Underfloor heating in Glasgow costs £75 to £120 per square metre for electric systems and £120 to £220 per square metre for wet systems fitted as part of a renovation, with a whole-house wet installation in a new build or full refurbishment typically landing between £6,000 and £14,000. Electric suits single rooms and retrofits, particularly bathrooms. Wet systems suit whole floors, new builds and extensions, and are far cheaper to run.
Choosing between them is really a question about floor build-up, room size and running cost. Here is how the two compare and which one fits a Glasgow property.
Wet vs Electric: The Short Version
| Wet (hydronic) | Electric | |
|---|---|---|
| How it works | Warm water through pipe loops in the floor | Heating mat or cable under the floor finish |
| Install cost per m² | £120 – £220 | £75 – £120 |
| Running cost | Low — runs off the boiler or heat pump | High — electricity at full rate |
| Floor build-up | 15–75mm depending on system | 3–10mm |
| Best for | Whole floors, new builds, extensions | Single rooms, bathrooms, retrofits |
| Response time | Slow and steady | Fast warm-up |
| Typical lifespan | 50+ years for the pipework | 20–30 years |
Wet Underfloor Heating
A wet system circulates warm water through pipe loops laid across the floor, controlled by a manifold with a mixing valve that drops boiler flow temperature to something the floor can handle — usually 35 to 45°C. Because it runs at low temperature over a large surface, it is efficient, and it pairs particularly well with a heat pump. Connected to your existing central heating, it can share the same boiler as radiators elsewhere in the house.
Where it works
- Extensions and new builds, where the floor is being formed anyway.
- Ground floors on a concrete slab, screeded over the pipe loops.
- Full renovations where floors are already up.
- Open-plan spaces where radiators would eat wall space.
Where it struggles
- Retrofits into occupied rooms with fixed floor and door heights even a low-profile system adds 15 to 20mm.
- Poorly insulated floors, where the heat goes downwards.
- Small rooms, where the manifold and controls cost more than the benefit.
Electric Underfloor Heating
Electric systems are a mat or loose cable laid in tile adhesive or a levelling compound. The build-up is minimal, installation is quick, and warm-up is fast. The trade-off is running cost you are paying electricity rates for every unit of heat, so it makes sense as comfort heating in a bathroom or kitchen rather than as a primary heat source for a whole house.
It pairs naturally with a bathroom renovation or a wet room, where the floor is coming up regardless and the room is small enough that running cost stays modest.
Underfloor Heating Costs in Glasgow (2026)
| Job | Typical Glasgow price (2026) |
|---|---|
| Electric mat, bathroom (4–6m²) | £450 – £900 |
| Electric, kitchen or living room (15–25m²) | £1,200 – £2,600 |
| Wet system, single room in a renovation | £1,500 – £3,200 |
| Wet system, ground floor of a house | £4,500 – £9,000 |
| Whole-house wet system (new build) | £6,000 – £14,000 |
| Manifold, mixing valve and controls | £700 – £1,600 |
| Smart zone thermostat, per zone | £120 – £280 |
Insulation underneath is not an optional extra. Laying either system over an uninsulated floor sends a large share of the heat into the ground, and no amount of thermostat adjustment fixes it. The Energy Saving Trust covers the low-temperature heating case in more detail, and the Scottish Government publishes current grant eligibility for heat pump and insulation work.
Glasgow-Specific Considerations
Two property types dominate here, and they point in opposite directions.
Tenement and sandstone flats mostly have suspended timber floors over a ventilated void. Wet underfloor heating is possible using low-profile plates between joists, but it needs insulation below the pipes to stop heating the void, and the floor build-up affects door heights. In practice, electric mats in the bathroom plus radiators elsewhere is the usual sensible answer.
New builds and extensions across East Kilbride, Paisley and Hamilton have insulated concrete slabs, which is exactly what a wet system wants. If you are building an extension anywhere in the city, putting the loops in while the slab is open costs a fraction of retrofitting later.
Floor finish matters as well. Tile and stone conduct heat best, engineered wood is fine within the manufacturer’s temperature limits, and thick carpet with a heavy underlay largely defeats the point.
Why Choose a Gas Safe Certified Engineer?
A wet system ties directly into the boiler and the heating circuit, and it has to be commissioned, balanced and pressure tested as part of the whole system. That is work for a registered Gas Safe engineer, not a flooring contractor. Sizing matters too: adding underfloor heating without checking the appliance can leave the boiler installation undersized for the new load. We assess the whole system first. Check any card on the Gas Safe Register, and see our wider underfloor heating and plumbing and heating services pages.
You may also like our guides on wet underfloor heating and smart thermostats for underfloor heating.
Frequently Asked Questions
How much does underfloor heating cost in Glasgow?
£75 to £120 per square metre for electric and £120 to £220 for wet systems. A bathroom electric mat is typically £450 to £900; a ground floor wet system £4,500 to £9,000.
Is underfloor heating cheaper to run than radiators?
A wet system usually is, because it runs at a lower flow temperature over a larger surface especially with a heat pump. Electric underfloor heating costs more to run than gas radiators and suits small rooms rather than whole houses.
Can I retrofit it into a tenement flat?
Electric mats in a bathroom or kitchen, yes, readily. A wet system over suspended timber is possible with low-profile plates but needs insulation below and affects floor and door heights.
Can it be my only heating?
In a well-insulated property, yes. In an older sandstone building with single glazing and limited insulation, it usually works best alongside radiators.
What floor coverings work with it?
Tile and stone are best. Engineered wood and LVT are fine within the manufacturer’s temperature limits. Thick carpet with heavy underlay insulates the floor from the room and undermines the system.
How long does installation take?
A bathroom electric mat is typically a day alongside the tiling. A ground floor wet system is usually three to five days plus screed drying time before the floor finish goes down.
Ready to Get Started?
Precision Renovators are Gas Safe certified heating engineers installing wet and electric underfloor heating across Glasgow and the surrounding towns. We assess the floor build-up and the existing system before recommending anything, and quote a fixed written price. Browse our services or see our projects.
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