Products  >  Protect - Rigid Insulation boards for external walls & roofs


Vapour open,  rigid sarking  sheathing & insulating board. 


The Protect rigid insulating boards from Steico can be installed as a protective skin over the building envelope. They provides an air-tight, water resistant, thermal break as well as a sound proofing layer.  The boards can be fixed over timber framing,  CLT's, masonry walls,  metal frames & over roof rafters. Suitable for a natural lime or clay render finish.


• Water resistant (no additional membrane needed)

​• Reduces cold & heat bridging through the structure

• Tongue & Groove on all 4 sides preventing air leaks
• Vapour open allow building fabric to breath
• Excellent fire resistance

• Good sound proofing qualities
• Environment-friendly, fully recyclable
• Provides a green architectural solution

• Available in "Wet or Dry" board

• Suitable for a render finish

Passive House Institute Certified Component

Prices (GST inclusive)  /  Thickness / R values

40mm board [R value -0.80]  $28.00 /sqm  (GST inclusive)

60mm board [R value -1.25]  $42.00 /sqm  (GST inclusive)

Stocked thicknesses: 40 & 60mm / Other thickness up to 240mm available.

Board format typically  2200mm x 750mm

Minimum order quantities: Pallet quantity

Sales terms + Delivery Options:  Learn more here

We highly recommend booking your m2 requirements well in advance. Please contact us for availability. 

Technical information

Board format typically  2200mm x 750mm

Additional info