Buildings Should Outlive Their Products
From discontinued roof tiles to smart devices that stop working when a server is switched off, buildings are often left carrying yesterday’s “latest solution”. Good conservation asks a simple question: can this be repaired, adapted or replaced without throwing everything else away?
A well-made building can stand for centuries. Yet many of the products fitted to buildings are designed around the commercial life of a manufacturer, a range or, increasingly, a piece of software. The building remains; the catalogue moves on.
This is not an argument against new technology. Nor is it a nostalgic claim that everything old was better. It is an argument for judging a product by its whole life, not merely by how it performs on installation day.
The Hive warning
Hive provides a particularly clear modern example. It is important to be accurate: Hive has not withdrawn its whole heating range. However, the company discontinued its smart security and leak-detection products and some older hubs. Its own product notice says the Hive View camera and HomeShield system stopped functioning after support ended on 1 August 2025. The Hive Leak Sensor had already lost its connected functions, and the first-generation Nano hub stopped connecting to Hive’s servers in 2023. Heating could still be operated as a standard wireless thermostat, but app control required a newer hub.
Nothing necessarily had to be physically worn out. The service on which the products depended had ended. Owners were advised to recycle the equipment.
That is the central problem with a cloud-dependent building product. Ownership of the object does not give the owner control of the service needed to make it work. A sound camera, sensor or controller can become useless because a server closes, an app is withdrawn or a company changes direction.
This has happened before.
Digital technology makes the problem more obvious, but it is not new. Buildings across Britain contain products and systems which were once widely promoted and are now difficult or impossible to replace like for like.
Proprietary heating systems
The Servowarm small-bore central-heating system is a good historic example. Launched in the 1960s, it combined a boiler, master radiator, thermostat and pump as a system. The Science Museum now holds a 1965 example in its collection. Such systems could be ingenious and compact, but a special component eventually becomes an old component for which knowledge and parts are scarce.
The modern equivalent is not the boiler itself, which will always have a finite life. It is a heating installation whose thermostats, actuators, control boards and communication system will work only with one manufacturer’s equipment. If a simple, standard control cannot be fitted later, the owner may be forced to replace much more than the failed part.
Discontinued roof tiles
Interlocking concrete roof tiles were installed on enormous numbers of post-war buildings. Individual profiles were protected by their particular shape, gauge and interlock. When a range ceased production, a perfectly serviceable roof could become difficult to patch after storm damage. The existence of specialist firms reproducing discontinued Redland, Stonewold, Crendon, Anchor and Essex profiles shows the scale of the problem.
A traditional plain tile or natural slate is not immortal, but it belongs to a broad family of materials. It can usually be sorted, salvaged, trimmed or sourced from more than one supplier. A unique interlocking profile depends on its mould continuing to exist.
Window and glazing systems
Traditional timber and metal windows were made from sections that a joiner or metalworker could understand. Rotten timber can be spliced, putty renewed, glass replaced and ironmongery repaired or copied. By contrast, many replacement windows, sealed glazing systems, shopfronts and curtain walls rely on a particular extrusion, gasket, drainage detail, hinge or locking strip. When that profile is discontinued, a small failure may lead to replacement of a whole sash, frame or elevation.
This is not a small environmental difference. Research reported by Historic England found that, over 25 years, replacing a damaged timber window with a new uPVC window and glazing could have a carbon footprint more than 49 times that of repairing the existing frame and retaining its glass.
Concrete gutters and complete house systems
Finlock concrete gutters were widely used on mid-twentieth-century housing but are rarely chosen now. Cast as part of the wall head, they show what happens when a short-lived function is made inseparable from long-lived fabric. When the lining, joints or falls fail, repair is far more disruptive than changing an independent length of gutter.
The same lesson applies to some post-war prefabricated house systems. A whole building might depend on a manufacturer-specific panel joint, fixing, coating or reinforcement detail. Once the original supply chain disappeared, maintenance became specialist work. A system sold as quick and complete can leave an equally complete problem when its weakest component reaches the end of its life.
Concealed plumbing and bathroom fittings
Concealed cisterns, shower valves, flush mechanisms and tap cartridges can give a clean finish, but many depend upon a particular internal component. Ceramic sanitaryware may last for generations while the hidden plastic mechanism becomes unobtainable. If access was not designed in, the repair can also mean opening a tiled wall.
Standard connections, accessible valves and replaceable washers are unglamorous virtues. They allow the visible room to remain while a modest working part is renewed.
Composite floors, panels and finishes
Click-together flooring, rainscreen panels, decorative laminates and composite boards are sold as complete ranges. Colours, textures and joint profiles change quickly. A damaged board in the middle of a floor or a broken panel on a façade may have no matching replacement only a few years after installation.
Natural timber boards, stone, brick and lime finishes also vary, but they can be repaired locally and their variation often improves with age. They do not usually require the next piece to have come from the same production run.
Integrated lighting and electrical controls
A conventional light fitting accepts a standard replaceable lamp. Many integrated LED fittings treat the light source, driver and casing as one unit. When the driver fails, the whole fitting may be discarded. In a larger building, one discontinued fitting can undermine a carefully planned scheme or force many sound fittings to be changed for the sake of consistency.
The risk is greater with building-management, access-control, alarm and audio systems. Proprietary software, licences, encrypted devices and closed communication protocols can tie the building to one supplier. If the installer or manufacturer withdraws support, even another competent specialist may be unable to maintain the installation.
Obsolete does not always mean unrepairable
There is an important contrast. Many genuinely old materials are no longer ordinary stock items, yet they have not become useless. Handmade brick, lime mortar, historic glass, traditional roofing details and timber mouldings can be repaired or reproduced because their materials and construction can be examined and understood. Reclaimed material can often be used. A craftsperson does not need permission from the original maker or a connection to its server.
Some discontinued proprietary products can also be reproduced: the specialist market for obsolete roof tiles is proof of that. But this is rescue after the event. It should not be the basis of a new specification.
Questions worth asking before anything is installed
Clients, designers and contractors do not always control the original specification. A contractor must ultimately carry out the instructed work. Even so, everyone involved can ask sensible questions and make the consequences clear:
Can ordinary tools be used to inspect and repair it?
Can the wearing part be changed without removing the sound parts around it?
Are fixings accessible, or is the product bonded and sealed beyond dismantling?
Are connections, dimensions and communication protocols standard?
Can an equivalent component be bought from another maker?
Will essential functions continue without an app, subscription or internet connection?
For how long are spare parts, security updates and technical information promised?
What happens if the manufacturer disappears?
Can the material be reused, or separated for proper recycling?
UK product security rules now require manufacturers of relevant connectable consumer products to publish a defined minimum period for security updates. That is useful information, but a stated support period should not be confused with the expected life of a building. A five , ten or even fifteen year promise is brief beside a roof, a heating distribution system or a historic interior.
A conservation principle for every building
Historic buildings teach us that longevity is not achieved by avoiding change. They survive because they can be understood, maintained and altered in small parts. A slate can be replaced without replacing a roof. A length of timber can be spliced without discarding a window. Lime mortar can be renewed without sacrificing the masonry.
Historic England’s research makes the environmental case as well as the practical one: the longer buildings and their components remain in useful service, the less carbon is spent, while regular maintenance and prompt local repair improve performance and avoid larger interventions.
The lesson is simple. Do not judge a building product only by what it can do today. Ask what happens when it fails, when its maker changes course, and when the person repairing it twenty years from now opens the wall. Choose systems that can be understood. Keep working parts accessible. Prefer common sizes, open standards and replaceable components. Retain what remains serviceable.
A building should never become obsolete because one proprietary part does.
Research sources
Hive: Product News and discontinued products
Historic England: The Role of Maintenance and Repair in a Low Carbon Future
Science Museum Group: Servowarm small-bore central-heating system
Repco Roof Tiles: Reproductions of discontinued roof tiles
UK legislation: Product Security and Telecommunications Infrastructure Regulations 2023
SPAB: The Repair of Wood Windows
