Cambridge, UK

Roofs should do more than just keep the rain out.

Zenitherm is developing a switchable roof film and controls that put a building's roof to work heating and cooling it, to cut the energy bills of stores, restaurants, gyms and other low-rise buildings.

Get in touch

How it works

One roof film, two jobs, and controls that work with what you have.

Heat from the sun

In the heating season, the film soaks up the sun's heat and puts it to work warming the building.

Cooling from the sky

In summer, it switches to shed heat to the sky instead, so your cooling has less to do.

Works with what you have

Our controls decide when to switch and work alongside your existing heating and cooling. The film is standalone and needs no power from the building.

For building owners and operators

Become an early partner

We're looking for a small group of owners with low-rise buildings, flat roofs and rooftop heating and cooling units: big-box stores, shopping centers, restaurants, gyms and supermarkets.

Not sure yours fits? Send us the bills and we'll tell you.

Email us thomas [at] zenitherm.co.uk
  • 1
    A free savings estimateFrom 12 months of energy bills: your likely saving and payback, in confidence.
  • 2
    A place on our early-partner listFirst call on our first installations.
  • 3
    No commitmentJust a conversation about one or two of your buildings.

Investors, partners and suppliers

We'd be glad to hear from you too. You can reach Thomas Marsh, our co-founder and CEO, at:

thomas [at] zenitherm.co.uk