Furnishing a hotel spa means making a dozen binary decisions, almost all between an option that costs less today and one that lasts three times longer. The starting measurements are well known: relax loungers of 190-200 by 65-75 cm with a backrest tilted between 25 and 35 degrees, lockers 30-40 cm wide and 45-50 cm deep, benches with a seat at 40-45 cm, single treatment rooms of 8-9 m², light between 2200 and 2700 K, dimmable. What most specifications leave out is the verdict on each of these forks, and the criterion for judging them is a single one: in a spa, furniture is not destroyed by air humidity. It is destroyed by the water used to wash the floor and by a daily disinfection routine.
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The five zones of a spa and their humidity requirements
None of the choices that follow make sense if the spa is treated as a single room, because conditions change radically within a few metres. The reception area sits at normal humidity, 45-60%, and is furnished like a small lobby, though its floor and skirting still follow the rules of the wet zone because wet feet and towels pass through it constantly.
Changing rooms sit between 60 and 75%, with water on the floor. The true wet zone, showers, sauna, steam room and the wellness circuit, ranges from 80 to 100%, with sauna temperatures reaching 90-100 degrees and chlorine present where there is a hydromassage pool. The relaxation area and herbal tea corner sit at 50-65% and 24-28 degrees. Treatment rooms return to 45-55%, with strict requirements on hygiene, ergonomics and quiet.
The first step of a site survey is mapping these zones onto the floor plan and assigning each one a materials specification. Skip this and you buy a single batch of furniture, and within a season you are replacing a third of it.
Materials for the wet zone: compact HPL, stainless steel and stable timbers
This is the comparison that matters most financially, because it covers the bulk of the furniture’s square metreage. 18 mm melamine-faced chipboard has a particleboard core that swells from any unsealed point: a missing edge band on the back, a fitting hole, an on-site cut. In the wet zone it does not hold up in any finish; in changing rooms it can be used, but only with a raised plinth, 2 mm ABS edging on every side and no contact with the floor. Compact HPL at 10-13 mm has no core to protect: cut it and it is still HPL; disinfect it every day and it does not dull.
The verdict follows the zones. In the wet zone, and on anything that touches standing water, compact HPL, HDPE or polypropylene, with no alternative. In changing rooms, compact HPL on lockers and fronts. In the relaxation area and treatment rooms, melamine-faced chipboard is back in play, and that is where the cost difference is better spent elsewhere.
| Material | Wet zone | Changing rooms | Relax area and treatment rooms | Technical note |
|---|---|---|---|---|
| Compact HPL 10-13 mm | Yes | Yes | Yes | Homogeneous mass, washable with disinfectants |
| Polypropylene and HDPE | Yes | Yes | No, for aesthetic reasons | Unaffected by water and chlorine |
| AISI 316 stainless steel | Yes | Yes | Yes | Necessary where chlorine is present; AISI 304 pits |
| Teak, accoya, iroko | Yes | Yes | Yes | Stable in humidity, stay cool to the touch |
| 18 mm melamine-faced chipboard | No | With raised plinth | Yes | The core swells from any unsealed point |
| Porcelain stoneware or Dekton worktops | Yes | Yes | Yes | First choice for washbasin tops and treatment room worktops |
Two details remain non-negotiable in the wet zone. No furniture resting directly on the floor: it should either be wall-hung or set on adjustable stainless steel feet of at least 10-12 cm. And fittings entirely in stainless steel or nylon, screws and wall plugs included, because a nickel-plated hinge in a steam room oxidises within a season, and rust streaks on a light-coloured finish never come off again.
Lockers and benches for the changing room: materials and measurements
Changing rooms attract more criticism than any other zone and absorb the smallest share of the budget. Sizing starts from an operational figure: capacity is calculated on peak-hour concurrent use, roughly 25-40% of bed capacity, and should be revised upwards if the spa is open to external guests.
On materials, the comparison is three-way. Powder-coated metal is the cheapest and it works, but with chlorine in the air it pits at the edges within three or four seasons. Laminate on a water-resistant board with a stainless steel plinth is an acceptable middle ground, provided the edge banding stays intact. Compact HPL and HDPE last as long as the spa itself. The verdict: with a hydromassage pool or showers close to the changing room, go for compact HPL or HDPE; painted metal only makes sense in seasonal facilities or where a refit is already planned.
Measurements: width 30-40 cm, 40-45 if coats need to fit; depth 45-50 cm, the minimum for a hanger across the rail; full-height columns of 180-190 cm, or two tiers of 90-95. Inside, a stainless steel rail, a high shelf, a low hook and ventilation on the door or side panel, because a sealed locker holding a wet swimsuit produces odour within twenty-four hours.
The verdict on benches is blunt: slats. Upholstered benches absorb water from swimsuits and stay damp, and no covering changes that. Use teak or accoya slats spaced 8-12 mm apart so water can drain, a seat at 40-45 cm, a depth of 35-40 cm against the wall and 70-80 cm for central benches, with a shoe grille underneath. Around them, four fittings are often forgotten: hooks every 60-80 cm, a full-length mirror, a shelf with a hairdryer and socket at 100-110 cm, and a closed basket for used towels.
Locker locks: key, token or RFID
The lock matters more than the cabinet itself, because it is the component that breaks and the one that generates work for reception. A cylinder lock with a master key is cheap, but keys get lost and every loss means a replacement; a recoverable token reduces the problem where access is staffed; an electronic code or RFID lock paired with the room card removes key management altogether, at an indicative premium of 60 to 160 euros per locker.
The verdict depends on the access model, not on the star rating. Where guests enter the spa without going through a staff member, RFID pays for itself in the reception time it saves. Where access is by appointment, tokens or keys with a master remain rational, and the money saved is better spent on the locker material.
Relax loungers: technical mesh, upholstery or wood with a cushion
This is the zone guests remember the spa by, and the one where the wrong piece of furniture stands out immediately. The geometry does not change across the three families: length 190-200 cm, seat width 65-75 cm, seat height 38-42 cm, backrest between 25 and 35 degrees with a raised section under the knees. Below 20 degrees it is uncomfortable; above 40 it is hard to get up. With these values the lounger also works for a ninety-year-old guest, which is the real test.
What changes is the covering. Loungers in technical fabric on a stainless steel or aluminium frame, with polypropylene or PVC-polyester mesh, dry within minutes and can be washed with disinfectant. Upholstered loungers in contract faux leather offer superior comfort, but require a water-repellent faux leather resistant to alcohol-based disinfectants, with Martindale abrasion resistance above 50,000 cycles, and they must be approved as Class 1 IM. Loungers in stable timber with a removable cushion have an indestructible frame and shift the perishable part onto a separately washable and replaceable component.
The verdict: technical mesh close to showers and pool, where guests lie down wet; wood with a removable cushion in the dry relaxation area, the best compromise between durability and comfort; upholstery only in relaxation areas separated from water, and with a chemical-resistance specification written down in black and white. The figure that convinces clients: a lounger with a non-disinfectable covering costs 20-30% less and needs replacing in a third of the time.
There is no room for compromise on spacing: at least 60-70 cm between two adjacent loungers, ideally 80 cm without dividers, and one lounger per 4-6 m², because above that density the relaxation area starts to feel like a waiting room. For seating at the entrance, the same criteria apply as for hotel armchairs, with the same approval requirement.
Treatment rooms: minimum dimensions and fittings
The treatment room is a workspace, and anyone who furnishes it thinking only of atmosphere hands over an environment where the therapist works badly. A fifty-minute massage carried out in uncomfortable conditions is felt.
The reference size for a single room is 3.00 by 2.80 m, or 8-9 m², which guarantees 70-80 cm of clear space on three sides of the treatment bed. Below 7 m² the therapist cannot move around the bed, and the verdict is to do without a treatment room rather than fit in two undersized ones. A double room needs 14-16 m², a single with an internal shower 12-14.
Inside, you need a service unit with a washable worktop 100-140 cm long and 90-95 cm high, on legs, a washbasin with elbow controls, a trolley on swivel castors with a brake, a closed cabinet for products and clean linen, an adjustable therapist’s stool between 45 and 60 cm, and, for the guest, a coat hook, a stool and a shelf for personal items: these are the fittings most often left out, and without them clothes end up on the treatment bed. The treatment bed itself remains technical equipment to be chosen with the spa manager. On quiet, which in a treatment room is part of the treatment itself, the door matters more than the wall panels: it should close flush, with a perimeter seal and a draught-excluding threshold. In the relaxation area the problem is instead reverberation, which is reduced with water-resistant sound-absorbing panels on walls and ceiling and with soft-close dampers on every door.
Spa lighting: dimmable scenes for each zone
Anyone who installs a single switch for the whole spa saves a few hundred euros and makes areas with opposite needs unmanageable. The verdict is obvious but it still happens: separate dimmable scenes for each zone, under the therapist’s control.
| Zone | Kelvin | Illuminance | Note |
|---|---|---|---|
| Reception and changing rooms | 2700-3000 K | 150-300 lux | Frontal light on the mirror, CRI above 90 |
| Wet zone | 2200-2700 K | 50-100 lux | IP65 minimum, IP67 in showers |
| Relaxation area | 2200-2700 K | 30-80 lux, dimmable | No source in line with the loungers |
| Treatment room | 2700 K ambient, 3000-4000 K working light | 50 lux for the scene, 300-500 localised | Dual circuit |
Two mistakes recur: a spotlight in line with the relax lounger, which shines straight into the eyes of anyone lying down, and 4000 K in changing rooms, which makes skin look grey in front of the mirror. Indirect light hidden in wall recesses solves both.
What it costs to furnish a spa and where to focus the budget
A complete spa fit-out for a mid-sized property, including changing rooms, relaxation area, herbal tea corner and one or two treatment rooms, sits indicatively between 25,000 and 90,000 euros, excluding systems, saunas, pools and wall coverings. The variables that shift the total are the number of lockers and the level of the lounger coverings.
If the budget does not stretch to everything, the priority order is this: first the materials of the wet zone and changing rooms, which are irreversible; then the lounger coverings, which wear visibly; then the lighting design, which costs little and changes a great deal; and last the reception area finishes, the only zone where you can intervene later without dismantling anything.
Everything is decided at the site survey stage, not from a catalogue: the map of the five zones, the materials specifications and the locker count based on real concurrent use are the substance of good design work, and they are what make it possible to get a comparable quote. Where a spa is being added to an existing property, coordinating with the furniture in the common areas avoids a jarring shift in language between the wellness floor and the lobby.
Frequently asked questions about furnishing a hotel spa
Which materials really hold up in a spa’s wet zone?
Compact HPL at 10-13 mm, HDPE or polypropylene, AISI 316 stainless steel where chlorine is present in the air, and stable timbers such as teak and accoya. Furniture should be wall-hung or set on stainless steel feet of at least 10-12 cm, with stainless steel fittings. Melamine-faced chipboard is not acceptable in the wet zone in any finish.
How many lockers does a changing room need?
Roughly 25-40% of bed capacity, calculated on peak-hour concurrent use rather than the total number of beds. If the spa is open to external guests, the count needs to be reworked based on expected daily entries. It is worth leaving space in the design for a future extension, because adding a row later is almost always impossible.
Is an RFID lock linked to the room card worth it?
It is worth it where guests access the spa without going through a staff member, because it removes the management of lost keys and the reception work that follows. The premium is indicatively 60 to 160 euros per locker. Where access is staffed, tokens or keys with a master remain a rational choice.
What measurements should a relax lounger have?
Length 190-200 cm, seat width 65-75 cm, seat height 38-42 cm, and a backrest between 25 and 35 degrees with a raised section under the knees. Below 20 degrees the position is uncomfortable; above 40 it becomes hard to get up. The covering should be breathable technical fabric or disinfectable faux leather, on a stainless steel, aluminium or stable timber frame.
What happens if I build a treatment room of 6 m²?
The therapist cannot move around the bed and ends up working from the same side throughout, with consequences for treatment quality and for their own back. You need 70-80 cm of clear space on three sides, which brings a single treatment room to 8-9 m². Better to have one fewer treatment room, properly sized, than two where the work is done badly.
Does spa upholstery need to be certified?
Yes. Upholstered seating and loungers intended for the communal areas of a hospitality property require Class 1 IM approval covering the combination of fabric and padding, with documentation kept on file and available for inspection. This applies to relax loungers and waiting-area armchairs as well.
