johniosaif
Private Member
Lofts can craze especially with heat coming through velux and even through openings, I have often had to block of the heat to prevent crazing with tarps etc, dust doesn't cause crazing ,it causes debonding ,old sheets will dry faster and a light pva will stop this occurringive skimmed loads of lofts in heat waves its never crazed.....especially on new builds where plots are well insulated.
ive only seen crazed in minus temps.
i know im a greedy little c**t il throw a splash of water onto boards il leave it if it freezes.
your problem isnt the heat.
if the boards have been up a while it sounds like theve been covered in dust and not cleaned off.
the dust in lofts can be crazy..