CONDENSATION FROM CONCRETE FLAT ROOF

GAZZA26

HI, I HAVE A SLOT EXTENSIONS ATTACHED TO OUR KITCHEN. ITS A CONCRETE ROOF BUT GUESSING THE AGE OF THE BUILDING (1960) IT ISNT INSULATED. THE TOILET PART OF THE EXTENSION IS STARTING TO ATTRACT CONDENSATION AND MOULD ON CEILING, ALL THE OTHER PART OF THE EXTENSION IS OK. IM GUESSING THIS IS BECAUSE OF THE CONCRETE ROOF, IVE HAD THE FLAT CONCRETE ROOF FELTED ON THE OUTSIDE SO I HOPE ITS NOT LEAKING. HOW CAN I STOP THIS CONDENSATION PROBLEM, PLEASE HELP.

maaaaaaaaat

you need warmth and ventilation.

ban-all-sheds · Posted: Fri Nov 06, 2009 7:06 pm Post Subject:

And you need to stop shouting.

__________________
I mustn't warn people that the "experts" on the plumbing forum can't be trusted to tell the truth.

GAZZA26 · Posted: Sat Nov 07, 2009 9:44 am Post Subject:

How do i go about fixing this problem?

roy c · Posted: Sat Nov 07, 2009 9:56 am Post Subject:

Can you get us a pic up? Its hard trying to visualise it, you might be able to cross batten it and fill the gaps with polystyrene,and then put poly-backed plaster board over the top..Have you got good ventilation in the room?

GAZZA26 · Posted: Sat Nov 07, 2009 10:00 am Post Subject:

I have a window in the toilet and one exterior air brick near bottom, would putting an air brick near top of wall would help. I have abut 20 cm gap from ceiling to window is this enough gap to put insulation in

roy c · Posted: Sat Nov 07, 2009 10:18 am Post Subject:

That would be plenty. The battens are 1" thick and the poly-backed p/board could be from 22mm up to 2or 3 inches. But 22mm would be sufficient. Make sure the battens are 2x1" tanalised roofing battens...Another air-brick higher up wouldn't do any harm, but I think when you have equalised the ceiling to the same warmth of the room you should be ok, Hope that makes sense?

I think its a case of hot air or warm air hitting cold....

GAZZA26 · Posted: Sat Nov 07, 2009 12:25 pm Post Subject:

I HAVE JUST MOVED SOME STUFF FROM AROUND THE TOILET AND NOW FOUND MOULD AROUND THE TOILET WALL ASWELL, WOT SHOULD I DO

roy c · Posted: Sat Nov 07, 2009 1:07 pm Post Subject:

give it a wash down with bleach and dry it off then dont put any more stuff around the toilet.It seems like a classic case of condensation,(black mould on the bottom corner of the walls....)

GAZZA26 · Posted: Sat Nov 07, 2009 1:09 pm Post Subject:

IF YOU KNOW WHO DO I NEED TO CONTACT TO GET THIS SORTED (TRADESMAN) AND HOW MUCH WOULD IT COST

roy c · Posted: Sat Nov 07, 2009 1:29 pm Post Subject:

Sorry but that is as much as I know, hope it's helped you