At Back to Earth, we understand that navigating sustainable building can be overwhelming. With so many materials and options, choosing what’s right for your project isn’t always easy. That’s where our spec generator comes in an easy-to-use tool to get you started with eco-friendly materials.
What’s the spec generator? Think of the spec generator as your first step. Answer a few questions about your project’s needs—whether for the roof, floor, or walls—and then after a few clicks you’ll receive a free tailored specification. This includes a breakdown of recommended materials, direct links to product pages, and a 3D model to visualise how everything fits together. You’ll also get U-value and condensation risk calculations, all conveniently sent to your inbox.
But that’s not where the support ends. Our friendly, knowledgeable technical team is ready to help you make the most of this information. When you give us a call, we’ll already have your spec details in hand, so we can dive straight into discussing your specific needs, answering questions, and ensuring you have all the insights needed to get your project off to a strong start.
With the spec generator and our team by your side, taking a sustainable approach to building has never been simpler.

Fixit 222 Aerogel insulating plaster
Fixit 222 Aerogel insulating plaster is a machine applied lime plaster, suitable for insulating modern and historic buildings alike. Its extremely low thermal conductivity of 0.026 W/mK allows thin layers