There is mould on the rafters of my loft after a loft conversion was done by a loft company and roofer in late 2009 and early 2010.
In November 2009 the loft did get quite wet during the very wet spell when the roofers failed to keep the rain out.
This meant it took ages to dry out as "breathable" under-felt had been added beneath new tiles. And the loft area was not heated until the spring. This was not a cheap job.
However there is still some mould on the rafters - despite the whole loft becoming bone dry during the summer.
Is this a problem? I am concerned about dry rot. Should I get a professional around like Rentokill or other professional top take a look?
Please see a photo of the mould as it is now (30 Oct 2010) at: