Underfloor Heating

Efficient, Comfortable, and Cost-Effective Heating for Your Home

At Gasmark1, we can design and install reliable, energy-efficient underfloor heating systems that bring luxurious warmth to your home while reducing your energy bills. Whether you’re upgrading your heating system or planning a new build, our experienced engineers are here to help every step of the way.

Why Choose Underfloor Heating?

Underfloor heating (UFH) is an increasingly popular choice for homeowners seeking a modern, low-maintenance alternative to traditional radiators. It distributes heat evenly throughout your space, ensuring consistent comfort and freeing up wall space for a clean, uncluttered look.

Energy Efficiency

Operates at lower temperatures than radiators, reducing energy consumption.

Even Heat Distribution

No cold spots – just consistent, comfortable warmth underfoot.

Space Saving

Eliminates the need for bulky radiators.

Compatible with Renewable Sources

Perfect for use with heat pumps and solar systems.

Ideal for Any Room

Kitchens, bathrooms, living rooms, and extensions.

Expert Installation Services from Gasmark1

At Gasmark1, we pride ourselves on delivering high-quality underfloor heating systems tailored to your home’s layout and your lifestyle. Our certified heating engineers have decades of experience and only use trusted brands and materials to ensure long-lasting performance.

1. Consultation & Quote

We assess your property and provide a no-obligation quote free of charge.

2. Custom System Design

Tailored to your room sizes, floor types, and heat requirements.

3. Professional Installation

Fast, tidy, and fully compliant with UK building regulations.

4. Testing & Commissioning

Full system testing to guarantee performance and safety.

We install both wet (water-based) and electric underfloor heating systems, suitable for a variety of floor finishes including tile, laminate, engineered wood, and carpet.

Why Choose Gasmark1?

Over 30 years of heating industry experience
Gas Safe Registered Engineers
Fully insured & certified installers
Local, reliable, and customer-focused

Meet Our Team

Request a Quote Today

Transform your home with efficient, invisible warmth beneath your feet. Contact Gasmark1 today to discuss your underfloor heating needs. We serve Watford and the surrounding area, offering expert advice tailored to your home.

Wayne Harris

4 months ago

We’ve recently had three bathrooms fully refurbished along with a complete new heating system and boiler relocation, and our experience from start to finish has been fully deserving of five stars.

The whole team have been very professional throughout. From our first visit to the showroom and throughout consultations, site surveys and delivery of the project, the communication has been clear and consistent, and nothing ever felt like too much trouble — the team have a genuine “can do” attitude and creative approach that is focused on delivering great service and a fantastic end result.

The project has felt like a partnership rather than a blunt client/contractor relationship and they have worked with us from the start to explain options, offer suggestions and work with us to get the details right.
Just as importantly, they were reliable and respectful of our home — turning up when they said they would, keeping things tidy, and keeping the schedule on track.

Stew was extremely helpful during the consultation and design process and Jason was incredibly meticulous with the central heating works.
Special mention goes to Tom H. for his attention to detail and for working tirelessly to ensure that we were satisfied.

We’ll definitely be using Gas Mark 1 / Herts Bathrooms again for future work and wouldn’t hesitate to recommend them.

Martin Geoffrey Moore

A nice experience. We recently refurbished our bathroom and these guys were great. We were very impressed by their total attention to detail, their focus on the job and the way they made every effort not to leave any debris or waste behind them. Thank you!

Jo Windmill

Tom and Harry, really professional - great job! Would recommend. Thank you 🙏

Kevin Petty

6 months ago

Thanks to Charlie, Tom and all the team for a fantastic job. We are delighted with our new bathroom. From start to finish great care and organisation has been taken to keep disruption to a minimum.
We have no hesitation in recommending Gas Mark 1

James

7 months ago

Very happy customers! Gas Mark 1 and Herts Bathrooms were excellent every step of the way. Communication was fantastic throughout and the work was undertaken to our complete satisfaction. Gareth (engineer) and his team were polite, considerate and very easy to get on with. Highly recommended

Libby Pfeiffer

We are delighted with our new kitchen. It is lovely and most importantly, it was put in so well by GasMark1.
Alex and co were totally professional, polite (and nice).
Special mention and thanks for Alex, a Perfectionist!

Natasha Proctor

Would absolutely recommend Gas Mark 1 - we got our boiler replaced, a new radiator installed and an electric shower put in the bathroom and the team were brilliant. Always arrived on time each day, were very knowledgeable and great at explaining what was happening and left the house without any mess. We'll be getting them back in for work on the kitchen next!

Coral

8 months ago

We had Gas Mark 1 round to install our washing machine. Barney visited this morning to survey the job and managed to get two guys to install a couple of hours later. Great service as usual. They installed our kitchen 7 years ago and were reliable then. Great to see their customer service is still the same as are the three guys that came today, so not a high staff turnover.
Wouldn't hesitate in recommending this company.