Help!
we built a small retaining wall using (untreated, but solid) oak sleepers (laid horizontally) a few years ago. The timber has a plastic damp proof membrane stapled to the back. This was to protect the back of the sleepers and prevent moisture in the soil from affecting the timber.
This year we have noticed an infestation of mould and mushroom growth appearing from the gaps and grain of the timbers.
Any advice on permanent solution(s)?
we built a small retaining wall using (untreated, but solid) oak sleepers (laid horizontally) a few years ago. The timber has a plastic damp proof membrane stapled to the back. This was to protect the back of the sleepers and prevent moisture in the soil from affecting the timber.
This year we have noticed an infestation of mould and mushroom growth appearing from the gaps and grain of the timbers.
Any advice on permanent solution(s)?