Serving Portsmouth
Groundwater & Basement Water Intrusion in Portsmouth, NH
Basement seepage, failed sumps and water through the slab are extracted and dried, and the path from the ground is found so the floor stays dry next season. The path from the ground is named first: through the wall, up through the slab, back through a drain, or from a sump that stopped. The space is extracted and dried, with the porous materials the water touched removed, and the delivery is addressed, because a dried floor only stays dry if the water stops arriving.
Independent local crews · scoped at the property
Often needed alongside
- Structural Drying & Dehumidification
Sealed air movers and dehumidifiers bring framing, subfloor and drywall back to a measured dry standard, with daily readings logged from inside the material.
- Emergency Water Extraction
Standing water is pumped and extracted around the clock, before it climbs the walls and soaks the subfloor. Same-day response where coverage allows.
- Mold Inspection & Testing
An independent assessor confirms whether the assembly that got wet is actually dry, whether growth started while it was not, and how far it reaches.
Frequently asked questions
There is damp on every floor around the chimney. Is that three problems?
Almost certainly one. In a house framed around a central stack, water entering at the roof runs down the masonry itself rather than dropping into a ceiling, so it appears wherever the chimney passes a finished surface. The source is at the top and the marks below it are the path, not separate failures.
What is opened to dry it, given the age of the finishes?
As little as possible and as low as necessary. Base and casings around the stack come off first so the wall bottoms can breathe, and small openings are made where probe readings are high. Original plaster and trim are dried rather than removed wherever they are sound, which takes longer and is worth it here.
The stack is still damp in November. What does the winter do to it?
Wet masonry and a five-month freeze are a bad combination. Water held in a stack through repeated freezing takes the face off the brick and pushes the pointing out, so damage that was cosmetic in October is structural by April. The wettest month falls immediately before that, which is why autumn work is pushed hard.
The Portsmouth overview carries this FAQ with the city research.