Build the full technical diagram plan for a cavity-wall insulation survey — every elevation drawn to scale, treatable areas and POPT calculated live, and a polished PDF with a full breakdown and a 3D model of the property. Made by surveyors, for surveyors.
Set the wall height and width, then drag windows, doors, untreatable areas, wall types and drilling points onto the to-scale grid. A worked example is loaded so you can see how it fits together.
Wall, window/door and untreatable areas total up live for every elevation, and the whole-house POPT figure updates as you draw — no spreadsheet needed.
One click produces the finished PDF: every elevation with its schedule, a full property breakdown, and a 3D model of the house assembled from your drawings.
Upload your floor plan(s) (JPG or PNG) — one image per storey is ideal. The bottom edge of the plan is the front of the house. Generate whole property builds all four elevations (Front/Rear/Left/Right) from the plan in one go; or use Just this elevation for the one selected below. Always review the counts and wall sizes before exporting.
Save the current plan to your account, then load it on any device.
Free is great for one-off diagrams. Pro keeps your work safe and lets you pick up where you left off on any device.
Secure checkout by Stripe. After payment we'll email you a link to choose your own username & password.
Sign in with your username and password. Don't have an account? Start a free 1-day trial below, or get Pro (£10/mo) — we'll email you your login once you've paid.
Choose the username and password you'll sign in with. Your Pro account is ready — this is the last step.
Create a Pro account for a customer. They sign in with the username and password you set here — write the password down, it isn't stored in readable form.
You're on the free version. Your PDF will download, and the
diagram will then be cleared so you can start the next one.
Want to keep your plans? A Pro account (£10/mo) saves every plan to the cloud —
nothing is cleared, and you can reopen plans on any device.