Concrete wall in house has a lot of moisture paint keeps bubbling help?

just purched a house one of the rooms has what seems to be a partial concrete wall i think it was onece a chimeny that has been coverd it has alot of moisture which is causeing the paint to buble off and is turning the surounding walls yellow what do i do???Concrete wall in house has a lot of moisture paint keeps bubbling help?
The bubbling is called efflourescense -- it is caused by a calcium based acid formed when moisture interacts with the plaster or drywall. The acid is also most likely causing a lot of the yellowing problems, but yellowing can also be due to impurities coming in with the water.





You have to eliminate the source of the moisture and allow the wall to fully dry out afterwards, before painting. (2-3 weeks minimum dry out time, after final repairs.) Sometimes in severe cases, you need to demolish the old plaster or drywall to get rid of all the acid (and potential mold issues). But often you can just use a sealer in milder cases.





The moisture could be a roof or gutter leak, or condensation from icing issues. Problem could be your chimney (flashing or masonry) or breech in the roofing material. If it's a gutter leak, it is some sort of overflow problem. You need an established company that does roof and gutter work and is also familiar with masonry issues. Most slate and tile specialty roofing companies have this experience, but if you have shingles on you roof, they might not be interested. So it might take a little homework to find the company. You might actually need two different companies -- masonry company AND roofing/gutter company. Chimneys can sometimes be real devils to fix and get to a point where they no longer allow water to get inside.Concrete wall in house has a lot of moisture paint keeps bubbling help?
Like ian k said, seal it. The good concrete sealers are expensive but spend the money. This way you seal it once and forget about it.
You need to seal the wall fist, with,anti-fungal sealer
You need to find out where the damp is coming from first. It is no good covering it up with foil or painting it over - the structure will only crumble underneath. Get a reliable surveyor to check it out. If it is a chimney breast, it is possible water is leaking through a lead flashing where the chimney stack meets the roofline, or possibly the pointing of the brick work on the outside needs replacing.
go to a trade supplying paint store and by some oil based primer sealer.paint the whole affected area making sure you put a good coating of the sealer on.allow to dry thoroughly then decorate as you choose
An old fashioned remedy is to cover the wall in alluminum foil (cooking foil) before papering and painting!





But these days you can either get a damp specialist in or in diy stores they sell a damp paint that you paint on the wall before decorating.





If its that bad though, get a damp specialist to give a quote first and some advice.
If it was a chimney that is no longer in use then get the top blocked off to stop the rain getting in. However, if the wall has been cemented over recently it may be that it is efforlorescence which is when there is moisture in the wall but it will go in time. You could try a dehumidifier.
for concrete walls, our painter usually use a concrete neutralizer, before applying paints. Let this dry first before applying the first coating of paint or primer paint. Ask your hardware store on what paints are available in your area for concrete walls. Some paints are for wood only.