Hi just a quick thought from reading. how old are the windows? the gasket on the window may have broken down and gas may be gone from between the two panes of gas causing window to be a thermal bridge and then would make condensation worse than normal.
Magpie16 - Windows were all brand new when we was building...
Woody - Windows were put in and sealed with silicon, since then we have recently rendered, so I think all external sealent is good...
When you say cut the reveal... what do you actually mean ? take a hammer and chisel and "smash" the whole reveal out ? after I do that I will have to re dot n dab and plaster and decorate.... ? Or is there a easy / neater way ?
Not sure where you mean to insall the DPC ? or do you mean fit a cavity closer in the cavity ?
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local