Return to the Basements Forum | Post a Follow-Up

Need suggestions for fixing, cleaning & water-proofing basement

Posted by mystiky (My Page) on
Sat, May 25, 13 at 12:33

We live in a 1930's all-brick house, and the time has finally come for us to do our basement, which has been already demo'ed. We live about 3/4 of a mile from the water, and we are about 70 feet above sea level. Thankfully, the basement has no leaks through any of it's walls or the floor

We need to fix a few tiny cracks (holes), scrape off the old paint/junk from the walls (blocks), have them waterproofed from any extra humidity / moisture and then painted. We will be using metal studs in the construction with green sheetrock everywhere (except ceiling), however there will be two machine-room closets (one for boiler / heater, and the other for electrical / gas meters) that will have the walls non-covered for access.

Can anyone suggest what water-proofing, crack sealent and paint to use so that it lasts well and the walls don't start peeling in a couple of years?

Also, any other suggestions are much appreciated.

Follow-Up Postings:

RE: Need suggestions for fixing, cleaning & water-proofing baseme

All you need to know on renovating your basement is at Building Science.Com.

Save your money on the miracle waterproofing paints.

The greenboard isn't much of an improvement on standard drywall. If you're really concerned, you can use Dens Plus or equivalent.

Instead, concentrate on keeping water far away from the exterior of your basement with functioning eavestrough, downspouts that take the water far away and proper grading. Use a moisture tolerant insulation--extruded or expanded polystyrene--in the thickness appropriate for your climate zone. (Not the same as the garden zone!)

Run a properly-sized dehumidifier to keep relative humidity under 50 per cent.

RE: Need suggestions for fixing, cleaning & water-proofing baseme

I am partial to the crystalline waterproofing products.

RE: Need suggestions for fixing, cleaning & water-proofing baseme

The wall has been partially parged, painted and coated, perhaps as remedies for past leaks. It requires such extensive work to make it ready for crystalline applications such as Krystol that's it's not likely a practical approach.

RE: Need suggestions for fixing, cleaning & water-proofing ba

Thank you for the feedback everyone.

It was suggested by someone that I should just used a product called "Fresh Cement", and go over all of the basement walls (concrete blocks) and to just seal them.

What about using wonderboard, instead of of green sheetrock? Or a combo of both?

Any comments on this?

This post was edited by mystiky on Mon, May 27, 13 at 14:42

RE: Need suggestions for fixing, cleaning & water-proofing baseme


Is there any difference between the Dens Plus boards or the regular Green Sheetrock rhat is sold at Home Depot?

I am not trying to save $2 / drywall, but want to know if it really matters.

RE: Need suggestions for fixing, cleaning & water-proofing baseme

DensPlus (and other non-paper-faced gypsum panels) are much more resistant to moisture than the green paper panels. That's why they can be used as tile backers. However, Dens Plus is much harder to prepare for painting than green board; it needs a skim coat.

Frankly, other than in a bathroom, I've never used anything other than standard drywall in basements. But I always have a dehumidifier running to keep rh below 50%. And keeping the drywall a few inches above the floor and using XPS under the baseplates protects the wall from minor flood damage.

Sealing the interior of a block wall--to the extent that the sealers can even do that--just means moisture accumulates in the wall and possibly causes damage.

RE: Need suggestions for fixing, cleaning & water-proofing baseme

Thansk again for the input. Turns out my local supplier doesn't carry the DensPlus anymore, but this one instead:


They said it is as good as the other one.

Here is a link that might be useful: National Gypsum Co.

RE: Need suggestions for fixing, cleaning & water-proofing baseme

Five alternatives in all:

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Basements Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here