Mould on Some Roofing Timber

[Gaf]

Not sure if I should have this in the "Damp" forum.

 

New build house. Whilst inspecting some timber work on two roofs for another purpose, I noticed what I thought looked like mould growth on a small number of timbers. Google suggests some view this as a concern that should be remedied but others suggest this is typical enough for timber and likely occurred in the yard before it even arrived on site.

 

Anything to worry about, or best left alone?

[Iceverge]

More context and picture please.

 

Are the timbers damp?

 

I assume it is a cold attic ventilated above the timbers. Are these vents clear? 

 

Very importantly is the extractor from the bathroom correctly routed to outdoors and working efficiently? 

 

Was there any vapour control layer installed below the attic joists? 

 

 

 

 

[Gaf]

18 minutes ago, Iceverge said:

More context and picture please.

 

Are the timbers damp?

 

I assume it is a cold attic ventilated above the timbers. Are these vents clear? 

 

Very importantly is the extractor from the bathroom correctly routed to outdoors and working efficiently? 

 

Was there any vapour control layer installed below the attic joists? 

 

 

 

 

 

Sorry yeah that was scant on detail, wasn’t a great post.

 

I can’t get better photos as that timber is up high and I only got those from strapping my phone to a stick.

 

Roof only done a couple of weeks. Only the felt is currently on the roof (no slates till next week). No ceiling work done (no VCL yet) and just exposed at the minute. Windows are in. Timbers were exposed to the elements for maybe two or three weeks before felted. I can’t see if they’re particularly damp.

 

 

[Iceverge]

It's probably nothing to do with you house so. Mould from timber storage. I'd just ignore it.

 

It'll die when there's no more moisture present. 

[Conor]

7 hours ago, Gaf said:

 

Sorry yeah that was scant on detail, wasn’t a great post.

 

I can’t get better photos as that timber is up high and I only got those from strapping my phone to a stick.

 

Roof only done a couple of weeks. Only the felt is currently on the roof (no slates till next week). No ceiling work done (no VCL yet) and just exposed at the minute. Windows are in. Timbers were exposed to the elements for maybe two or three weeks before felted. I can’t see if they’re particularly damp.

 

 

Well there's your problem. Damp house, water getting in, no ventilation. It'll clear up eventually.