I’m finishing off our basement and noticed a little dampness on the foundation wall which is made of blocks. I have a half roll of Bituthene Membrane that I’ll probably through away if I can’t find a use for it. Is there any reason why I couldn’t use it on foundation wall before finishing it off?
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Over the long term, it won't stick. The pressure is from the exterior side, and the place to get rid of that moisture is on the exterior. Anything you put on the interior side of the block will simply trap moisture behind it. If you're wanting to put furring and sheetrock on the block, maybe a layer of 6 mil poly will help, but moisture will collect at the bottom of it.
Don't throw away the leftover bituthene. Drop by the nearest construction site and give it to them.
Edited 2/5/2005 1:33 pm ET by davidmeiland
I believe this last months Fine Home Building magazine had an excellent article that concerned insulating and finishing systems for basements.
Not that I have any first hand knowledge..........I'm STILL WAITING FOR MINE!!!
Eric
I Love A Hand That Meets My Own,
With A Hold That Causes Some Sensation.
You don't want the Bituthene on the inside of the house. Look at all of the health related disclaimers on the outside of the box.
The bituthene won't do you any good, IMO, but right now, how do we know if the little bit of moisture you see is penetrating from outsode, or condensing from inside?
Is it wetter in bad weather or shortly thereafter?
You can take a 2' square of plastic sheeting and duct tape to seal it to the wall for a few days. If moisture collects on the living side surface of it, you have condensation. If the oisture collects between the block and the plastic, you have poor drainage outside that needs exterior correction
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I agree with all that the Bitithene on the inside is a bad idea and passing it on to someone else always a good idea. If the moisture is an exterior related problem, I am always amazed at how well Thoroseal works in that situation (powdered cemetious sealer that you mix and brush or trowel on). However, this may lessen your problem at best. Unfortunately nothing will really solve your problem from the inside. You have to stop the moisture before it penetrates the perimeter of the wall, period.
Thanks -I'll try Thoroseal.