White mold in roof

MikeJXE

The floor can be on the insulation as long as it's not squashing it. 

What's important is the gap between the insulation and the tiles at the eves 

Air comes in from the outside under the soffit (the wooden frame that hold the gutter) from front and back of the house.

Can you say where the vents are ? in the ridge or in the brick gable like an air brick 

sarah69696pink

So what I’m assuming (maybe incorrectly!) are the vents are two sort of guttering like pipes coming into the roof itself. 

stuart45

Put some photos on. You may only have eaves to eaves ventilation. 

MikeJXE

sarah69696pink said:

So what I’m assuming (maybe incorrectly!) are the vents are two sort of guttering like pipes coming into the roof itself. 

Lol keep persevering we will get there in the end. Can you take a photo ?

Klare1

We’ve just moved into a property a little older than yours, and the survey picked up white mould in the roof.  The surveyor recommended ventilation and insulation. So vents maybe the answer to your issue. At the moment our loft hatch is only large enough for a six year old child, so we need to address that as well as insulate/ventilate.  

sarah69696pink

Sorry I’m totally new at this!! Here is a pic of what I thought were vents! 

MikeJXE

It might be a vent but it's not providing adequate ventilation to the loft.

If the facts are 

1) The loft is many many years old and never had white mould.

2) It does now 

So what has happened between that is causing it ? 

locky123

https://www.youtube.com/watch?v=kvsPIlPMSZ4

MikeJXE

Excellent video but a lot of it is irrelevant to this property 

regarding the airflow it is, the sketches and the description are spot on 

I don't believe air is sucked from the living quarters  to any extent 

I still feel the air circulation via the eves has been reduced 

The difference between past and present is the builder fitting installation and boarding