Danez
Member
- Messages
- 468
- Location
- Lancashire, England
I relate to this too muchGosh!! I'm really milking this forum of late.. hopefully one day i'll be able to give back!
I relate to this too muchGosh!! I'm really milking this forum of late.. hopefully one day i'll be able to give back!
but what your saying is for new houses with old houses like ours its soiled filledWest walls = subject to UK prevailing SW winds & driving rain. Never cavity fill such walls in exposed areas of country, ie. places with a fair bit of rain... Many older cavity walls are clogged with brickies mortar droppings that sit in clumps in the lower courses & on the wall ties, which bridges the damp from outer to inner walls. Draws damp in & contributes to ties rusting, swelling & cracking the mortar lines. As well as damp inner walls. That said, it could just be condensation from lack of ventilation. Breath / body moisture + bathing, washing, cooking with lids off. All that warm air condenses on cold walls & ceilings. Worse when no vents. You can get passive wall vents that have a batt of rockwool in them so you don't get the draughts; unlike old-fashioned vents.
If cavity walls then even 50mm of internal insulated plasterboard on coldest external walls makes a big improvement to warmth & reduced damp. If solid walls, they must breathe (no gypsum plasters etc!).