On this page
- Neither a catalogue house nor a build that drags on for years
- Hardly anyone knows what is inside their walls until something goes wrong
- Why this wall
- Three layers, from the inside out
- How it goes up
- Two centimetres
- It has one real drawback
- Have you ever walked into a wine cellar in August?
- What you notice when you live in it
- Two things you only notice once you live there
- The first bill is not the electricity bill: it is the air conditioning
- 75% less energy to heat and cool your home
- What we check before it is too late
- We don’t ask you to take our word for it
- Half the time of a traditional build
- What happens when something goes wrong
What is inside the wall of an Everhome house?
Reinforced concrete, with insulation bonded to both faces: thicker on the outside than on the inside. The wall is structure, envelope and insulation at once, and the insulation is continuous, with no joints where elements meet. Inside it is closed with plasterboard, ready to paint.
Neither a catalogue house nor a build that drags on for years
| Catalogue house | Traditional build | Everhome | |
|---|---|---|---|
| You choose it | from a catalogue | from scratch | to your measure |
| It arrives | by lorry, with a crane | material by material | it is built there |
| You are limited by | the module and the access | time | none of that |
| It takes | months of waiting | years | six months |
Catalogue house
Traditional build
Everhome
The precision of the industrialised. The freedom to build what you want. And without depending on whether a twenty-metre lorry can reach your plot.
10 cm outer insulation
15 cm reinforced concrete
5 cm inner insulation
Hardly anyone knows what is inside their walls until something goes wrong.
We show you before we start.
The thickness of the insulation and of the concrete is adapted to each project and its structural calculation.
Why this wall
The insulation is not fitted: it is the formwork itself.
On a normal site the insulation goes on afterwards, in layers, by hand, and everything is decided at the junctions: an open joint, a piece that does not quite reach, a thermal bridge where nobody is looking. Here that moment does not exist. The insulation is the mould the concrete is poured into, inside and out, continuous from top to bottom. It cannot be badly fitted because it is not fitted: it is already there.
Inside there is reinforced concrete.
The same as always, the one in the buildings that are still standing. There is no wall more solid, or more predictable: it is calculated, reinforced and filled. And it is what is inside the walls of the industrialised house brands sold as premium, even if they do not always say so on the front page.
And it stays sealed.
A solid, continuous wall does not have the paths air slips through in traditional masonry: joints, junctions, blind boxes, badly finished service penetrations. Fewer paths, fewer ways in for what you do not want — air, noise, dust and damp.
Three layers, from the inside out
Inner insulation
On the inside, bonded plasterboard: the wall is ready to paint.
Reinforced concrete
A double steel mesh and concrete poured in one piece. This is what holds the house up.
Outer insulation
It wraps the house on the outside, with no breaks at the junctions. On top, mesh and one-coat render.
The insulation is both the formwork and the coat. What holds the house up is the concrete.
How it goes up
1
On the foundations
The blocks are dry-stacked on the slab, with the steel starter bars already in place.
2
Up to the height of the house
Alignment props so the wall is perfectly plumb, and window openings with their lintels.
3
Pouring the concrete
The concrete goes in from the top and fills the wall in one piece.
4
On the outside
Mesh and one-coat render applied directly onto the block.
5
On the inside
Plasterboard bonded onto the insulation: a wall ready to paint.
Two centimetres
The regulations allow a brick wall to go out of plumb by up to two centimetres per storey. And that is not a badly built wall: it is what the regulations accept.
Our blocks leave the factory with a tolerance of two millimetres.
That is the block, not the finished wall: that is why the plumb is checked on site, course by course, before the concrete goes in.
Execution tolerances for masonry in the Spanish Building Code (CTE, DB SE-F).
It has one real drawback.
Once the concrete is poured, making a new opening is not a morning’s job: reinforced concrete has to be cut and the lintel has to be engineered.
To be fair: that is only easy in a house with columns and floor slabs, where the window goes into a partition wall that carries nothing. In any house with load-bearing walls it isn’t simple either, because the wall holds the house up and the opening needs a reinforced lintel. Here, on top of that, the wall is concrete.
And that is exactly why the plans are finalised before we start, taking whatever time is needed. What a traditional build decides along the way, we decide beforehand.
Have you ever walked into a wine cellar in August?
Outside it is hot. Inside it is cool, without air conditioning. That is not insulation: it is mass.
That is why the thick insulation goes on the outside and the concrete stays inside the house. It absorbs the heat of the day slowly and releases it at night, so you don’t feel the peaks.
What you notice when you live in it
60 dB
Up to 60 dB less street noise.
90 min
How long a 15 cm reinforced concrete wall withstands a fire.
Technical details
There is no timber or any organic material inside. Graphite-enhanced insulation, declared thermal conductivity of 0.029 W/m·K. Complete façade (10 + 15 + 5 with one-coat render and plasterboard, 32.8 cm): transmittance of 0.186 W/m²K. The insulation is a recyclable material. The fire resistance is the one the regulations assign to a reinforced concrete wall of that thickness.
Two things you only notice once you live there.
A block wall needs eleven or twelve centimetres of insulation on the inside, all the way round. That comes out of your living room. Here the insulation goes on the outside: the metres stay inside.
No cables chased into the wall. Services run behind the plasterboard. The day you want a new socket or to change something, nobody has to chisel into the wall.
And a third one you never see: the insulation is also continuous where the wall meets the floor slab, which is where heat escapes in houses insulated from the inside.
The first bill is not the electricity bill: it is the air conditioning
In a large house in Castalla, designed by a colleague. The winter of the big snowfall, the owner said they had not noticed a thing.
When a house insulates poorly, you make up for it with machinery: more power, more units, more installation. That is paid on day one, with the installer’s quote, not twenty years from now.
Every house is calculated individually.
75% less energy to heat and cool your home.*
Compared with the same house built the way houses were built thirty years ago: in that house, around €650 a year. Compared with a new house that only just meets the minimum standard: 53% less energy, in that house around €240 a year.
The Spanish building code (CTE) allows façades of up to 0.56 W/m²K in this area. Ours is 0.186. And there is something that doesn’t show up in any figure: the fifteen centimetres of concrete stay inside the house, absorb the heat of the day and release it at night, so the system switches on less often.
Take your last electricity bill and look at what it costs you to heat and cool your home over a year. That is the item this wall works on.
We did the maths with today’s electricity price. You already know which way it is heading.
What we check before it is too late
Of every ten construction disputes that end up in the Spanish courts, almost three are damp and water getting in. And the most repeated cause is not a bad material: it is work left unfinished on site.
So we do not wait for it to show. Eight tests and checks: five we do because we want to — watertightness of roofs, façades, terraces and services, and thermal imaging — and three are required by code and signed off by an independent laboratory.
And everything that gets covered up is checked before it is covered: services before the plasterboard, reinforcement before the concrete, waterproofing before the finish goes over it. It is recorded, with its date and its photo.
Defect data: Fundación MUSAAT and the University of Alcalá, based on 34,873 cases with a final judgment (2008-2017).
We don’t ask you to take our word for it
When we finish, we carry out a thermal imaging survey: if there is a cold spot, it shows in the photo. And the site is open for you to bring your own surveyor whenever you like.
Half the time of a traditional build.**
One team, not four trades
The same team raises the wall, reinforces it and pours it. Nobody waits for the one before to finish.
Three jobs in one
The wall is structure, envelope and insulation at once.
The floor slab arrives made
Where the crane can get in, it goes up in a day.
Nobody rushes. There are fewer steps.
And fewer places where something can go wrong.
The faults in a build are almost never in the middle of a wall. They are at the junctions: where one trade’s work ends and the next one’s begins. Fewer trades means fewer junctions, less waiting and fewer “that wasn’t my job”.
Parts that fit together. Fewer joints made by hand, less reliance on whether that day’s tradesman is on form.
We can keep a close eye on every part of the job. With fewer trades to coordinate, control is not spread thin: each stage is checked before moving on to the next.
That is why we sign the completion date with a penalty clause. It does not depend on six different trades turning up in the same week.
Six months
A house built to measure in Spain is measured in years. Ours is built in six months: five are the house, and the first is the foundations, the only part that does not depend on us but on your ground. That is why the geotechnical survey is done before the completion date is signed, not after.
What we sign, whatever the system
The price is fixed in the contract, with its clause. And the completion date carries a penalty if we do not meet it. These are not website phrases: they are the paper you sign before we start, with what is included and what is not written next to it. If you want to see it before deciding anything, we show you the contract at the first meeting, with no commitment and without having signed anything.
And what that is worth is not only in the budget. Every extra month of building is a month paying for two things: where you live now and the house that is not yours yet.
The five or six months are the building work. The licence comes first and depends on the town hall, not on us: you will know that from day one, and we will tell you how long it usually takes in your municipality.
What happens when something goes wrong
Something will go wrong
A house has hundreds of parts, and one of them plays up in the first year: a tap that drips, a door that catches, a blind that jams.
You know who to call
The same number as during the build. Not a customer service line: the people who built it, who still work in the same town.
Nobody argues about who pays
If it is down to us, we put it right. That is in the contract, not on this page.
Here there is no argument: it gets fixed. And a year after you move in we come back, whatever we find, even if you have not called us.
* Our own calculation for a model home of 141 m² built on one floor, with our building envelope (façade 0.186 W/m²K, roof 0.25, ground slab 0.35, PVC window frames with low-emissivity double glazing and argon-filled cavity) and a mid-range heat pump (SCOP 4.6 / SEER 6.1). Set points of 21 °C in winter and 25 °C in summer, degree-days for Alicante (IDAE, Ciudad Jardín weather station) and electricity at €0.2669/kWh (Eurostat, second half of 2025, taxes included). It is compared with the same house meeting the minimum of the Spanish building code (CTE) and with one built between 1980 and 2000 (default values of the official certification software). The calculation covers heating and cooling; it does not include hot water, cooking or appliances, nor the effect of thermal bridges and airtightness, which work in this system’s favour. The actual consumption of each home is set by its energy performance certificate.
** Compared with a house with a concrete frame, brick walls and insulation fitted in stages, based on the experience of our own builds. The build time of your house depends on its size, its design and the finishes you choose, and it is written into the contract, with a penalty if we run late. It does not include the time taken for the licence or by the utility companies, which does not depend on us.
