Home/Why Rayo

Small-business mindset, large-business capability

Specialist building physics from people you can call, at a fee a scheme of any size can carry.

01What we bring

The best of both

Small-business mindset

People you can call

You deal directly with the people doing the modelling. We answer the phone, work to your programme and tell you early if anything changes.

Rayo Energy

One team, start to finish

Energy, daylight and overheating modelled together, with advice on what to change rather than a pass or a fail.

Large-business capability

Specialist building physics

Dynamic simulation, daylight and compliance modelling to the standards the largest engineering firms work to.

02One team

Answers that agree with each other

The window that helps a daylight result can push a room over the overheating limit, and both affect the energy calculation. Because the same team looks at all three together, you get one set of answers that work as a whole, rather than three reports that pull in different directions.

03Plain english

Reports you can act on

We do the technical work so you do not have to. Every report says what the result means for your scheme, what to change if something fails, and what each option costs.

04Certified

Certified management systems

We work to certified quality, environmental, and health and safety management systems: ISO 9001, ISO 14001 and ISO 45001.

Not sure which assessment you need?

Send the scheme anyway. We will tell you what it needs, and what it does not, including anything you have been quoted for and do not require.