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Family run · Hayes, near Bromley

Underfloor heating, expertly installed.

Constant Hot Water is a father and son underfloor heating business, run together by Ian and Luke Constant. They fit wet and electric underfloor heating across Bromley, South East London and Kent.

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Underfloor heating is our whole business, for homeowners, builders and the trade.

Wet underfloor heating pipe laid in tight even loops over insulation across the floor of a modern extension with full height glazing onto a garden, ready for screed.
A wet in screed installation in a contemporary extension. See more in projects.
More than 45 years of combined experience Rated on Google and Checkatrade Wet and electric systems Supply and installation, or installation only Homeowners and builders
Reviews

What clients and builders say

Feedback from clients and builders, taken from our Google and Checkatrade profiles.

  • I have been a customer of Ian and his team for nearly 20 years. They handled the heating system installation in my new build in 2010, and I later invited them to redo the heating in my French house. They are now finishing another new build with me. I would never use anyone else.
    Daniel Hopkins Google · 2026
    Long standing client, new build and renovation work
  • Having known and used Ian, Luke and their team for twenty years and on countless projects, I can only praise their professional and can do attitude. Our plumbing and heating contracts are mostly on large, high end properties.
    M.R. Google · 2025
    Plumbing and heating contractor, around 20 years working together
  • Reliable service, neat on site and a great experience with the team.
    Google reviewer Google · 2026
  • Constant Hot Water are my go to for underfloor heating installers on my renovation projects. Would recommend 100%.
    Verified customer Checkatrade · 28 November 2025
    Underfloor heating installation, job in the BR8 area
  • The team at Constant Hot Water have helped us on multiple projects. Always efficient and the systems work great. Recommend to anyone doing renovations. The underfloor heating makes all the difference, especially when installed professionally.
    Verified customer Checkatrade · 22 November 2025
    Underfloor heating installation, job in the BR2 area
  • I cannot recommend these guys enough. They did a fantastic job of our underfloor heating. They are reliable, efficient and tidy. Top class.
    Verified customer Checkatrade · 26 September 2025
    Underfloor heating installation, job in the BR4 area
  • I have used Constant Hot Water on one of my projects. Very happy with the quality of work, really nice friendly guys. I would recommend them.
    Marcus Seale Checkatrade · 17 October 2025
    Underfloor heating installation, job in the SE9 area
  • Very happy with our install.
    Verified customer Checkatrade · 12 December 2025
    Underfloor heating installation, job in the KT10 area

Read more on Google and Checkatrade, or see all the reviews on this site.

What we do

Underfloor heating is our whole business

Ian and Luke Constant and their team work on underfloor heating and nothing else. That covers a wide range of jobs, from a single bathroom to a whole house, in new builds, extensions, renovations and older homes.

The systems we fit

The projects we take on

Not sure which suits your property? Tell us about it and we will talk it through.

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A large room lined with foil faced insulation, its floor covered edge to edge with underfloor heating pipe clipped in even loops, ready for screeding.
Wet underfloor heating set out across a large room, ready for screed.
Why Constant Hot Water

Built around real workmanship

Underfloor heating is buried in the floor for the life of the building, so it has to be right first time. We plan the layout around your floor build up and how the rooms will be used, lay the pipe or panels neatly, connect the manifold and controls, and pressure test before the floor goes back down.

Ian and Luke run Constant Hot Water together as a father and son team. A lot of our work comes back to us through the same builders and clients, year after year.

  • Wet and electric systems
  • In screed, overlay and between joists methods
  • Supply and installation, or installation only
  • Work for homeowners and for building projects alike

More about the business

Recent work

A look at the installations

A closer look at recent underfloor heating installations by the Constant Hot Water team, from individual rooms to larger renovation and building projects.

  • Overlay underfloor heating in a glazed garden room

    • Wet system
    • Overlay system
    • Garden room

    A low profile overlay wet system running through a glazed garden room and into the adjoining space. Grooved insulation panels are laid over the existing floor and the pipe is pressed into the routed channels, so the finished floor level barely changes. A good approach where digging out for a deep screed is not practical.

  • Underfloor heating at first fix on a building project

    • Wet system
    • In screed
    • New build

    A wet underfloor heating circuit run across several rooms at first fix stage. Timber stud partitions and blockwork are up, first fix plumbing is in, the floor is built up over insulation and membrane, and continuous pipe is laid in flowing loops from room to room, ready for screed.

  • Wet underfloor heating installed between timber joists

    • Wet system
    • Between joists

    This wet underfloor heating system was installed between timber joists across several connected areas of an existing property. The photographs show the pipework fitted neatly within the timber floor structure before the final floor finish was installed.

See more projects

Who we work with

Homeowners and builders, mostly

Most enquiries come from people renovating or extending their home, and from builders who want a dependable underfloor heating specialist on the job. We also work with developers, architects, heating contractors and commercial clients.

Homeowners

Renovating, extending or building. We’ll talk you through wet or electric, what your floors will take, and how it fits with your builder’s programme.

Renovations and extensions

Builders and trade

One reliable point of contact for the underfloor heating package. We work from your drawings, to your programme, and pressure test before screed.

Builders and trade partners

How it works

A straightforward process

  1. 1

    Talk it through

    Tell us about the space, the heat source and the stage you’re at. Where it helps, we’ll visit to look at the floor and levels.

  2. 2

    Plan the layout

    We set out the pipe or panel layout to suit the rooms, the floor build up and how you’ll use the space.

  3. 3

    Install and connect

    We fit the pipework or panels, connect the manifold and controls, and pressure test before the floor goes back over the top.

  4. 4

    Set it up with you

    We set the system up and show you how to use it. For anything specific to your project, just ask.

Where we work

Bromley, South East London and Kent

Based near Hayes and Bromley, Constant Hot Water works across Bromley, South East London and Kent, with suitable projects undertaken elsewhere in London.

Bromley

Our home patch. Bromley and the BR postcodes, next door to our base in Hayes.

Underfloor heating Bromley

South East London

Retrofit and extension work across the SE postcodes, our established operating area.

Underfloor heating South East London

Kent

New builds and larger renovation projects across Kent.

Underfloor heating Kent

See all the areas we cover

Planning underfloor heating? Let’s talk it through.

Tell us about the project and we’ll come back to you with what we need to know and where to go next.

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