How Does Reflective Foil Insulation Work?

Low-E Insulation stops heat, deadens sound and won’t absorb moisture. The unique design of Low-E Insulation allows it to resist all 3 forms of heat loss and provide maximum thermal performance while also resisting moisture absorption, stopping draughts and uncontrolled air movement, and deadening sound. Low-E is a very simple, very effective insulation material. It just so happens that is it also easy to work with, made from recycled material, safe to handle, has no airborne fibers to worry about, is class 1 fire rated and can be used virtually anywhere!

History of Reflective Insulation

Reflective insulation is very simple and very effective but it’s not a new idea, and although reflective insulation was re-popularized by the space industry, it is not ‘space aged’ either. In fact, reflective insulation in one form or another has been around for centuries.

Three Types of Heat Loss

The unique composition of Low-E Insulation means that it can successfully tackle all three forms of heat loss. Low-E Insulation is made from pure aluminium which reflects 97% of radiant heat away from the surface and back to the heat source, while our recycled closed cell foam provides a thermal break to reduce and stop conduction and convection


You may have heard of low ‘E’ glass. Well, the ‘E’ stands for Emissivity. And Low-E Insulation works the exact same way. Emissivity is the ability to transmit or transfer radiant heat through the surface of a material.

Airspaces and R-values

Foil insulation products can work without an airspace but to declare what is called an “R-value”, you must install foil insulation with an airspace. Airspaces can be forms in numerous ways and can be as small as a couple of millimetres but airspaces beside a low emissivity surface are most efficient between 6mm – 20mm.

Moisture Control

Warm air carries more moisture than cold air. When warm air cools, the moisture gets left behind. To optimise performance in both new build and refurbished buildings, it is always advisable to install a vapour control layer within a modern building envelope.

Air Tightness

It is now widely accepted that air-tightness is one of the most important parts of building design and there is little point in improving insulation standards, unless also addressing the levels of uncontrolled air movement.


Low-E Insulation can be installed on its own or teamed with a secondary insulation to meet higher R-value standards. It is not meant to replace ALL the insulations on the market. Low-E Insulation is designed to increase thermal performance and airtightness, reduce condensation risks and life-cycle running costs, and most importantly, to tackle issues which have been previously unaddressed by bulkier traditional insulation products.

How Does It Work?

Learn how reflective insulation works

Why Choose Low-E?

The worlds favourite reflective insulation

Where To Buy Low-E?

Buy online or find a local supplier

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