Reply To: White blotches on Ipe Decking

Shepherds Carpentry

Maybe a thorough treatment against mould is in order?

From google I pulled up two links here and here that could point to the problem being a type of white mould

The first link talks about the problem on a popular composite deck surface but the second appears to talk about it on wooden surfaces including the construction underneath.  

Have the seen the underneath of the deck lately? Could there be a problem with ventilation underneath the deck or a nearby waste water source for the spores to take hold from?

Good luck solving it in any case and please keep us posted