Condensation problem, have tried everything but it still persists, can anyone help?

Question

It started with damp black marks on the inside of every exterior wall, and it was especially bad behind furniture. We were told it was condensation, so we put thermal boarding up, and added loads of extra air vents, but still the problem returns. We even fixed the roof, guttering and the external rendering, but nothing seems to work, can anyone have any suggestions, I am totally desperate?!?!

I just had a new damp course put in a year ago

Answer 1

it sounds a little like rising damp, if your house is of traditional brick and block build with a cavity, some sort of damp is penetrating the walls (from the side or possibly underneath) and is bridging the cavity to reach the internal skin of the wall.
it may be a good idea to get a surveyor to look over it, they are the best people to ask about defects, good luck with it, my dad had a similar problem and after a survey he knew what work was required!

Answer 2

Dont put a water seal on your walls cos if they are damp then the seal will seal it in and the problem will never go away. Try consulting a professional again to see what can be done. You may have a problem under the house what is causing it. Get several opinions first and obviously the cost will come into it.
See if you can get a Condensation Test kit and check your walls to make sure that it is condensation first. Try this site as you can get anti-mold treatment and also Ultra -Proof which goes on the outside and allows the bricks etc to breathe.

Good luck

Answer 3

is it a brand new house?? if so the problem may be that the house can't "breathe"
the newer houses out there are so weather tight, that they dont allow any air to escape from them. if humidity levels rise in the house due to doing dishes, taking showers and so on the steam created can not escape it cools then condenses on everything.
be sure to check that the vents in the bathrooms are vented outside the home, also it may be helpful to install a range hood that vents outside rather than the type that just blows the air back into the kitchen

Answer 4

There are purely 2 basic treatments for condensation: one million) air flow. Get a fan extractor put in and use it each time you bathe/bathe - additionally stable for removing smells. interior the wintry climate/chilly months, bypass away the door open while the room isn't getting used; interior the summertime bypass away a window open, and proceed to apply the fan. 2) Heating. interior the wintry climate/chilly months shop the washing room heated - this will develop the the dew factor and enables the air to 'carry' greater water earlier it condenses. it might desire to help in case you examine the insulation on your chilly water tank [in case you have one]. There must be a robust thickness of insulation all around and on appropriate, yet none below [no roof insulation decrease than the tank, that's going to abut the insulation on the facets of the tank]. this would possibly not in basic terms ward off the tank freezing, yet will average the water temperature so as that it's not so chilly while it gets to the bathroom cistern [WWP].

Answer 5

Knock off a small piece of plaster from the wall. If the brickwork and plaster is damp underneath then you have penetrating damp not condensation. Penetrating damp is moisture coming through from the outside either up through the damp course or through porous brickwork.

Answer 6

We had the same problem and our apartment is Brand new. Now we leave the heater on low during the night and the blinds up at the bottom slightly to get abit of air to it. Worked a treat

Answer 7

New Dampcourse all round and coat exterior walls with Thomson Water Seal

Answer 8

check under the house for dampness,it could be rising from the soil,
use exit mould on wall surface.

Answer 9

buy a de-humidifier.leave running on full power for 24 hrs then set control to half and run for 48 hrs.This should cure your problem.

Answer 10

try a dehumidifier