Solutions for timber roofs & walls

STEICO sarking boards and wall panels are hydrophobic, i.e., water-repellent. Rainwater’s surface tension cannot break through sarking boards like UNIVERSAL / PROTECT / SPECIAL Dry, but runs off the surface.

The boards are provided with a tightly closing, all-round tongue and groove profile and thus offer a rainproofing function and serve as temporary covering.

Boards up to 240mm thick are available .


  • Water resistant sarking & sheathing for roof & wall uses
  • Excellent thermal + sound proofing insulating properties
  • Boards can be exposed to the elements for up to two months
  • Vapour open. Allows trapped moisture in the wall fabric to escape
  • Reduces thermal bridging in the building elements
  • Tongue & Groove on all 4 sides preventing unwanted air drafts
  • Provides structural strength to the building element
  • Good fire resistant qualities
  • Easy to cut & install 
  • Suitable for a natural render finish
Installation process is easy
Check out this video of a rigid insulation board being installed over rafters
Wall Fixing methods  
Boards fixed over a timber frame 

The sheathing boards can be temporarily secured to the timber frame with typical wood screws. Battens can then be fixed over the boards and secured into place with timber screws.

wall drawing.png
For rendered boards

If you are planning to render the board, they can be secured to your timber frame using large head stainless steel staples or specialised screws with a plastic washer. 

Typical roof detail  

A double batten system is used to fix the boards to the rafters and for the fixing of the roof cladding (tiles or metal sheets). The space between the battens provides an air gap for air flow and for the evaporation of any trapped humidity in the roof envelope.
Roof insulation sample.jpg
Below are some generic details for tiled roofs. However, same principal applies for roofs with metal sheets.
Need more technical information ?

You can download the Installation Guides: Rigid insulating  Sheathing & Sarking boards  as well as the Product Data Sheet in our Downloads section.