readiescards Posted June 30, 2016 Share Posted June 30, 2016 I know it has rain and rained but this green mould on the inside of my part built dwelling looks rather concerning. This green mould is both on this internal wall and on another wall that is external. I also have black mould appearing on the first floor Posi joists Is green and black mould normal during a wet build? Link to comment Share on other sites More sharing options...
ToughButterCup Posted June 30, 2016 Share Posted June 30, 2016 There's free air circulation on your build, and thus no temperature difference between outside and inside...? Internal and external mould you say. So I may well be right. I'm making loads of shakes for my house. Storing them in open, but covered racks. Exactly the same spot mould. Don't worry in the slightest. 1 Link to comment Share on other sites More sharing options...
readiescards Posted July 1, 2016 Author Share Posted July 1, 2016 Phew. Thank you! Link to comment Share on other sites More sharing options...
Vijay Posted July 1, 2016 Share Posted July 1, 2016 so what causes it? Link to comment Share on other sites More sharing options...
ProDave Posted July 1, 2016 Share Posted July 1, 2016 I don't think the green is mould, isn't that moss growing? Something must be very damp for some reason? Link to comment Share on other sites More sharing options...
TerryE Posted July 1, 2016 Share Posted July 1, 2016 Life. If there is an untapped ecological niche and a suitable organism, then it will exploit the opportunity. In this case the build is just very wet, so this type of algal growth can get a hold as well as types of fungus. However unlike Ian I wouldn't be so relaxed about this. I'd want to get the build weatherproof and dried out as soon as practical. Link to comment Share on other sites More sharing options...
ToughButterCup Posted July 1, 2016 Share Posted July 1, 2016 2 minutes ago, TerryE said: I'd want to get the build weatherproof and dried out as soon as practical. Terry's right. Link to comment Share on other sites More sharing options...
readiescards Posted July 3, 2016 Author Share Posted July 3, 2016 On 01/07/2016 at 09:08, TerryE said: I'd want to get the build weatherproof and dried out as soon as practical. Yes indeed I so wish I could. We are getting there slowly. The main source of damp in these walls is the fact that the first floor is down 3 months ago but there was no roof covering (until last week) so the heavy rain in recent days lands on the first floor and then drains by running down the small gap between flooring and wall. Hopefully now roof covered (tiles on this week I think) it will be able to recover - if the sun comes out and stays out this summer that is! Link to comment Share on other sites More sharing options...
Declan52 Posted July 3, 2016 Share Posted July 3, 2016 Let it dry out and once dry a bit of bleach and wash it down and don't plaster it till its gone incase it blows. 2 Link to comment Share on other sites More sharing options...
HouseE Posted September 15, 2016 Share Posted September 15, 2016 (edited) I agree,Bleach can kill almost every species of molds along with their spores.It leaves the surface sanitized and resistant to future mold growth. Edited September 15, 2016 by HouseE spelling error Link to comment Share on other sites More sharing options...
Temp Posted September 15, 2016 Share Posted September 15, 2016 Tesco sell thin bleach very cheap. I dilute it 50/50 with water and put it in a Hozelock plant sprayer. Use it regularly in the shower and it stops mould forming on grout/silicon. Don't use a sprayer with brass parts or the bleach will corrode it. 1 Link to comment Share on other sites More sharing options...
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