FULL SERVICE DESIGN AND BUILD CONTRACT
The client wanted a sauna in their loft, built while the family was away over the summer holidays. We came recommended by a close friend, so they handed us the keys and we took the whole job from strip-out to final finishing and handover, a wider scope than our usual sauna-only work.
The loft is larger than most, with two generous dormer windows that open out as balconies. We placed the sauna directly in front of one of them so the view becomes part of every session, and tucked the shower out of sight behind the sauna. Two sides of the cabin are full-height glass, keeping the loft open and letting daylight from the balcony reach the benches.
The cabin is a solid insulated frame clad inside and out in Thermo Aspen, laid horizontally across walls, ceiling and benches. A 2+2 floating bench layout keeps the floor clear and allows both upright and reclined bathing, with concealed LED strips lighting the bench edges. Heat comes from a slimline HUUM CLIFF 6kW single-phase heater, controlled from the HUUM UKU Glass Wi-Fi touch pad so the sauna can be pre-heated from a phone.
Unlike our other Walton-on-Thames loft project, there is no steam room here, the heater is a single-phase HUUM rather than a 10.5kW Harvia Legend, all four benches float instead of a 2+1 layout, and the glass wraps two sides rather than just the front.
MATERIALS
The sauna interior is finished in Thermo Aspen, a premium heat-treated timber selected for its rich golden tone, smooth texture, and exceptional durability. Resistant to warping and wear, Thermo Aspen provides both beauty and longevity, making it ideal for intensive sauna use.
Every surface—including the walls, ceiling, and floating benches—was meticulously clad in horizontal Thermo Aspen, creating a harmonious and cohesive finish.
The linear arrangement adds structure and rhythm, while the natural colour of the timber softens the overall look, giving the interior a warm and inviting character.A full glass front ensures that the sauna feels bright and connected to its surroundings.

FACILITIES
The sauna features a 2+2 bench configuration with two lower and two higher floating benches. The floating design keeps the floor clear, simplifying maintenance while enhancing the visual openness of the space. The bench proportions allow for both reclining and upright seating, offering flexibility and comfort for users.

HEATER
The hybrid design features a HUUM CLIFF 6kW single-phase heater, known for its elegant slimline form and even heat distribution. Control is managed via the HUUM UKU Glass Wi-Fi Touch Pad, enabling convenient operation and pre-heating directly from a smartphone.

For another Walton-on-Thames loft project, this time with a steam room alongside the sauna, see our Loft Gym Sauna & Steam Room case study.
* Please note that these saunas are all designed as one offs and we can build to any available indoor and outdoor space, just call us or fill up the form at the bottom of the page.