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How do extra internal doors increase energy efficiency?

An extra internal door adds a new layer that works to block out the cold. This helps keep your home warmer, makes it more energy-efficient, and lowers your heating bills.

Average installation time:

2 days

The cost to install extra internal doors can vary and is based on a few factors:

  • The type of door you choose.

  • The materials used.

  • The size of the door.


Typically, a new internal door can cost between £25 and £150. The cost to install this ranges from £100 to £350. 


(Based on August 2024 costs).

Energy efficiency:

Adding an extra internal door is a great way to make it more energy-efficient. 


Draughty front doors let around 15% of your home’s heat escape. An extra door can help you:


  • Keep your home warmer.

  • Save money on your heating bills.

  • Protect the environment by lowering your carbon footprint.

Approximate cost saving:

How much you can save will depend on:


  • The size of your home.

  • The door you are replacing.

  • Your energy prices.


The average UK home can save around £35 per year with an extra door.


(Energy Saving Trust. based on insulating a gas-heated home, 2024 fuel prices).

Are extra internal doors right for my house?

If you have enough space behind your front door, adding an extra internal door could be a good choice. This helps to create a barrier from the cold, keeping the heat inside your home.

FAQ's - Extra Internal Doors

Adding extra internal doors can help keep your home warmer. It’s like adding an extra layer to your home. These doors go behind your external door to help keep the heat in. The result? You use less energy to keep your home comfortable.

Our advisers can help you find the best internal door for your home. They can also advise you on financial support and connect you with suppliers to get it installed.

Can extra internal doors make my home warmer?

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Use our free Virtual Plan Builder to get ideas about energy efficiency, products, and associated costs.

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Extra internal doors explained

Reduce draughts and heat loss.

Lower your energy bills.

Enjoy a warmer home in winter.

How do extra internal doors work?

When you put another door behind your regular outside door, it helps keep the heat in and the cold out. An extra door helps your home stay warm and cosy, even when it's really cold outside. This means you don’t need to use as much energy to heat your home and you'll save money on your bills.

What do extra internal doors look like and where do they fit in your house?

An extra internal door looks like a regular door you see inside your house. This new door is installed behind your outside door.

This might create a new, small space in your home. Many people like to use this as an inside porch to store shoes, coats and other belongings.

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More information

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Finding the right partners to make energy-efficient changes to our home was so important.



Andrew, Fishergate

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Extra internal doors

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Our case studies are real-life scenarios of York residents who have recently installed energy-efficient solutions in their homes. They have since become our Community Energy Champions, and you will be able to connect with them if you decide to use YorEnergy on your own journey towards energy efficiency!

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