- Postcode districts
- CF62, CF63
- Nearby
- Penarth, Cardiff and Llantwit Major
- Guide price
- £650–£2,300
- Typical time on site
- 1–2 working days (added to a fit)
- Water
- Moderately hard across most of South Glamorgan
- Survey
- Free, at your home
What does bathroom underfloor heating cost in Barry?
Guide price in Barry: £650–£2,300 including VAT, depending on the room and what you choose. Prices in Wales run at about 7% below the national guide, mainly because of labour rates. The figure depends on the size of the room, whether anything moves, and the products you pick.
Electric mat
- Mat under the tiles
Electric, larger room
- Programmable smart thermostat
Wet system
- Screed or low-profile boards
Guide prices for Barry including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Barry
We cover every part of Barry, including CF62 and CF63, and nearby Penarth (5.5 miles) and Cardiff (7.1 miles).
In Barry, as anywhere, the age of the house decides a lot: pipe sizes, floor construction and where the soil stack runs. If your Barry bathroom has a cold tiled floor and no room for a bigger radiator, an electric mat under new tiles is the simplest answer. Whether your Barry bathroom is a small en-suite or a large main bathroom, the mat is sized to the open floor, not the whole room.
Water across much of South Glamorgan is moderately hard. Mid-tone grout and matt tiles hide the odd water mark better than dark grout and high gloss. Hardness varies street by street, so check the figure for your postcode with your water supplier.
What the job includes
- Bringing the system up to temperature gradually once the adhesive and grout have cured
- Resistance and insulation tests on the mat before, during and after tiling, with the readings recorded
- For wet systems, pipes in low-profile boards or screed connected to a manifold or single-zone kit, with any boiler work done by a Gas Safe registered engineer
- A floor sensor set between the heating runs and wired back to the thermostat
Decisions to make first
Mat or loose cable
Mats are quickest on square, open floors. Loose cable is easier to route around awkward shapes, pipe boxing and a curved shower area.
Thermostat
A simple dial thermostat, a programmable one with set times, or a smart thermostat you can control from your phone.
Rules that apply in Wales
In Wales, the Welsh Part P also makes a new underfloor heating circuit notifiable, and it covers more bathroom electrical work than the English version. A registered electrician handles the notification.

