Orange-brown stains (fungus?) on basement walls

1 of 1 people found this post helpful

Post Reply | Watch this Post

OK, here's the situation:

We're remodeling the basement in our old, 80 year old house.
The basement has seen seepage over the years, the walls
are bowed, the mortar was in poor condition.

We've regraded the foundation on all sides to keep the
water out, tuck pointed the mortar joints, then cleaned and
DryLok'ed the walls.

After applying the DryLok, orange-brown stains appeared
on the walls (fungus?), as well as dark grey stains (mildew, I believe).
So, we then applied a coat of the latex-based Kils Premier
stain blocker with an added mildewcide (just for good measure), which appeared to
solve the mildew problem.

However, we're still getting the orange-brown stains leaking through the stain blocker
on the lower blocks of the foundation.

What are the orange-brown stains? And, would using an oil based stain
blocker like the regular Kilz or Loc-Tite from MAB have
been a better solution than the latex Kilz Premier?

Thanks!