San Juan Island and is usually a torn or missing ground vapor barrier, blocked or wrongly managed crawlspace vents, or a downspout dumping right against the foundation. I check the crawlspace before I cut the floor, every time, because replacing a rotted sheet of subfloor over an unfixed moisture source is a repair with a countdown on it.

The repair is straightforward once the source is handled: cut the damaged subfloor back to the center of the joists on each side, add blocking so every edge is supported, install new sheathing glued and screwed, and rebuild the finish floor over it. If the joist itself is soft, that is where I stop and say so — a compromised joist is structural, needs a permit conversation with the county, and possibly an engineer. I hold a Washington general contractor registration and I will replace subfloor and sister nothing you were not told about. If your floor problem turns out to be a plumbing leak, a licensed plumber fixes that first. I don’t do plumbing work and won’t offer it.

Board and plank replacement is the third category. Damaged hardwood, a burned or gouged board, water-stained planks by a door, or a section of luxury vinyl plank that a dog or a dragged appliance destroyed. Solid hardwood can be cut out and woven in board by board so the joint disappears — the difficulty is never the carpentry, it is matching the material. Older island cabins are often laid in narrow fir that nobody stocks, and the honest answer is salvage: I look for a closet, a pantry, or under an appliance to steal matching boards from and patch the hidden area with new. Click-lock laminate and vinyl plank can be taken up and relaid to reach a damaged board, which is fiddly but very doable. If you have leftover boxes from the original install stored somewhere, dig them out before I come — that is the single thing that most improves the result.

Thresholds and transitions are fourth and they are underrated. A transition strip that has come loose is a trip hazard, and exterior door thresholds are where island water actually gets into a floor. An adjustable aluminum threshold with a sound door sweep, sealed properly at the ends where water always enters, does more for a wet entry than anything else you can spend an hour on. Interior transitions between rooms at different heights get a proper reducer cut to the actual gap rather than a strip forced over it.

One last thing about island hardwood that saves a lot of worry. Solid wood floors here move seasonally more than mainland floors, because the indoor humidity in a house that is closed up and damp all winter and dry and open in August swings a long way. Gaps that open between boards in late winter and close in summer are the floor doing what wood does, not a defect and usually not worth chasing. Gaps that stay open year-round, cupping that does not flatten, or a board that has crowned are a moisture problem underneath, and that is worth a crawlspace visit. I will tell you which one you have, and often the answer is that you should leave it alone.