The part we drew, and the part we left open

There is a moment on almost every project where the catalogue runs out. Usually it is small. A junction that no printed detail covers, a dimension a chart does not reach, a condition the tested specimen never faced. Most of the time the answer is to adapt something that exists.

Occasionally the answer is that nothing exists.

Linea Slimline SF77 came out of one of those moments. The requirement was a shutter and screen that could carry weight, move reliably, and survive weather, without the visual bulk that normally comes with all three. Nothing available did it at the proportion the architecture wanted. So we drew the carrier.

Carrier and skin

The distinction matters more than the name.

A carrier is the part that does the work — the structure, the movement, the fixings, the tolerances, the way load passes into the building. It is the part that has to be right, because it is the part that fails.

A skin is what you see. It is the material that faces the world, and it is largely an aesthetic and environmental decision rather than a structural one.

Most facade elements bind the two together. Change the appearance and you change the whole assembly, which means every new finish is a new development exercise. Slimline separates them. The carrier is fixed, resolved and proven. The skin is open.

What is built, and what is not

We are precise about this because the distinction is easy to blur and expensive to get wrong.

Slimline has been built twice, in timber, using Geolam. Two projects, both complete, both standing. That is the built proof, and it is the only built proof.

The carrier is also engineered to take other skins. Gammastone, in bar form, is the nearest alternative — a mineral surface with a different weight, a different weathering behaviour and a different cost. Aluminium is a third possibility. Neither has yet been built on a project.

We could write that Slimline is available in three finishes. It would be true in the sense that marketing copy is true, and misleading in every sense that matters to someone specifying it. Configurable is not the same as delivered. When the first Gammastone installation is complete, we will say so, and it will mean something, because we did not say it early.

Why author anything at all

There is a reasonable argument that a facade contractor should never develop its own profile. European system houses spend years and considerable money on testing, tooling and certification. Competing with that is not sensible, and we do not.

But there is a difference between developing a range and resolving a part. The European houses answer the general case extremely well. What they cannot answer is the specific case that appears once, on one building, because one architect drew something that had not been drawn before.

That gap is not a market. It is a responsibility. If the intent is right and no existing part serves it, the choices are to change the intent or to make the part. We have done both, and we know which one the architect remembers.

Slimline is what happens when we choose the second. It is not a range and it is not for sale as one. It is a carrier we resolved once, properly, and can now offer to the next project that needs it — with the skin still an open question, which is exactly how a good detail should arrive.