Hemp Block Render System (Ventilated Facade)

This build up utilises the best sustainable insulation materials to ensure you have a system that performs fantastically well.

This system can insulated between studs with one of our recommended flexible insulations such as Pavaflex wood fibre or IndiTherm hemp insulation. The internal wall will have a beautiful lime plaster finish and the external wall is completed using lime render.

The depth of the studs and the thickness of the hemp blocks can be varied to suit the brief for your property. This build up combines all the advantages of timber frame construction with the exceptionally high thermal mass of hempcrete blocks for year round comfort.

It is possible to achieve Passivhaus standards with this system because of the use of either hemp or wood fibre insulation and added thermal mass from the Hempcrete blocks.

CROSS SECTION OF SYSTEM

Render Finish
– BAUMIT SILIKON TOP (cost effective)
– BAUMIT SILIKAT TOP (higher breathability)
– BAUMIT STAR TOP (coastal/exposed locations)
BAUMIT PREMIUM PRIMER for suction and key
6-8 mm BAUMIT MC55W render base coat with BAUMIT STARTEX embedded mesh
FIBROLITH WOODWOOL render carrying board

5. 50mm min ventilation zone
50mm counter batten with PAVAFIX SN BAND screw sealing tape
6. Breathable membrane
– Optional for closed cladding ADB MEMBRANE

7. Sheathing board – ISOLAIR MULTI
– EJOT STR H (1 per board to pin in place, 40mm min embedment)
– HECO TOPIX plus – (6 per sqm, fix through batten into stud, 40mm min embedment)

8. Stud insulation
– PAVAFLEX – PAVATEXTIL-P UNIVERCELL+ – SHEEP WOOL OPTIMUM – INDITHERM
9. Optional airtightness and support layer DB3.5 membrane or OSB/3 racking board
– all junctions sealed with airtightness tape PAVAFIX 60 / PAVAFIX 20/40 / PAVAFIX 150
10. HEMP BLOCKS – secured to timber frame with stainless steel timber frame ties
11. 8mm BAUMIT RK38 lime plaster base coat with BAUMIT STARTEX embedded mesh
12. 3mm BAUMIT RK70 lime plaster finish coat