Thanks all - does seem a toothbrush and water can shift it somewhat. Will add in some salt, weak bleach and/more elbow grease.
Yup - can imagine single glazing would shift the problem. Not sure we have enough space for even thin insulation and plaster without losing light, though it does appear...
We have several windows with mould around the limestone windows. This is worst:
We've used biocide to kill the mould and are sorting out ventilation.
However it is very unsightly and I cannot know when new mould is reappearing. A lot of anti-mould products that contain bleaching agents...
Thanks. For the 3:1 - is that sharp sand? I guess it will need to be thick consistency to hold the weight of the step whilst it sets, but otherwise doesn't need any kind of shuttering (depending on the depth of the step, it'll need to be raised a few inches from ground level)
Okay, so I say cotswold cottage - it is vaguely honey coloured, the chippings are mouldy and the ants have moved in :-)
The old step is cracked and was also moved to replace a gas pipe and I've not been able to put back tidily or level. It was originally level with the inside of the house, the...
Ah okay - so that stopped condensation dripping back into the garage? Could still be wet on the metal, but that matters less in your case. In my case, the ply is still at risk (though out-of-sight, out-of-mind!)
How did you fix the sheets to the ply deck, avoiding any air voids? From what I've read, condensation could form in any unventilated air void and the sheet may hide it.
Storage only at the moment, but was intending to move some gym stuff in. That'd increase moisture (though the up-and-over door would be open), but I don't fancy that if there are a lot of mould spores.
Anyway, even just for storage I'm worried the deck is going to rapidly decay...
I think dry when installed, and for the autumn months no problems seen. Pretty sure it has kicked off in December due condensation.
I need to do something about it pronto?!
Concrete prefab garage has had a new flat roof, replacing corrugated cement board. That used to suffer badly from internal condensation in winter and I'd hoped the recent replacement ply decking+EPDM would fix it.
In the recent few months it has started to get black mould and feels damp to...