October 2026 – Retro Ecowall Details Part 2
This is the second set of Retro Ecowall® details produced in collaboration with Ecological Building Systems, following on from Part 1 which covered the core system build-up and junctions at roof eaves, intermediate floors, and wall intersections.
This set addresses the remaining junctions that are critical to a complete and airtight installation: window and door reveals, secondary glazing, ground floor interfaces across a range of floor types and conditions, service penetrations, and the junction with an existing timber stud partition. Together, the two sets provide comprehensive detailing coverage for the Retro Ecowall® system across the full range of conditions likely to be encountered in the retrofit of a solid brick or stone dwelling.
Details included in this set:
- Retro Ecowall – window jamb – plan
- Retro Ecowall – window head & cill – section
- Retro Ecowall – secondary glazing – section
- Retro Ecowall – suspended ground floor – section
- Retro Ecowall – new solid ground floor with insulation below slab – section
- Retro Ecowall – new solid ground floor with Diathonite thermostep – section
- Retro Ecowall – existing solid ground floor upgrade with Diathonite thermostep – section
- Retro Ecowall – door head and threshold – section
- Retro Ecowall – door jamb – plan
- Retro Ecowall – service penetrations – section
- Retro Ecowall – external ground 1m above with Watstop tanking – section
- Retro Ecowall – timber stud partition to external wall junction – plan
New Details
Ecological Building Systems
These details have been produced in collaboration with Ecological Building Systems.



























