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About TerraFirma

Why your basement walls leak

Why your basement walls leak - Image 1

What causes water to leak into a basement? It’s easy to blame a wet basement on mistakes made during a home’s construction process, but that’s rarely the case. 

Instead, you should blame the inherent nature of your basement: the materials that are used and the way that it is situated below ground:

  • Basements are boxes built with cinder-block, stone or poured concrete and buried into loose and wet soil. Due to a phenomenon known as the "clay bowl effect" groundwater tends to accumulate outside the basement.

  • Concrete is a porous material, so groundwater can infiltrate it and evaporate into the basement. Concrete also tends to shrink and crack as it cures which creates more opportunities for water intrusion.

  • The mortar holding stone and block walls together tend to weaken and crumble due to soil and foundation movement. Water also tends to accumulate inside hollow cinder-blocks.

In other words, your basement leaks because there is too much water surrounding it.

In the rainy Pacific Northwest, a leaky basement is an all-too-common problem for homeowners, especially with older houses. There are countless ways you can temporarily fix the problem, but for a permanent solution, you’ll need to talk to a local professional.

TerraFirma can help with any water problems you might encounter in your basement or crawl space. Contact us today to schedule your free estimate!


our service area

We serve the following areas

  • Adams
  • Adrian
  • Arock
  • Athena
  • Baker City
  • Bates
  • Bridgeport
  • Brogan
  • Burns
  • Cove
  • Crane
  • Drewsey
  • Durkee
  • Elgin
  • Enterprise
  • Haines
  • Halfway
  • Harper
  • Helix
  • Hereford
  • Huntington
  • Imbler
  • Imnaha
  • Ironside
  • Jamieson
  • Jordan Valley
  • Joseph
  • Juntura
  • La Grande
  • Lostine
  • Meacham
  • Milton Freewater
  • North Powder
  • Nyssa
  • Ontario
  • Oxbow
  • Pendleton
  • Pilot Rock
  • Prairie City
  • Richland
  • Riverside
  • Summerville
  • Sumpter
  • Ukiah
  • Union
  • Unity
  • Vale
  • Wallowa
  • Westfall
  • Weston
Our Locations:

TerraFirma Foundation Systems
761 NE Garden Valley Blvd.
Roseburg, OR 97470

TerraFirma Foundation Systems
13110 SW Wall St
Portland, OR 97223

TerraFirma Foundation Systems
10111 S Tacoma Way D5
Tacoma, WA 98499

TerraFirma Foundation Systems
2001 NE 117th ST
Vancouver, WA 98686
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