Salem flooded basement cleanup

Groundwater is the main cause. After weeks of rain, saturated soil presses water through cracks, the wall-floor joint and old penetrations in basement walls. Hillside basements in South Salem also see water running downhill toward their uphill walls during heavy storms.

Plumbing failures, such as water heaters, washers and supply lines, flood basements year-round. Floor drain backups during storms are contaminated and need special handling.

River flooding is less common now that dams regulate Willamette tributaries, but Salem's history includes the 1964 Christmas flood, when Salem Memorial Hospital was evacuated, and the 1996 flood. ^[2] Homes near the river or creeks should know their flood zone. See our main flooded basement cleanup page.

South Salem rises into hills, and many homes there have daylight basements, partly below grade on the uphill side. Rain falling on the slope above runs toward that uphill wall. If gutters overflow or drains are clogged, water can pool against the wall and seep in. Uphill drainage, clean gutters and downspouts piped well away from the slope are the main defences.

See the Salem area page for more on Salem's neighbourhoods.

Where groundwater regularly enters, a sump pump in a pit at the low point, fed by drain tile, keeps the floor dry. The weak points are power outages during storms, stuck float switches and worn-out pumps. Test it before the rains start and consider a battery backup.

Check the contractor on the Construction Contractors Board's license search. Groundwater and outside flooding are commonly excluded from homeowners policies; sudden plumbing failures are commonly covered. The Oregon Division of Financial Regulation takes insurance questions. ^[6]

Basements in older Salem homes often hold boxes, furniture and family papers. Sort quickly: hard plastic, metal and glass can usually be cleaned; upholstered furniture, mattresses and cardboard that sat in groundwater or a drain backup usually cannot. Separate wet papers and photos before they dry stuck together. Photograph what you throw away.

In finished basements, carpet pad almost always comes out, drywall is cut a little above the wet line and wet insulation is removed so the concrete and studs can dry. Solid framing usually stays if it dries properly.

Many basement homes in Salem were built before 1978. Painted surfaces may contain lead, and some older flooring, adhesives and pipe insulation may contain asbestos. A careful contractor asks about testing before cutting or scraping anything.

After a flood, consider a drain pan under the water heater, braided washer hoses, a leak sensor and flooring that tolerates water better than carpet. If groundwater was the cause, fix the drainage before rebuilding.

Basement window wells are small open pits beside the foundation. In Salem's wet season, leaves clog their drains and heavy rain fills them until water reaches the window and seeps inside. Egress windows added during basement finishing have larger wells that collect more water. Clearing the gravel and debris at the bottom, checking that each well drains and fitting clear covers are simple, effective fixes.

If water came in through a window, the wall below it is often the wettest part of the basement and needs checking.

Concrete basement walls and slabs hold a lot of water and release it slowly, especially in a cool basement. Contractors measure the concrete and wait for normal readings before new flooring or framing goes back. Trapping moisture under new finishes leads back to musty smells and mold.

During intense storms, leaves block storm drains and water pools in low streets and yards, some of it reaching basement doors and window wells. Homes along Mill Creek, Pringle Creek and the city's other streams can see high water when creeks rise. If you live near one, keep belongings off the basement floor through the wet season and know your flood zone.