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Typical U Values for Walls

typical u values for walls

U Values are used to measure how efficient certain elements of a building are as an insulator. For example, a double-glazed window will have a U value, and so will your loft insulation. It provides an indicator as to how effective each element is at preventing heat transmission between the outside and inside of a property.

Typical U values for walls, windows and rooftop insulating materials vary from product to product. In broad terms, the lower the U value, the better, it is materials with lower U values limit heat transmission, and, therefore, you are likely to require less energy to heat your home as a result.

Performance measures, such as U values, are becoming ever more important as energy prices continue to increase, and building regulations unremittingly require higher insulating qualities.

This has created changes in the way we think about designing and constructing our properties in terms of materials, structure and fabrication.

typical u values for walls

Remember, as mentioned above, lower U values should mean higher resistance to thermal bridging. As you can see, on their own without added insulation, cavity walls have a better U value than solid walls

Typical U Values for Walls

Below are the typical U values you’d expect to measure within a solid wall, an uninsulated cavity wall, and an externally insulated wall of any kind. This process uses W/m²K as units of measurement.

Remember, as mentioned above, lower U values should mean higher resistance to thermal bridging. As you can see, on their own without added insulation, cavity walls have a better U value than solid walls.

  • Cavity wall (no insulation) 1.5 W/m²K
  • Solid brick wall (no insulation) 2 W/m²K
  • Insulated wall 0.18 W/m²K

Why is this so? Because cavity walls have a gap between the inner and outer shell of brickwork that acts as an insulator.

Heat does not travel across dry air as effectively as it does across a material. A solid wall does not contain this gap, and is made up of only one layer of brickwork.

Regardless of the type of wall you have in your home, you can clearly see that an insulated wall offers a much better U value – dropping way below 1 W/ m²K.

typical u values for walls

By protecting your exterior, you prevent inclement climatic conditions from entering your home, and the heat from your radiators escaping!

Forget Your U Value – Go External!

If you have a cavity wall structure around your house, and you’re thinking of installing cavity wall insulation, you may be concerned about the U value of your material of choice.

This is also true for internal insulation methods for solid walls – as cavity wall insulation is not an option here.

You want the best U value measurement possible from your material of choice, so that you are satisfied your property isn’t losing too much heat.

What we say is – forget material U values! That’s right, forget them! This measurement does not take into account moisture, steam, high winds or any other type of weather condition.

U value tests are conducted in laboratories and in calm environments, so they do not consider rainfall or blistering winds – which doesn’t help if you live in an exposed area, where the onslaught of the elements tests structural integrity to the max!

Instead, opt for external wall insulation as this will prevent heat loss, moisture gain and thermal bridging between the inside and outside of your home all-together.

By protecting your exterior, you prevent inclement climatic conditions from entering your home, and the heat from your radiators escaping.

This will bring the typical U values for walls in your home down to around 0.1 W/m²K. Job done!

typical u values for walls

It then sinks into your masonry by as much as 17mm to provide an effective barrier against heat loss and moisture gain. Rainwater simply bounces off the brickwork, leaving it completely dry, and resistant to thermal bridging

An Effective Barrier with Home Logic Wall Insulation

Home Logic Wall Insulation will provide the effective barrier you are looking for. Typical U values for walls in your property will plummet with the application of this revolutionary product. We spray or paint this transparent material directly onto the surface of your exterior brickwork.

It then sinks into your masonry by as much as 17mm to provide an effective barrier against heat loss and moisture gain. Rainwater simply bounces off the brickwork, leaving it completely dry, and resistant to thermal bridging.

This is a much more effective solution to cavity wall insulation as it prevents moisture from entering the building, and potentially ‘crossing the gap’ through your choice of cavity insulator.

Applying Home Logic Wall Insulation will prevent water-absorption by over 95%!

Obtain a no-obligation free quote today to find out the typical U values for walls within your home and how we can go about improving them!

Intrigued? Talk To Our Team Today!

If you would like some more information on the U values we can help your property achieve – give us a call on 0800 1700 636. Otherwise, send an email to survey@homelogic.co.uk and we will get back to you as soon as possible!