Floors are the part of a timber cabin nobody photographs and everybody feels. Roofs and glazing get the attention, but on an Irish site — damp ground, mild wet winters, a slab that never really dries out in February — the floor build-up decides whether a garden room in Cork is somewhere you sit all evening or somewhere you keep your coat on. It is also one of the few things that is genuinely awkward to change later, so it belongs in the specification from day one.
Insulation Comes Before the Finish
Under the visible boards sits the layer that actually does the work. On a joisted timber floor we insulate between and under the joists, with a ventilated void beneath so moisture from the ground can move away rather than sit against the timber. On a concrete base, rigid insulation goes above the slab with a damp-proof membrane below it. Either way, the aim is a continuous layer with no gaps at the perimeter, where most of the heat quietly escapes. Skimping here shows up directly in running costs and in your year-round cabin's comfort — and in its BER if it is ever assessed.
Choosing the Surface
- Engineered wood: the usual choice. Stable in changing humidity, warm underfoot, and it can be re-finished once or twice.
- Solid pine or spruce boards: the most natural match to log walls, but they move with the seasons and need a proper acclimatisation period before fitting.
- Laminate: the budget option, fine for a garden office; less forgiving of spills and standing water.
- LVT or vinyl plank: the sensible answer for a shower room, utility corner or a holiday cabin that gets wet feet all summer.
- Tile: only over a rigid base — a tiled floor on a springy joisted deck will crack at the grout lines.
Underfloor Heating: Worth It?
In a well-insulated cabin, electric underfloor mats under tile or LVT are cheap to install and pleasant in a bathroom or entrance. A full wet system rarely pays for itself in a small garden room, but it makes sense in a granny flat or a permanent home where it can run at low temperatures from a heat pump. The decision follows the insulation, not the other way round — see how we handle heating and thermal performance and which build materials we use as standard.
Planning a cabin for year-round use? Tell us how the floor will be used and we will quote the build-up that suits it.