Redstone Clima Redboard Pro
Product Overview
Main purpose
High performance thermal insulation that provides a more comfortable indoor climate. Manages moisture, regulates humidity, eliminates mould and minimises heat-loss; especially in older or historic buildings or newer buildings suffering condensation and mould problems.
Use it on
Interior side of external solid stone or masonry walls, solid concrete walls or ceilings and waterproofed basements with a cement based tanking system.
Overview
Clima Redboard Pro is a remarkable absorbent and dehumidifying insulation material capable of absorbing up to 4.7 times its own weight of water. It is capillary active and hygroscopic making it the best insulation available for dealing with peaks in humidity or moisture and penetrating damp from rain. Clima Redboard Pro is made from a mixture of lime and sand (calcium silicate), making it a natural and extremely effective mould inhibitor. It is suitable for use on solid (single leaf) walls in older buildings or any building that has condensation or mould issues.
Features
- Capillary Active and Breathable
- Made from lime and sand
- Natural mould inhibitor
- Ideal internal insulator for Listed or historic buildings
- Ideal internal insulator for commercial and domestic refurbishments
- Excellent natural thermal insulation
- Non-combustible (A1 Fire rating)
- Lightweight, easy to cut, shape and install
Benefits
- Ideal for preventing structural damage from wind driven rain by absorbing moisture and regulating dampness in walls.
- Allows moisture to actively move through the wall and rapidly evaporate helping it dry out faster and more easily.
- Twice as breathable as lime plaster, it is ideal for use on existing breathable walls and materials.
- Contains lime which is toxic to mould.
- Helps improve indoor air quality creating a healthy living environment for respiratory disease sufferers by eliminating mould.
- Significantly improves thermal performance of the wall; 30mm of climate board can reduce heat loss by 50%.
- Provides exceptional thermal insulation to reduce energy costs without changing the external appearance of the building.
- Extensively used on historic buildings throughout Ireland, UK and Europe including the Rijksmuseum in Amsterdam.
- Being lime based, the Clima Redboard System is fully compatible with traditional materials used in heritage buildings.
- Non-combustible insulation provides the highest level of fire safety for the building to meet all fire regulations.
- Ideal solution for thermal bridges at windows, doors and between joists within a separating floor.
Questions
Is this the same as Calsitherm?
Technical Details
Key Technical Data
Installation Guide

How to Install
Clima Redboard Pro should be installed on to a level surface where all gypsum plaster has been removed. Any firmly attached cement or lime based plaster may remain in place. All non-breathable paint and wallpaper must be removed prior to application. If the wall is uneven, use a lime based plaster or Diathonite (for additional insulation) to level it before installing Clima Redboard Pro. Any mould on the stone/brick should be cleaned off before applying the levelling coat.


Wherever the climate board will meet a concrete or wooden floor, windows or any area that may be exposed to structural movement, Pro Clima Contega Fiden Exo expanding gap sealing tape should be installed between the climate board and the other surface, prior to applying the board.
Apply Clima Redboard Pro Adhesive Mortar to the wall with a 5-8mm comb/serrated trowel then apply the boards tightly together in staggered rows. For optimum performance, the board must be completely bonded to the wall with no air pockets behind. Adhesive mortar is not required between the edges of boards when they are installed without gaps (butt-jointed).


Clima Redboard Pro should be finished with a layer of Clima Redboard Pro Finishing Plaster (Luno Kalkglätte), then Clima Redboard Pro Reinforcing Mesh, then a second coat of Finishing Plaster. In corners, mesh must be used and it must overlap each adjacent wall. In order to optimise the performance of the Clima Redboard Pro, the final top layer should be a breathable paint such as Auro natural paint.
Ceramic Tiling on top of Clima Redboard Pro
If you wish to use ceramic tiles on the wall, at least one-third of the area insulated with Clima Redboard Pro must be left un-tiled so the system can continue to work effectively. Wallpaper is not suitable for use over Clima Redboard Pro boards.
In bathrooms/wet rooms on walls outside shower area:
- Apply first layer of Luno Kalkglätte (Luno Smooth Finishing Plaster) with the Reinforcing Mesh
- Then apply 4 insulation fixings per m2 to ensure the boards are bonded and mechanically fastened to the wall. Redstone recommend the Fischer TermoZ CN 8 or similar approved.
- Then apply the second layer of Luno Kalkglätte (Luno Smooth Finishing Plaster)
- Following this the tile adhesive and tiles may be applied.
In bathrooms/wet rooms on walls inside an enclosed shower/bath area:
- Apply first layer of Luno Kalkglätte (Luno Smooth Finishing Plaster) with the Reinforcing Mesh
- Then apply 4 insulation fixings per m2 to ensure the boards are bonded and mechanically fastened to the wall. Redstone recommend the Fischer TermoZ CN 8 or similar approved.
- Apply a waterproofing system such as the following: Sopro AEB 640: AEB® waterproofing and separating membrane
- For detailed application instructions for the waterproofing system specifiers must refer to the manufacturers technical datasheet e.g. Sopro AEB 640 (how to apply a suitable tile adhesive to their system)
- The tiles now can be applied directly on the AEB 640