The weather may cause all woods (pressure treated or not) to expand and contact which occasionally can result in a cosmetic naturally occurring ‘split’ in all timbers. Unfortunately this is something we cannot 100% guard against but can reassure that this is not structural weakness.
We endeavour to use quality locally sourced pressure treated timber to limit this happening but have a few advisory actions to take should you need to cosmetically hide any minor imperfections that may appear over its time.
Apply a small amount of Ronseal High Performance Wood Filler – ( Natural)
Allow to dry and lightly sand with fine sand paper
Apply 2 x coats for paint / stain