Fair question! Our main driving force when designing our Elgar Garden Room range was to produce ones that are zero maintenance, as well as portable. And this is where the plastic coated galvanised steel option comes in. But we accept that many of you also like timber cladding. We get it...and we also love timber clad garden rooms. But they're low maintenance rather than zero maintenance. In effect, what we do, to reinforce our garden rooms's strength and durability, as well as their ability to fend off what the weather and other elements can throw at them, we build them in plastic coated galvanised steel. And then, if you want timber cladding, we install the latter on top of the former. Now, to give you an idea of the sort of price of having the more expensive type of timber cladding (e.g. red cedar)... This is most probably going to cost you, at most, in the hundreds rather than the thousands to kit out your new Elgar Garden Room with timber cladding. Obviously this is affected by the size of your garden room as well as how many windows you have and how much timber cladding you want. Also, timber prices vary all the time. So this also has an effect, albeit a small one on the price.