Flat Roof Insulation System

The high performance flat roof system featuring PAVATEX woodfibre complies with the most stringent of standards – from baseline building regulations through to Passivhaus.

Excellent thermal performance, high protection from summertime overheating, humidity regulation, acoustic insulation and superior sustainability credentials. This low embodied carbon solution is the first choice for specifiers and homeowners alike. Woodfibre roofs are the simple, yet sensible system for zero carbon homes of the future.

The system is suitable for most external finishing options, including; sedum, metal, timber or similar decking

SYSTEM PERFORMANCE

U-values
0.26 – 0.10 W/m².K

Y-values
Available upon request from insulation manufacturer.

PRODUCT DOWNLOADS

Flat Roof Technical Manual

Flat Roof System Sheet

1. Finish covering (green roof/single ply/metal sheeting)
2. 25mm WBP plywood deck
3. 100mm min ventilation zone
   – 100x50mm counter batten with PAVAFIX SN BAND
4. ADB BREATHABLE MEBMRANE

5. Above rafter insulation – ISOLAIR MULTI or PAVAWALL GF
6. Full-fill rafter insulation – PAVAFLEX / PAVATEXTIL-P / SHEEPWOOL OPTIMAL / INDITHERM
7. Airtightness and support layer – OSB/3 / DB 3.5 AIRTIGHTNESS MEMBRANE

8. Optional service void (can be insulated for improved performance)
9. Plaster carrying board – FIBROLITH / plasterboard / timber boarding
10. 6-8mm lime plaster base coat BAUMIT RK38 or MC55 with STARTEX embedded mesh
11. 3mm BAUMIT RK70 lime plaster finish coat