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BCA Calls for Thermal Break in Steel-Framed Construction

BCA Calls for Thermal Break in Steel-Framed Construction

Many practitioners are unaware of the NCC’s BCA requirement1 for an R0.2 thermal break between the cladding and the steel frame in steel-framed constructions. A thermal break is designed to reduce significant energy loss, which can occur due to conductivity between insulated and non-insulated building elements. While some builders opt to use a 12mm polystyrene strip or 20mm timber batten or thermal break tape, such solutions still require separate vapour barriers or vapour-permeable wraps, depending on local conditions.

Superior insulation products are more than simple heat barriers – they are complex thermal management systems designed to complement specific building materials and structural configurations, as well as local climatic conditions.
Choosing the right insulation is fundamental to the hygiene, integrity and thermal efficiency of a building, taking account of issues like condensation, thermal bridging and thermal breaks.

A deficiency in any one of the above areas can lead to reduced insulation performance, as well as unwanted moisture build-up or significant energy wastage.

Kingspan Insulation products, including Kingspan AIR-CELL Permishield® and Kingspan AIR-CELL Insulbreak®, have been designed to suit different types of construction.

Both Insulbreak® and Permishield® provide all-in-one insulation wrap and thermal break solutions which do away with the extra cost and labour of installing a separate thermal break strip, saving time and materials on site.

Kingspan AIR-CELL Permishield®
Ideal for applications involving steel-framed walls and cladding products that require vapour-permeable wraps to be installed behind them, Kingspan AIR-CELL Permishield® is a ‘3 in 1’ product offering insulation, thermal break protection and vapour-permeable sarking.

While many vapour-permeable insulating products feature diminished R-values as a trade-off for moisture permeability,Permishield® achieves high-performance R-values while still providing premium moisture control. This is accomplished using a thermo-reflective insulation with a core of physically cross-linked, closed-cell foam.

This flexible core is sandwiched between anti-glare foil on one side and plain foil on the reverse side to offer space-efficient, long-term performance.

Permishield® is CodeMark certified and is ideal for wall applications involving lightweight cladding materials that require vapour permeability.

Kingspan AIR-CELL Insulbreak®
This product is a ‘3 in 1’ insulation, thermal break and vapour barrier, designed to present a high-performance insulation solution for high-quality steel-framed constructions that require high vapour impermeability.

Kingspan AIR-CELL Insulbreak® provides the necessary thermal break between building elements using an easy-to-install, fibre-free foam between interlayers of reflective foil. With its thin profile and continuous rollout form, Insulbreak® has the added advantage of maximising design flexibility.

Insulbreak® is CodeMark certified.

1. NCC BCA Vol. 1 Section J1.5c, Vol. 2 3.12.1.4b.

About Kingspan Insulation

Kingspan Insulation is a market leading manufacturer of innovative ultra-thin flexible insulation products and super high performance rigid insulation products for building fabric and building services applications.