ᐅ Facade Insulation (Garden Shed) – Any Tips?

Hello everyone,

I want to insulate a small garden shed to be able to heat it more efficiently from the inside during winter if needed. (With exterior insulation boards made of mineral wool, e.g., Ultimate Kontur FSP-032 or Rockwool Fixrock) there is the added benefit of some sound insulation in case the shed is used for longer periods after a barbecue evening.

The current wall construction is a wooden frame structure filled with approximately 8cm (3 inches) of hardboard panels. Inside, we plan to add OSB boards (22mm (0.87 inches)) directly for some rigidity, followed by a drywall panel. Now I am considering how to insulate the exterior (between 40-80mm (1.5-3 inches), ideally 60mm (2.4 inches)).

First alternatives would be:

• 60mm (2.4 inches) ETICS insulation board (based on EPS) for direct rendering
• 60mm (2.4 inches) Rockwool Coverrock 2 facade insulation render carrier boards
• 40mm (1.5 inches) Isover Ultimate Kontur or Rockwool Fixrock with ventilation gap and then Fermacell Powerpanel H2O boards

I am actually leaning towards something more breathable, so I have questions regarding option 3:
A. Can a wooden substructure be used to create the ventilation gap?
B. What would be the minimum required width for the ventilation gap?
C. Are Fermacell boards suitable in terms of bending and impact resistance with an existing ventilation gap?

Best regards

Does anyone have a tip or experience with WVDW made of stone wool (as plaster carrier boards)?

Info: My architect says that the advantages (regarding vapor permeability) are largely balanced out again with stone wool insulation once the plaster layer is applied. (This confused me a bit because mineral-based plaster or silicone resin plaster is supposed to be vapor permeable).

Hello

I would also lean towards option 3 – separating weather protection and thermal insulation.

I can’t say anything about the Fermacell board. We have walls with a timber frame – wood fiber insulation board – ventilation space – and HPL panel.

Olli

Hi,
what was applied to the HPL panel?
Option 3 would also be my preferred choice, although I need to clarify here whether 1-2cm (0.4-0.8 inches) of ventilation space would be sufficient and whether a wooden structure is possible instead of the original spacers.

Hello

The HPL panel is finished as is on its surface.



Olli