Basement Flooding Cleanup in Manchester, NH

A Manchester basement can flood from almost anything: a burst pipe, a failed water heater, a sump pump that quit, groundwater in spring, or a floor drain that backs up in a storm. The first job is the same every time. The extraction crew pumps out the standing water, figures out which category it is, and only then decides what can be dried and what has to go.

What floods Manchester basements

• Supply lines, boilers and water heaters that fail in the basement itself
• Sump pumps that die or get overwhelmed during a thaw or a long rain
• Groundwater pushing through old fieldstone and brick walls in spring, covered on the foundation seepage page
• Floor-drain backups in the older parts of the city, where storm and sewer water share pipes

Finished basements versus old cellars

Finished lower levels in the South End and out toward Lake Massabesic have carpet, pad and drywall that hold water. Clean water caught early can often be dried in place; the drying team may cut the bottom of the drywall to open the cavity, a flood cut, when water has wicked up. Category 2 and 3 water means carpet, pad and the lower drywall come out.

Unfinished cellars under older homes and triple-deckers have concrete or dirt floors and stone or brick walls. There is less to remove, but those walls hold moisture and the space is often poorly ventilated. LGR dehumidifiers do most of the work, with air movers on the floor and wall base.

Keeping the damage from coming back

Once the basement is dry, it is worth looking at why it flooded. A battery backup on the sump pump, a backwater valve on the floor drain and gutters that carry water away from the foundation solve many repeat floods. FEMA flood maps show whether a property sits in a mapped flood zone, and the National Weather Service explains flood alerts.