The majority of deck boards are treated to Usage Class 3 (UC3) which will give a long-lasting deck around hot tubs in people’s homes. For holiday sites where parks are investing in dozens of lodges and decks, we would recommend increasing the treatment classification to UC4 or SS4 which will treat the timber with a higher percentage of preservative.
As hot tubs are likely to be used pretty much every day, the deck around the hot tub will often be wet for long periods of time as people make the most of it during their stay. If the boards are treated with usage class 3, the expected service life will decrease as timber treated to this classification isn’t meant to be exposed to moisture constantly which can happen around hot tubs.
Treating boards to UC4 or SS4 means that the boards are better protected and will maximise the service life and the investment made into the holiday site.