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ProWall rainscreen cladding is an external envelope system with a range of colours and finishes from the ProRend Colourtex render system. The rainscreen cladding is installed, creating a clear cavity from the main superstructure, and providing healthy living by allowing the building to breathe and to provide protection from the elements.

System includes:

  • ProBoard timber frame fixings.
  • ProBoard Advanced Render Carrier Board is a cementitious substrate. It is fixed with austenitic stainless steel (A2) fasteners into timber or metal studs.
  • ProRend Lite Basecoat.
  • ProMesh Grade 3.
  • ProRend Colourtex (with primer) or ProRend Mineraltex.

Timber frame and battens provided by others (minimum batten size 25 x 75 mm).

Features and benefits:

  • Complies with Building Regulations Approved Document B Nov 2018 Amendment (can be used over 18 metres).
  • Horizontal ventilated cavity barrier seals tested to 99 minutes' integrity (testing conducted by Chiltern International Fire Ltd).
  • Clear cavity, creating a breathable render system.
  • System durability up to 60 years. BBA certificate 13/4983.
  • Water-repellent silicone resin finish.
  • Low maintenance and reduced preliminary costs.

ProWall helping hand system:

The ProWall Helping Hand system for steel frame structures works in conjunction with façade supporting systems, utilizing the innovative bracket and rail system to create a solution that eliminates the cold bridging commonly found when installing rainscreen systems over a steel frame.

It allows the placement of insulation outside the frame, creating a warm steel frame whilst maintaining a clear, ventilated cavity between the insulation and rainscreen system.


  • Brackets precision-engineered from 3-mm structural grade aluminium.
  • Rails engineered from 2.2 mm-high specification 6063 T6 aluminium.
  • Designed for fixed and floating points.
  • Integral isolation pad to reduce cold bridging.
  • Unique three-part design offers superior performance and wider spanning.
  • Integral rail location clip to aid initial positioning.
  • Rails supplied in 6 m lengths.


  • Residential.
  • Commercial.
  • Education.
  • Healthcare.
  • New build.
  • Refurbishment.
  • Extension.
  • Highly water-repellent silicone resin finish.
  • Low maintenance costs.
  • Reduced preliminary costs due to quick installation.

Suitable substrates:

  • Timber frame.
  • Warm steel frame.
  • Cold steel frame.
  • Structural Insulated Panel System [SIPS] (subject to assessment.)
  • Masonry (renovation).
  • Uniform grained.

Reflective values:

Where intense or dark colours are used, the surface will be subject to increased thermal stress from (for example) solar radiation. Significant fluctuations in temperature, as experienced in temperate weather climates, will cause premature degradation in the finished surface. The dissipation of this heat will vary, dependent upon the background, and accordingly 'reflective values' should be adhered to as follows:

  • ProWall or other ventilated cement board systems: >5% clarity.

Standard product features

Technical characteristics:

- ProWall:

  • Size: 1200 x 2400 mm.
  • Thickness: 12.7 mm.
  • Weight per sheet: 42.2 kg.
  • System weight: ~22 kg/m².
  • Render carrier board (ProBoard) Fire classification EN 13501-1: A1.
  • Compressive strength: 15.5 N/mm².
  • Weight: 14.65 kg/m².
  • Bending radius: 1500 mm (150 mm with ProBoard Flex).
  • Thermal conductivity: 0.196 W/mK.
  • Linear variation due to moisture: 0.05 %
  • Water absorption % by weight/ 24 hours: <8.
  • Freeze/ thaw cycles: 100.

- ProWall Helping Hand System:

  • Tensile strength: 200–240 N/mm².
  • Yield strength: 170 N/mm² (minimum).
  • Shear strength: 125 N/mm².
  • Elongation: 4–8 %.
  • Brinell hardness: 60 HB.
  • Thermal conductivity: 149 W/mK.
  • Electrical conductivity: 39.4 %.
  • Coefficient of thermal expansion: 23.5 x 10^-6 1/K.
  • Elastic modulus: 70 000 MPa.


Colour/ Finish:

- ProRend Colourtex:

  • 12 standard colours plus RAL, NCS, BS 4800, Sto, K Rend, Parex and Weber colour matches available; insert requirements.
  • Available in grained or uniform texture.

- ProRend Mineraltex:

  • White as standard, also available Cream, Ivory or Wheat.
  • Can be painted with ProRend water-repellent masonry paint or ProRend self-clean masonry paint.
  • Masonry paints can be tinted to over 35 000 colours including RAL, NCS or BS colours; consult manufacturer for details.


Various accessories are available; consult technical literature for details.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
25-80-70/120 Drained and back ventilated rainscreen cladding system

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying



SAS Europe Ltd


+44 (0)1647 24620

Product reference


Colour/ Finish

[ProRend Colourtex]
See 'Options' and insert requirements. Includes colour-matched Colourtex primer.
[ProRend Mineraltex]
See 'Options' and insert requirements.


[ProWall base bead]
[ProWall noseless meshed angle bead]
[ProWall slip joint]
[ProWall ventilation bead]
[ProWall window head bead]
[ProWall window protection bead]

Manufacturer details

Cheriton Bishop,
Devon, EX6 6JE
Tel +44 (0)1647 24620
Fax +44 (0)1647 24020
NBS Plus