Send Us Your Drawings — Free Technical Markup From the IM Team
The cheapest time to fix an air leak is before anyone picks up a tool.
Most failed air tests aren’t caused by bad products or bad workmanship — they’re caused by details nobody resolved at design stage. The joist end nobody sealed. The service penetration that appeared after the drawings were signed off. The junction where two trades each assumed the other one had it covered.
So we’ve made it very simple: send us your drawings, and we’ll mark them up for you — free.
What you get back
Our technical team reviews drawings every week for architects, contractors and self-builders. Send yours and we’ll return them marked up with:
- The airtight and vapour control line traced through your build — where Passive Purple goes, where fleece tape takes over, where the sealant earns its keep
- The weak points flagged — joist ends, window reveals, penetrations, floor-to-wall junctions: the places air tests are lost
- A product spec for your build method — timber frame, blockwork, ICF, steel or retrofit — with coverage rates so you can price it properly
- Where the vapour control layer sits — we don’t run condensation risk analysis ourselves, but we’ll tell you where the VCL belongs in your build-up and point you at the free analysis services the insulation manufacturers offer
How it works
One email. Attach the drawings (PDF or DWG), tell us the build type and your airtightness target, and hit send. The Send Us Your Drawings page — now in our Technical Corner menu — has a button that opens your email with everything pre-filled.
No charge, no obligation, no “book a discovery call”. Just mark-ups from people who put these products on walls every week.
Why we do it free
Simple: buildings that are detailed properly pass their air tests, and passed air tests are the best advert we have. Whether you’re an architect resolving a Passivhaus detail, a contractor pricing a re-clad, or a self-builder staring at a section drawing wondering what on earth goes where — send it over.
Your drawings. Our mark-ups. Better buildings.