damp on cavity lintel

Hi,

Just finished building my brick shed but I'm having a problem with condensation on the inside of the cavity lintel for both my window and door.


How would I go about stopping this from occuring?

The shed is brick and block with a 100mm cavity filled with 75mm insulation in the walls, floor and 100mm for the roof (warm roof). There is currently no heating or anything in there, I'll be doing all that next year. Planning on plaster boarding the lot so maybe insulated plaster board on the lintels?

Any help would be appreciated,

Thank you for your time.

Why is the frame so far forward? It would normally cover that part of the lintel.

The plasterboard head will stop that condensation anyway. No need for insulated plasterboard.

The frame was installed centrally to the outer blocks with not much movement to either edge of the block either inside or outside. If it went inside much further it would have been hanging over the cavity and I was securing the frame with screws so needed to be in a position to drill into the block. My inexperience if I'm honest, not knowing I'd have this condensation problem.


I have that little gap on both the outside and inside of the frame before it would have been going over the cavity in which I couldn't secure it with screws. Obviously there must be a way to do that but i just thought that was how it had to go. That's how i had my house windows fitted by professionals with the same gap on the outside but that is solid brick where this isn't.

At least the condensation won't be a problem with plaster board in place. Thank you for that information, that's put my mind at rest. Apart from that little problem, my build went quite well thanks to advice from people on here, just needs another coat or two of exterior paint and it's finished on the outside

To be fair the plasterboard and skim should be enough to insulate that , but as woody says normally the window would be fitted a bit further back so that the inside of the frame is on the warm side of the polystyrene insulation. Windows can be fitted with straps into the inner skin rather than screwing through the frame

Thank you for the added confirmation of the plasterboard solving it I've used straps on my door but I had the same problem, i didn't want to come much further back as the frame would be hanging over the cavity with no support for the weight unless the straps will be strong enough to hold it but I din't think they was.

Either way, i'm happy that the plasterboard will be enough to stop the condensation form forming, thank you very much