[broken link removed]Thanks for replies am near Cork so has any one any names of people in east cork area who do this work.
My parents got this done on the house and the condensation that has developed over the last few years is really terrible.
Newbie, do you know if it was 'stepped d/g units that were used', this is where the glass is s/g where it goes into the rebate but d/g from further up -you would see an unsightly black seal all around the edge of the glass.
If this problem just developed in recent years it could be that the seals in the units have broken down.
Is the condensation between the panes or on the inside of the window? Former as NHG points out is probably down to failed seals, latter is inadequate ventilation.