Minimum Order Quantity: 5 items
Unilin CavityTherm is a high-performance, continuous wall insulation system that delivers excellent thermal performance and built-in protection from wind-driven rain.
It features enhanced PIR with a lambda value of 0.021 W/mK, suitable for full-fill cavity wall applications.
The pack covers 2.16m² and includes gas-tight facings with a profiled HIPS skin, providing a drainage plane.
Key Features:
- Engineered HIPS facer for wind-driven rain protection
- Moisture redirected to the outer surface
- Prepositioned slots for sloping wall ties, preventing creep
- Fully engineered jointing for continuous insulation
- Full range of accessory pieces to complete the system
- Excellent thermal bridging performance
- No need for engineer's report
- Achieves ultimate U-values and meets standards
Performance and Benefits
Unilin CavityTherm offers a continuous insulation layer, reducing heat loss without the need for an engineer's report.
It meets Passive House standards for Ireland and is suitable for traditional wall constructions with minimal cavity width requirements.
The engineered profiled facing directs any moisture down to the outer leaf, providing additional wind-driven rain protection.
The rebated edges allow the system to tightly interlock, ensuring excellent thermal bridging.
Typical Physical Characteristics:
- Density: 30 kg/m³
- Compressive Strength: >100 kPa @ 10%
- Thermal Conductivity: 0.021 W/mK
- Service Temperature: -20°C to +100°C
The system also features a specially designed profile to maintain a residual channel, ensuring water is redirected, and wall ties are sloped to avoid water travel.
This unique feature protects the structure while achieving the desired U-values and low carbon targets.
Frequently Asked Questions:
What is CavityTherm?
CavityTherm is a high-performance composite insulation board with PIR core and a lambda value of 0.021 W/mK.
Its profiled facing directs moisture to the outer leaf, and its interlocking design ensures a continuous insulation layer.
What is the real benefit of using CavityTherm?
CavityTherm helps achieve Passive House standards, providing an affordable solution for low-energy designs while ensuring accurate, continuous insulation during installation.
What wall ties do I use with CavityTherm?
Standard S/S wire wall ties, up to 5 ties/m², can be used.
For wider cavities, low conductivity ties should be considered.
Why slope the wall ties down to the outer face?
Wall ties should slope slightly to prevent water travel along the ties into the construction.
What thicknesses of CavityTherm are available?
CavityTherm is available in 100mm, 125mm, and 150mm cavities, achieving U-values as low as 0.12 W/m²·K.
What building types can use CavityTherm?
CavityTherm is suitable for new external masonry cavity walls up to 25m in height in both domestic and non-domestic buildings.
What are the accessory pieces for?
Accessories help ensure airtightness and thermal bridging are addressed, providing insulation around services like meter boxes and corner details.
How do you detail insulation around stepped cavity trays, vents, or meter boxes?
Unilin offers bespoke insulated pieces to avoid thermal bridging in these areas.
Is there a benefit in the ‘Engineered edge detail’?
The engineered jointing system ensures continuity and helps avoid the 0.01 U-value penalty when calculating according to BR443.
When a board is cut, what tape should be used to make the join?
Sealed joints should use waterproof tape for internal applications and a self-adhesive jointing strip for external ones.
What is a ‘Cavity Board’?
A cavity board is recommended to cover the insulation during construction to catch mortar drops.
Delivery Information:
Note:
Delivery of this bulky product is available Nationwide but will be subject to a bulk delivery charge.
Delivery charges are calculated during checkout according to the delivery address provided.
Should you require very large volumes of this product then we may be able to improve your delivery charge.
To discuss this you can call us on 0818 888 000 for more information and to confirm pricing.
