The short answer
Underfloor heating should be designed and fitted by a professional — a Gas Safe registered heating engineer for a wet system off a boiler or heat pump, or a NICEIC registered electrician for an electric system. At a high level the job runs from survey and design, to preparing and insulating the floor, laying the wet pipework or electric mat, connecting it to the heat source or electrical supply, adding the screed or floor finish, fitting controls, then commissioning and sign-off. This page is a buyer’s overview of what an installer does so you know what to expect and can brief and compare quotes — it is not a do-it-yourself guide. Wet and electrical heating work must be carried out by a suitably registered professional.
You don’t need to know how to lay pipework yourself, but understanding the stages of an installation helps you plan the disruption, ask the right questions and compare quotes fairly. This overview walks through what a professional installation involves from a homeowner’s point of view. All figures are typical illustrations rather than quotes, and the work itself should always be carried out by an appropriately registered installer.
Installation at a glance
- Wet system fitter Gas Safe heating engineer
- Electric system fitter NICEIC electrician
- Starts with Survey & design
- Key build-up Insulation under the system
- Ends with Commissioning & sign-off
- Standards Building Regs Part L & P
The stages of a professional installation
An installation usually follows the same broad sequence whoever does it. The detail varies between a wet and an electric system and between a new build and a retrofit, but the stages below give you a clear picture of what an installer will do and where the time and cost go. Understanding them helps you read a quote and judge whether anything important has been left out. See the cost guide and wet vs electric.
| Stage | What the installer does |
|---|---|
| 1. Survey & design | Measures rooms, checks the floor and heat source, designs the layout, zones and controls |
| 2. Floor preparation | Prepares the subfloor and lays insulation so heat goes upward, not into the slab |
| 3. Lay the system | Fits wet pipework to a manifold, or rolls out the electric mat/cable per the design |
| 4. Connect | Connects a wet system to the boiler or heat pump; an electrician wires an electric system |
| 5. Floor build-up | Adds screed or a low-profile board, then the chosen floor finish over the top |
| 6. Controls | Fits thermostats and zone controls so each area can be set independently |
| 7. Commission & sign-off | Tests, balances and commissions the system, then issues certification |
Why it needs a registered professional
Underfloor heating ties into either your gas or heat-pump heating system or your electrical supply, so it falls under regulated work. A wet system should be designed and connected by a Gas Safe registered heating engineer, who will size it correctly, balance the flow and commission it safely. An electric system should be wired and certified by a NICEIC registered electrician under Building Regulations Part P. Using a registered professional means the system is designed properly, installed safely and certified — which also protects any manufacturer warranty. This is why we connect homeowners with registered installers rather than offering installation ourselves.
What this means for your quote
Knowing the stages helps you sense-check a quote. A good written quote should make clear the system type (wet or electric), the number of zones and controls, the floor build-up and finish, how the system connects to your heat source or supply, and that commissioning and certification are included. If a quote is vague on insulation, controls or sign-off, ask. Comparing three itemised quotes on the same brief is the simplest way to judge value and scope. See getting quotes. This is general information; the right specification varies with your home, heat source and chosen installer.
Compare underfloor heating quotes
Now you know what the job involves, the next step is a survey and an itemised quote. Use our service to compare quotes from a Gas Safe heating engineer in your area.
Frequently asked questions
Who should install underfloor heating?
A wet system off a boiler or heat pump should be designed and fitted by a Gas Safe registered heating engineer; an electric system should be wired and certified by a NICEIC registered electrician under Building Regulations Part P. Using a registered professional keeps the work safe, compliant and warranty-backed.
Can I install underfloor heating myself?
Wet and electrical heating work must be carried out by a suitably registered professional to be safe, compliant and covered by warranty, so we do not publish do-it-yourself installation instructions. This page is a buyer’s overview of what an installer does so you can plan the job and brief a quote.
How long does an underfloor heating installation take?
It varies with the room count, whether it is wet or electric, and new build versus retrofit. A wet system in screed also needs time for the screed to cure before use. Your installer will give a timeline as part of the quote — ask for it up front.
Does underfloor heating need to meet Building Regulations?
Yes. Efficiency standards fall under Building Regulations Approved Document L, and electrical work falls under Part P. A registered installer will design to these standards and provide the relevant certification on sign-off.
Sources & further reading
- Gas Safe Register — registered heating engineers for wet systems
- NICEIC — registered electricians and Building Regulations Part P
- Energy Saving Trust — heating systems and efficient design
- Manufacturer guidance — system design, floor build-up and commissioning
- GOV.UK / Building Regulations Approved Documents L & P
This is a general buyer’s overview, not do-it-yourself instructions or advice for your specific installation. Wet and electrical heating work must be carried out by a suitably registered professional — a Gas Safe registered heating engineer for wet systems or a NICEIC registered electrician for electric systems. We are an independent information and introduction service, not an installer.