Three Kenyas, three different buildings

Highland Nairobi

At 1,795 metres the air is thin, the nights are cool, the humidity is moderate and there is no salt. That produces the most forgiving specification in the country.

Heater sized up for altitude. A2 fixings are adequate. A run-on timer is sufficient ventilation for most rooms. Service half-yearly. Dust from murram roads is the only real nuisance, and washable pre-filters handle it.

This is also where cold water is cheapest, so a Nairobi installation often delivers more for less money than the same brief anywhere else in Kenya.

The coast

Sea level, hot, humid and salty every day of the year. The specification changes in five places at once.

A4 stainless throughout, including fixings nobody sees. Sealed and filtered plant enclosures. Deeper drained cavities behind cladding, with end grain sealed before assembly. Humidistat-controlled extract, because the room will not dry on its own. And a chiller a size up from the highland figure.

Service quarterly, with a corrosion inspection at every visit. Salt failures start at the smallest metal parts and they are visible from two metres away if somebody is asked to look. The full list is on our Kenyan coast builds page.

The bush

Dust rather than salt, heat rather than humidity, and usually off-grid power. A different set of problems again.

Washable pre-filters on everything with a fan, sealed plant housings, shaded siting with real clearance, and a three-month service interval in the dry season. Heater and chiller sequenced in the controls so they never start together on a generator. And the plunge sized to the water budget, because most camps truck or borehole their water.

Laikipia adds altitude on top of all of that, which is the one combination that needs every correction at once. We cover the camp side in detail on the safari lodge spa page.

The parts that never change

Some things are identical in Karen, Diani and the Mara. The heater arithmetic — volume, elevation, glass — rounded up to a heater that exists. An insulation standard that pays back in every climate, for different reasons in each. Wet-room basics: membrane or wedi board, a fall to the drain, a pitched ceiling and plant a technician can reach.

And the routine: stones turned, generator descaled, condenser cleaned. Location changes how often, never whether.

Water, which varies more than anything

Nairobi mains, a Naivasha borehole, a coastal supply and a bush borehole are four different chemistries. Hardness sets the steam generator's descaling interval; dissolved solids set how often its tank is flushed; some Rift Valley boreholes carry fluoride at levels worth knowing about.

We test at the property before specifying a generator. It takes ten minutes and it is the difference between a ten-year item and a two-year one — see how it feeds into a Kenyan steam room specification.

Moving a cabin between the three

Owners do move — a Nairobi family relocating to Kilifi, a lodge closing one camp and opening another — and sometimes the sauna goes with them. A cabin on a bolted frame can be dismantled and rebuilt, but it arrives in its new climate needing different parts.

Heading to the coast it needs stainless A4 hardware, a deeper ventilated cavity and humidistat extract; heading inland it needs its heater re-rated for elevation. We look at the cabin before promising the move, and say so plainly when a new cabin would serve better.

How to spot a one-size quote

A supplier who offers the identical cabin, heater and chiller for Karen, Diani and a Mara camp has quoted the right building for one place at most. The fixes for the other two are cheap at the drawing stage and expensive afterwards.

Getting the regional details right usually adds only a few per cent to the project. Skipping them tends to cost a second cabin.

Six questions to put to any supplier

Which fixing grade for my location? What cavity sits behind the cladding? Timer or humidistat for the extract? What altitude factor did you use, and may I see the sum? How often will you service it, and what does a visit include? Did you test my water before choosing the steam generator?

If the answers do not change when you change the address, you are looking at a catalogue page, not a design.

Why we build the same way in all three anyway

It is worth being clear about what does not change, because it would be easy to read this article as saying that coastal work is simply better built.

Every cabin we make, wherever it goes, gets the same insulation standard, the same vapour barrier discipline, the same bench detailing, the same heater arithmetic and the same commissioning routine with a thermometer and a stopwatch.

What changes is the interface with the environment: metal grade, cavity depth, ventilation control, plant enclosure, chiller size and service interval. The box is the same box. The armour around it is not.

That distinction matters when you are comparing suppliers, because a builder who changes the box for different markets is usually cutting something, and a builder who changes nothing at all has not thought about the coast.

The fourth Kenya: the lake

There is a fourth case that does not fit neatly into highland, coast or bush, and it is Kisumu and the lake basin.

At around 1,130 metres it is well below Nairobi, so the altitude correction is small. But it is hot, low-lying and humid from the lake, which puts its cooling requirement closer to a coastal figure than a highland one.

What it does not have is salt, so fixings and plant enclosures can be specified inland-style. The result is an unusual combination: coastal cooling, highland metalwork, and ventilation that has to be as good as anything we do in Mombasa.

We mention it because it is the specification most often got wrong by suppliers working from a two-way highland-or-coast mental model. Naivasha sits in a similar gap, with lake humidity, valley dust and borehole water chemistry all at once.

What to do if you are unsure which Kenya you are in

Take three readings over a week in the season you expect to use the room most: air temperature at dawn, air temperature at three in the afternoon, and relative humidity at dusk.

Cool dawn and moderate humidity means you are in the highland case and cold water will be cheap. Warm dawn means you are in a coastal-style cooling case regardless of how far you are from the sea. High dusk humidity means you need a humidistat rather than a timer.

Send us those three numbers with your enquiry and we can size most of the installation before we visit. It is a better basis for a quote than the name of the town.