Underfloor Heating During Renovation: What to Choose

Underfloor heating during apartment renovation in Moscow is not a generic add-on — it is a zone decision: where barefoot comfort matters, where wet floors must dry, and where radiators are enough. In 2026, electric loops under tile often quote 3,500–6,500 RUB/m² installed with thermostat; hydronic in full screed replacement runs 5,000–8,000 RUB/m² and up with manifold. Main risks: cover overheating, floor height, and wet-zone errors.

Profmaster has executed turnkey apartment renovation in Moscow and the region since 2006. Below: hydronic vs electric, where each fits, how to budget and schedule with screed. Bathroom: Bathroom Renovation Cost. Kitchen: Kitchen Renovation Cost. Balcony: Balcony and Loggia Renovation.

Hydronic vs electric: comparison

In short: in typical Moscow flat renovation, electric often wins for targeted zones; hydronic when full screed and manifold are planned.

Parameter	Electric	Hydronic
Install	Faster, fewer layers	Needs screed, manifold
Zones	Bathroom, kitchen, balcony, local rooms	Dry rooms, large areas
Running cost	Metered electricity	Often tied to building heat — harder to track
Repair	Easier local fix	Harder — pipe access
Floor height	Mat low; cable + screed higher	Higher — pipes and screed
Wet zones	Primary option	Rare

Whole-flat stages: Renovation in a New Building.

Where underfloor heat pays off

In short: not every room by default — where radiators are weak or floor comfort matters.

High priority

• bathroom and shower — comfort and drying;
• kitchen at sink and work zone;
• entry — wet shoes in winter;
• insulated loggia — see balcony article;
• kids room with floor play — with temperature cap.

Low priority

• bedroom with strong radiator and rug;
• zones under built-in furniture;
• flats with strict floor height limit.

Electric systems: types and coverings

In short: mat for even zones under tile; cable for complex geometry and thicker screed.

Type	Under	Pros	Cons
Heating mat	Tile, porcelain	Fast install	Fixed spacing
Cable	Tile, screed, complex shapes	Flexible layout	Longer, taller build
IR film	Laminate, LVT per spec	Thin	Not for wet zones

Laminate and SPC

Check max surface temperature on packaging. Use thermostat capped at 27–28 °C and cable type approved by flooring maker.

Hydronic loops in an apartment

In short: possible with capital screed, but needs heat-loss math and heating scheme.

Conditions:

• separate manifold circuit or boiler feed (houses);
• in multifamily central heat — approval and technical feasibility;
• pipes photographed before screed pour;
• perimeter expansion strip;
• do not cross electric routes without rules.

In white-box new builds, manifold sometimes exists — confirm at design stage.

Wet zones: bathroom and kitchen

In short: waterproofing → heat → tile; RCD mandatory.

Bathroom

Sequence:

1. Floor waterproofing.
2. Cable/mat with no-heat zones under bath.
3. Grounding and dedicated line.
4. Sensor in conduit (replaceable).
5. Tile with flexible grout.

Detail: bathroom renovation cost.

Kitchen

• heat at sink and counter;
• no heat under built-in fridge and oven;
• dedicated panel group;
• level junction with hallway heat — one level plan.

Electrics and load

In short: underfloor heat is not a socket circuit — calculate watts.

Loop area	Power guide	Panel
4 m²	400–600 W	Dedicated line
8 m²	800–1200 W	RCD
12 m²	1200–1800 W	Check main feed

Before install:

• verify free apartment capacity;
• specify programmable thermostat;
• do not share line with general outlets.

Floor height and junctions

In short: plan before doors, screed, neighboring rooms.

Typical build-up:

• mat + tile: 15–25 mm;
• cable + 30 mm screed + tile: 45–60 mm;
• hydronic + screed: 50–80 mm.

Junctions:

• threshold or smooth transition between rooms;
• separate loops by zone;
• expansion breaks on large areas.

Budget benchmarks 2026

In short: per-m² price drops on larger areas; thermostats and electrics extra.

Solution	Price per m² (install + material)	Extra
Mat under tile	3,500–5,500 RUB	Thermostat 4,000–12,000 RUB
Cable + screed	4,500–7,000 RUB	Screed in estimate
Hydronic loop	5,000–8,000 RUB	Manifold, pump, mixing
Balcony 4 m²	25,000–55,000 RUB total	Insulation separate

Flat context: capital calculator, comfort calculator, apartment renovation cost.

Installation and acceptance

In short: photo cable before screed, resistance test, heat test before tile.

Steps:

1. Layout plan with no-heat zones.
2. Substrate prep.
3. Cable/mat fix.
4. Sensor in conduit.
5. Multimeter check, act.
6. Screed or tile.
7. Thermostat wiring.
8. First run with surface temperature check.

Acceptance: Apartment Renovation Acceptance Checklist.

Common mistakes

Mistake	Consequence	Fix
Heat under cabinet	Overheat, fire risk	Exclude on plan
No RCD	Shock risk	Dedicated line
Cable cut in screed	Dead loop	Act before pour
Sensor not in conduit	No replacement	Install per manual
High temp under laminate	Buckling	Thermostat cap
Hydronic without calc	Cold floor	Heat-loss design

Checklist before order

Design

• Heated and non-heated zones defined
• Type chosen: mat, cable, or hydronic
• Floor height and doors checked
• Room junctions agreed

Electrics

• Load and lines calculated
• RCD and thermostats specified
• No uncontrolled water crossings

Estimate

• Price per m² and total loop area
• Thermostats per zone
• Screed and bathroom waterproofing
• Concealed-work act before close

Questions to ask the contractor

• Which system do you recommend for our bathroom/kitchen and why?
• What loop wattage and is the panel sufficient?
• Where does the sensor run and can it be replaced?
• Which zones are excluded from heating?
• How is cable tested before screed — will there be an act?
• What max surface temperature for our flooring?
• How is junction with neighboring room solved?
• Is thermostat in estimate or extra?
• How does this align with bathroom waterproofing?
• What warranty on heating electrical work?

Thermostats and control

In short: without a thermostat, underfloor heat becomes overheating and overspend.

Thermostat type	Features	Best for
Manual	Floor temperature	Budget, single zone
Programmable	Hourly schedule	Kitchen, entry
Wi-Fi / smart	Remote control	Rental, short-stay
Air sensor	Rare in bathroom	Use carefully near moisture

In bathrooms, use floor temperature limit and sensor in conduit. In programmable models, night setback in bedroom and hallway cuts bills without losing morning comfort.

Combining with radiators and central heat

In short: underfloor heat supplements radiators — it does not always replace them.

In Moscow flats on district heating:

• radiators remain primary heat in rooms;
• floor heat adds foot comfort and drying in bathroom;
• on loggia merge, rebalance heat — sometimes electric convector or kept radiator;
• do not cut heating riser without engineering — it breaks building balance.

Zone	Radiator	Underfloor
Bedroom	Primary	Optional local
Bathroom	Often weak	Almost always yes
Kitchen	Yes	Yes at sink
Loggia	Usually no	Yes if insulated

In capital renovation, plan heat at electrical and screed stage — see renovation stages. Retrofit after laminate costs multiples.

What Profmaster can do

Profmaster designs and installs underfloor heating as part of capital turnkey renovation in Moscow and the region — aligned with screed, tile, panel, and wet zones.

We are a fit when:

• you need heat in bathroom, kitchen, entry, or loggia;
• floor height and doors must stay coordinated;
• RCD wiring and pre-screed acceptance matter;
• heat is part of whole estimate, not a separate crew;
• resale needs panel survey before fixing load.

In business since 2006. Request on contacts; formats on services.

Examples by apartment zone

In short: do not heat entire area — only use scenarios.

Zone	Loop area	Type	Guide
Bathroom 4 m²	3–3.5 m²	Cable under tile	12,000–22,000 RUB
Kitchen at sink	2–3 m²	Mat	8,000–16,000 RUB
Entry	3–4 m²	Mat	10,000–20,000 RUB
Loggia 5 m²	4–5 m²	Cable	25,000–45,000 RUB

In bathroom and kitchen work, plan heat before tile and waterproofing.

Estimate: how to fix underfloor scope

In short: one line "underfloor 40 m²" without detail breeds disputes.

Confirm in the document:

1. Heated area only (exclude fixed furniture).
2. Type: mat, cable, or hydronic loop.
3. W/m² power and total load.
4. Thermostats — count and model.
5. Substrate prep and screed.
6. Bathroom waterproofing under loop.
7. Resistance act and photos before cover.
8. Excluded zones on plan.
9. Junctions with other flooring.
10. Warranty on heating electrical work.

How to read the full estimate: How to Read a Renovation Estimate. Flat band: comfort calculator.

Warranty and operation

In short: keep layout diagram and resistance act — service needs them.

At handover verify: even zone heating, no overheat under fixed furniture, thermostat function, no screed cracks at the floor sensor location. Electrical warranty is often 2–3 years; heating materials per manufacturer data sheet. For whole-flat timeline, align with new-build stages — underfloor work sits between rough electrics and screed, before doors and final flooring.

Summary

Underfloor heating during Moscow apartment renovation is chosen by zone and floor build: electric with waterproofing in wet areas; hydronic possible with capital screed. Do not heat under fixed furniture; verify panel; document cable before cover.

In short: zone, load, sensor, act — four pillars of comfort without rework. Plan them when the screed is still open — not after move-in. A one-hour layout review before pour saves weeks of tile demolition and neighbor complaints later.