Do you stick radiator foil to the wall or radiator?

Author: Aiyana Maggio  |  Last update: Friday, June 26, 2026

Slide the foil down the back of the radiator and stick it to the wall, making sure the shiny side of the foil faces the room.

Can radiator foil touch the radiator?

If the installed sheet does touch the wall or the radiator in a few places, that will not make any material difference to its effectiveness. The optimum air gap is approximately 25mm.

Where is the best place to install a radiator reflector?

Radiator foils reflect radiant heat back into the room. They help to reduce energy loss and save you money on your annual fuel bill. Rooms may feel warmer after installing these foils so you could always turn down the thermostatic radiator valves. Only install this product behind radiators located on an OUTSIDE WALL.

Why is foil not fitted behind radiators on internal walls?

Kitchen (aluminium) foil is not ideal because once the sheet is unrolled and exposed to the air the aluminium quickly develops a tenacious oxide coating that dulls the surface, meaning the radiant heat from the radiator will not be reflected as efficiently.

Do you need to stick radiator foil to wall?

Slide the foil down the back of the radiator and stick it to the wall, making sure the shiny side of the foil faces the room.

#DIY- How Do You Install A Radiator Reflector Foil? - Do It Yourself - Orange Packaging

What are the disadvantages of foil behind radiators?

Tinfoil isn't rigid enough to slide easily behind any radiators so you would need to remove them from the wall to get tinfoil installed. Also, tinfoil creases very easily and it looks terrible. So if the radiator is in an area where it is seen you want something more aesthetically pleasing.

How efficient is radiator reflector foil?

Radiator foil, offered by Orange Packaging, provides premium insulation that reflects up to 95% of heat back into the room. These reflectors are not only efficient but also easy to install, durable, and inexpensive.

Where is the best radiator positioning?

The best position for radiators is the coldest area of your chosen room. This will often be beneath a window or close to an entrance door.

Does putting silver foil behind radiators work?

Placing foil behind radiators can reflect heat into living spaces, potentially saving on heating bills, especially effective on external walls. However, kitchen foil isn't ideal as it degrades and crinkles over time. Specialized radiator reflectors like Radflek are more durable and effective.

Is it less worthwhile to fit foil behind radiators if the house already has cavity wall insulation?

However, the Energy Saving Trust says that foil behind radiators is not worth doing if you already have cavity wall insulation.

How thick should radiator foil be?

The size of this product is 0.6m x 5m and 3mm thickness. It can meet the needs of most radiators, and the high-quality reflective insulation effect can maximize energy efficiency. Mesure your radiator and your foil. Cut the foil according to handles of the radiator.

Should a radiator be touching the wall?

A radiator should be positioned 2cm or more away from a wall.

How to attach reflective insulation?

Roll out the product across the top of the trusses, pull tight and staple at approximately 4” intervals. Run subsequent courses of the product with the 3/4” staple tabs overlapping at the seams. Tape the seams with a Reflectix® Foil Tape (goal is an air-tight, snug seam seal). Install purlins over the insulation.

Which radiator reflector is best?

Radflek is also the most efficient radiator reflector approved by Ofgem (The UK's energy industry regulator) for its Carbon Emissions Reduction Target scheme (CERT). A sheet of Radflek will save an average of 8.9 kg CO2 and up to 83 kWh of energy per year.

Do radiator covers reduce efficiency?

If designed well with plenty of space for the warm air to travel through, a radiator cover shouldn't reduce the efficiency of a radiator and could even improve it if the cover has a reflective backing. However, a poorly designed radiator cover will trap heat and increase your energy bills.

Where should you not put a radiator?

With so many different-sized radiators now available, there are likely to be several possible places where you could put your radiators. We recommend however that nothing is positioned above the radiator and that 100mm below should be left clear so heat from the radiator can be effectively distributed.

Why are radiators under windows?

This is something most of us learn in school and it helps to explain why radiators are located underneath windows. As the hot air rises from the radiator, the cold air that is coming in through the window pushes against the warm air, circulating it around the room much more efficiently.

Does radiator placement matter?

You need to remember that the position of a radiator affects its efficiency. The best place for a radiator is in the coldest part of the room. This used to be under windows. However, in more modern double-glazed homes, there may not be a cold area, so you can put radiators where they won't affect the use of walls.

Does radiator foil work on internal walls?

Radiator foil insulation is necessary especially for external walls, rather than for internal and party walls. They are basically sheets of materials usually made of metal (commonly aluminium) or a foil-wrapped slimline board. They are highly effective in saving homeowners money and reducing energy bills.

How much does foil behind radiators save?

For a typical household, an 8-sheet pack of Radflek will annually save you up to 71kg of CO2. A single sheet of Radflek will save you 8.9kg of CO2 per year or up to 83 kWh of energy per year.

What is the best thing to put behind a radiator to reflect heat?

Radiator foil and radiator heat reflector foil are essential materials for improving energy efficiency in homes. Designed to reduce heat losses by reflecting heat back into the room, these foils are highly effective when placed behind radiators.

What kind of foil to use behind radiators?

Reflective radiator foil is an economical solution to prevent heat loss and the installation is quick and simple. If you're looking for the most effective radiator reflector on the market, here we offer a range of radiator foils that will help you to reduce heat loss and cut your heating bills.

Do magnetic radiator reflectors work?

Tests conducted by Sheffield University have shown warmroom can reduce the heat lost through walls by up to 60% whilst simultaneously lowering carbon emissions by 19kg/m² per year.

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