Low maintenance
Timber claddings such as Hemlock, Cedar, Spruce , Siberian and Shadow Gap might require maintenance every 2-6 years, depending on the wood.
No maintenance
Thermo (Ayous) Abachi , Astex Wood or Siberian Larch- Burn Wood will not require any maintenance.
Composite
If you want your garden room to maintain its new appearance in the long term, then you’ll want to consider a composite cladding board such as Vox , Y.E.S. & Hardie Plank.