The energy efficiency of a home depends on many factors. One primary reason why homes lose much of the heat during winter and consume more energy than needed is insufficient insulation. All areas where heat escapes easily must have proper insulation so that most of the heat is retained inside even if you already turn off the heater. Unfortunately, not all homes give focus on areas such as the loft. Insulating the loft greatly improves the energy efficiency of a home.

Insulating the loft of any home must be done with care. There are many problems that may be encountered when adding an insulation layer. Pipes and wiring can be damaged in the process. Additionally, adding loft insulation should also entail that all light fixtures, especially recessed downlights either have loft caps (shown below) - or are insulation coverable as standard.

Loft Lid Downlight Protector

Why downlights need loft caps

Thermal insulation can be optimised if all downlights are properly covered. Downlight holes can act like a chimney where heat is drawn out from below and brought into the cold space above. But putting direct insulation over downlights is not the best solution. Insulation material can become a fire hazard due to the heat that escapes from the downlight hole. Instead of direct insulation, loft caps for downlights are used instead. The loft cap will serve as a barrier between the downlight and thermal insulation. Once the loft cap is installed, it is then safe to add an insulation layer over it.

Loft lid with Insulation all around the downlight

Loft caps can be used with either fire or non-fire rated downlights. Some caps will provide fire protection to a non-fire rated downlight, if they're made with intumescent material which will eventually swell up and cover the hole in case of fire...But not all loft caps are fire rated, so be careful to check the specifications.

If you are looking for a versatile loft cap that will fit a range of downlights, you can opt for the Hellermann Tyton universal insulation cover cap called SpotClip. This is a cost-effective option but it doesn’t come with fire protection. It can be used with integrated LED downlights or GU10 downlights.

Cost effective design

Another alternative product offered by Downlights Direct, the Hellermann Tyton has the following specifications:

  • This is a universal insulation cover cap that comes in 3 sizes.
  • It can be retrofitted from the room below where the downlight is installed.
  • It is suitable for downlight hole diameters from a minimum of 62mm to a maximum of 160mm.
  • It is made of polyamide and reinforced with fiberglass.
  • The operating temperature is between a range of -20 to +120 degrees C.
Hellermann Spot Clip
Hellermann Spot Clips

These products offered by Downlights Direct are some of the best options for adding a layer of protection over downlights before or after insulation is installed.

What are some of the best downlight options?

For someone who is going to install a new downlight lighting system, you have the choice of installing a downlight that is insulation insulation coverable. This is a much better option because you don’t have to spend extra on adding loft caps later on. One example is the Aurora EFD Pro series which is a fire rated GU10 downlight that is approved to be insulation covered when you use a GU10 LED. There are also integrated LED downlights that have an insulation cover cap (or airflow cap) fitted on top such as the JCC V50 (shown below).


There are some people who question whether a loft cap is still necessary when you are using LED downlights. While LED lights are known to emit very little heat, if the downlight isn't classed as being insulation coverable, then you'll need to use a loft cap or choose a downlight that is insulation coverable.

The following two tabs change content below.