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A high strength, external render carrier board which offers an alternative to block and render, brick, masonry or cladding finishes.

Multi-Rend is a vapour permeable, A1 non-combustible magnesium oxide building board which offers excellent dimensional stability while boasting the ability to resist moisture, frost, mould and impact.

The product is particularly suitable for external facades for structures which utilise timber, steel or hybrid framed structures. Using Multi-Rend proves to be a lightweight, thermally efficient alternative to most render carrier boards.

Typical Applications
  • Render carrier board for the following render systems:
    • Silicone
    • Acrylic
    • Cement
  • Render carrier board for the timber/steel frame structures
  • Modular Construction
  • Pre-Fabricated Caravan Construction
  • Park Homes
Product Features
  • A1 Non-combustible
  • BBA certified
  • Breathable
  • Impact resistant- In accordance with ISO 7892
  • Low Thermal Expansion
  • High strength to thickness ratio
  • Lightweight
  • Easy Cut – Score and Snap
  • Keyed surface
Environment

Multi-Rend is manufactured using a low carbon, low energy manufacturing process. The boards are naturally cured using a chemical reaction, low levels of heat and a lengthy drying out stage.

Multi-Rend has the capability to act as an internal hygroscopic buffer which in turn assists in the controlling of humidity.

This product is a breathable, hygroscopic and capillary active material, which are crucial environmental properties to take into account when designing air tight dwellings and retrofitting of solid wall ‘hard to heat’ homes. The breatheability of the product allows for the absorption and release of moisture which provides a safer and healthier working environment and overall structure.

Quick Reference Guide - Building Boards
Product
Applications
Density
BBA
Internal Use
External Use
Cutting Method
Racking to BS594
Fire rating
Fire Resistant
  • Bathrooms and shower areas
  • Wet and humid areas
  • Swimming pools
  • Passive fire protection boards
  • OSM, pods and park homes
  • Timber frame racking board
  • SIPS fire mitigation sheathing
  • Soffit strips and cavity closures
  • Fire rated stuf partition walls
  • Large sheet tile backer
  • Boiler Banking Board
  • Render carrier board
  • Suitable for use with acrylic brick strips, stone cladding etc
  • Solid fuel surround
1050kg/m³
1050kg/m³
1050kg/m³
1050kg/m³
Score and
snap
Score and
snap
Score and
snap
Score and
snap
A1 Non
combustable
A1 Non
combustable
A1 Non
combustable
A1 Non
combustable
Load and
non-load
bearing
partition
60, 90 and
120 minutes
Non-load
bearing
partition
60 minutes
Quick Reference Guide – Fire Ratings

A question we are frequently asked is which fire rated panel will provide 30 minute or 60 minute fire resistance. The answer of course is not straight forward and although fire rated panels can be used as part of a fire barrier system, such as partitions, the finished design requires additional independent testing to achieve such a rating.

Since the introduction of the Construction Products Regulation (CPR) Fire retardant panels are tested against EN13823:2002 (SBI or Single Burning Item Test) and EN11925 (Ignitability Test) and given a rating against their performance.

SBI is the key test and records parameters relating to the rate of fire growth, lateral flame spread, heat release and smoke emission.

There are seven Euroclass Classifications for fire performance of different construction materials ranging from A1 and A2 through to F. Classifications for wood based panel products such as Plywood, MDF and Chipboard include B, C, D and E. Euroclasses D and E relate to untreated material.

Class
Performance Description
Fire Scenario
Heat Attack
Examples of Products
A1
No contribution to fire
Fully developed fire in a room
At least 60kW/m2
Products of natural stone concrete, bricks, ceramic, glass, steel and many metallic products
A2
No contribution to fire
Fully developed fire in a room
At least 60kW/m2
Products similar to those of class A1, including small amounts of organic compounds
B
Very limited contribution to fire
Single burning item in a room
40kW/m2 on a limited area
Gypsum boards with different (thin) surface linings. Fire retardant wood-based panel products
C
Limited contribution to fire
Single burning item in a room
40kW/m2 on a limited area
Phenolic foam, gypsum boards with different surface linings. Flame retardant wood-based panel products (thicker than in class B)
D
Acceptable contribution to fire
Single burning item in a room
40kW/m2 on a limited area
Wood-based panel products with thickness > about 10mm and density > about 400kg/m3 (depending on end use)
E
Acceptable contribution to fire
Small flame attack
Flame height 20mm
Low density fibreboard, plastic based insulation products
F
No performance requirements
Small flame attack
Flame height 20mm
Products not tested (no requirements)
Size
9mm
12mm
2400mm x 1200mm
Want to know more about Multi-Rend? Simply fill out our Quick enquiry form or call us on 01422 330 444