Underfloor heating in a wet room: electric systems explained
Underfloor heating is close to standard on a Glasgow wet room, not because it's a luxury add-on but because it solves the cold-tile problem a wet room's larger exposed floor area creates.
Is underfloor heating worth it in a wet room?
Underfloor heating is worth it in most Glasgow wet rooms because it warms an exposed tiled floor that has no bath panel or cabinet to break it up, and it dries the floor faster between uses, which protects grout and silicone from the constant low-level dampness Scotland's climate causes.
Mat versus cable systems
A heating mat is a pre-spaced cable fixed to a mesh backing, quicker to install and suited to a regularly shaped floor. Loose cable, clipped directly to the floor, suits an irregular layout or areas around a drain former where a fixed mat pattern doesn't fit cleanly. Both sit beneath the tile bed, above the tanking membrane, wired through a floor sensor and thermostat.
Installation sequence
Underfloor heating is first-fix work: the cable or mat goes down after tanking is complete and cured, tested for continuity before a single tile is laid, then covered by the tile adhesive bed. Installing it before the membrane cures, or damaging it during tiling, are the two most common on-site mistakes.
Running costs
A wet room's underfloor heating typically runs on a timer covering morning and evening use rather than continuously, which keeps running costs modest — comparable to an extra hour or two of a bathroom's normal electrical load per day. A thermostat with a floor sensor prevents it running longer than needed to reach a set temperature.
How it protects the room, not just the comfort
A warm floor dries faster after each use, which reduces the time grout and silicone spend damp — the single biggest factor in how long they last before needing attention. This matters more in Glasgow's climate than in a drier part of the UK, where a floor dries on its own between uses regardless.