Basement Wall Condensation

[Jon Randolph]

Inspected a 1915 home the other day. There was condensationion the inside of the basement walls. I know that it was condensation and not seepage because it was all over the walls, above and below grade. Home had block foundation to about grade level then had brick foundation to the sill plate.

There was efflorescense in various areas around the basement below grade as an indication of past moisture penetration through the block, but all thas visible right now appeared to be condensation.

There were some moldy areas in the corners. Home was above sewer level as the sewer lines went through the concrete floor and the floor sloped to floor drains (assume they tied in to the sewer).

I recommended a de-humidifier to remove excess moisture from the area and advised that bleach may not be the best product to remove the mold since it is mostly water. Told them to investigate better commercial solutionsfor the mold. Should I have made any more recommendations.

[David Banks]

I have seen very heavy condensation in basements in New England on very hot humid days. Usually stone foundations and cement block. I owned a house built in 1825 and it would do this. I ran a fan and all was well.

[Jerry Peck]

"I know that it was condensation and not seepage because it was all over the walls, above and below grade."

Could be both.

The seepage allows excess moisture into the basement through the stone, then that excess moisture condenses on the cooler stone.