Efflorescence of basement walls
Our house was built in the mid 1940's. My husband says the basement was poured with dirty sand. We have pretty well sealed and stabilized the effloresce on the outside above ground (except in spots) with a Thorocrete product, but the inside walls have a lot of efflorescence. Does anyone have ideas on how to seal the inside walls without damage to the integrity of the walls? Is there any product like a laminate that we could apply that would stay and would stop the action? Or other products to apply? (I'm aware the outside below grade should be sealed, but I'm still not sure it would stop the inside efflorescence.)
NOT dealing with the problem will harm the integrity of the foundation more as time goes by.
What is efflorescence?
"The root problem of efflorescence is the moisture which carries the efflorescence to the surface. Moisture is a carrying agent that transports efflorescence through the concrete, thereby destroying concrete and steel inside the concrete which hold it together. "
There are A LOT of products on the market to help with this problem, some professional, some do it yourself. Research and talking to professionals will help you look for the proper solution for you. Checking the grade of your property and the downspouts around the home is #1. The less water towards the house itself the less efflorescence will occur. There are so much information on this on the internet that all you need to do is type in efflorescence into any search engine and you will not only find company profiles but products galore.
Of course attacking the source of efflorescence should be your main concern which is from the outside not the inside. So if you seal the outside below grade like you have above grade you will solve the interior problem and its cause. You will however ALSO need to clean the interior and seal those also.
A home that old has to be getting salts from somewhere and most likely it is from you ground water outside. Hope some of this helps.
Foundation masonry seepage
House is settling and the foundation masonry block under stairs going down to first level seeps during hard rain..Have resealed and put waterproof sealant on it..One year later ..seeped some more but not much..have put more UGL sealant on it ..what can I use as an overcoat so that this does not occur again??
I don't think you can put anything better on to seal it. If it settles more, a crack will open up again. You can make sure you are keeping as much water away from the house as possible. Make sure all the water off your roof is collected and directed away with gutters/downspouts and splash blocks or better yet pipe it away from the house by burying some drain pipe to lead it away.
We have a large crawl space/storage space in back of our garage and under our house. We'd like to use the space more, but now we need to crawl through a small 3 x 3 door to do so. We want to make a full-size door, but would need to cut through the foundation and re-route some gas pipes around the new opening to do so. Does anyone know if this is possible? Is it okay to cut into the foundation? Any idea of cost involved?
Sure it's possible to do what you say. Since you already have a 3-foot wide opening, all you'd be doing is making the doorway higher (or lower) so that you don't have to crawl through it. The only thing you'd have to worry about is that the frame above the door (presumably part of the sill) is adequately supported. You shouldn't take out any wood, just concrete. You can do that yourself by renting a masonry saw and cutting right through the concrete block -- if it's block. If it's solid concrete, it's harder and messier, and you'll wear out more blades. If you want to hire someone to do the work, expect to pay a couple of hundred dollars. The work is dirty, dusty, noisy, and generally unpleasant. That, along with the saw blades, is what you'll be paying for because it doesn't take that much skill to do it.
As for the gas lines, they can be re-routed just like water lines -- easier, in fact, because they are more flexible. Sorry, don't know the cost.
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