Downtown Prosper slab leak water damage

Buildings near the 1902 town site ^[1] vary. A later commercial building may be on a slab; an older house may be on piers with a crawlspace; and a storefront may be a mix, with an addition poured beside an older structure. So first establish what is under you. Look for a crawlspace hatch, foundation vents along the base of the wall or a hollow sound underfoot. Building records can help, and the owner may know. A leak under a raised floor is easy to reach, and it shows up on the ground below. A leak under concrete is a different job, as described on the slab leak page.

A restaurant, salon or café has more drains under the floor than most houses. A leak in a drain line under a slab will not move your water meter, because it sits on the waste side. Instead you might notice smell, damp near a floor drain or insects. A camera inspection is the usual way to look at it. This matters because the water involved is contaminated, and that changes what happens during cleanup. See sewage backup cleanup in this area if the source is a drain. Kitchens should also be kept informed about any health authority requirements.

In a row of businesses on one slab, water under the floor does not respect a demising wall. It may come up next door before it shows in your unit. So if you see moisture with no local source, ask the neighbors about theirs. Whoever owns the building generally has a key role, since under-slab lines are usually part of the building rather than the fit-out, but your lease controls. Keep the conversation factual and share readings. Decide early who hires the plumber, to avoid delays while everyone waits for someone else.

Opening a slab in a shop means noise, dust and a closed section of floor. Plan around your trading hours, and ask for dust containment. Check for reinforcing, and for any other lines in the same spot. Older concrete may contain unknown materials and repairs. Ask whether a reroute above the ceiling would be better, because it may avoid breaking the floor, although a line in a cold ceiling space brings freeze questions. Ask too whether the work needs a permit; Prosper's Building Inspections division can tell you ^[3].

Older tile, wood or sheet flooring can be hard to replace, and older adhesives or floor tiles can include asbestos depending on age. Ask about that before anyone scrapes a floor. Once tested and cleared, drying follows the normal pattern: lift what traps water, dry from the top and record readings. For raised floors, drying from underneath helps. Wood can warp when dried too fast. If trim has to come off, label it, because older profiles can be hard to reproduce. Stock stored on a damp floor should be moved and raised immediately.

Clay soils swell when wet and shrink when dry ^[2]. Older buildings have lived through many cycles of that, and they can show it in sloping floors and cracked masonry that may have nothing to do with any plumbing leak. A leak can, however, add to it. If you see new movement alongside water signs, take dated photos and ask an independent engineer. Keep gutters and downspouts running away from the wall, because older buildings may have little drainage protection at the base of the wall.

Downtown is changing under the 2022 master plan ^[4]. If street or utility work is nearby, check with the town about new connections and whether your service will be affected. If you are renovating, this is a good time to check under-floor lines and drains with a camera, and to replace old sections while the floor is already open. Records from such work will help the next owner, and they are worth keeping with the building's documents.

Your call connects to an independent contractor if one is available. Say what the building is used for, what it sits on if you know, and whether you own or lease it. Mention any food service and any neighbors involved. Ask if they do commercial work and how they handle after-hours scheduling. The contractor can talk through the drying; a plumber must find and repair the line.