Converting your garage: Insulation

Insulation is a very important aspect of any garage conversion, a number of building regulations apply to insulation, regardless of the purpose of the room. Please find below general advice on insulation building regulations and a few tips on insulation requirements for your conversion. Please note: this guide is not exhaustive, if you have any questions about insulation relating to your specific project you should seek professional advice before commencing with any work.

Building regulations for garage conversion insulation

When you are converting your garage, it may be necessary to insulate any external walls, roofing and flooring. By doing so, you can ensure that the area is deemed as being suitable and in adherence to building regulation habitable standards. Here are the current insulation guidelines;

  • New windows need to achieve a U Value of at least 2.0W/m2K for PVC or timber frames and 2.2W/m2K for metal frames. Usually, this can be achieved using a sealed double glazed unit and incorporating a 16mm air gap and inner pane of low-E type glass.
  • Walls need to achieve a U Value of approximately 0.35W/m2K. This can normally be achieved by dry lining the wall. However, the performance of individual insulation methods will differ.
  • Floors need to achieve a U Value of approximately 0.25W/m2K. This can normally be achieved using 100mm of polystyrene floor insulation.
  • The roof will need to achieve a U Value of approximately 0.25W/m2K for a flat roof or 0.16W/m2K where a loft space is apparent.

Insulation requirements

As well as adhering to the above building regulation standards, you may need to add additional insulation to your walls, floor or roof, depending on the function of the room. For example; bedrooms, home offices, study areas and playrooms may need extra insulation, especially during winter months. By including extra insulation in your garage conversion, you could also reduce your ongoing heating costs. When done correctly, insulation methods can be sufficient on their own to keep an area warm – additional heating sources such as radiators or stand alone heaters may not be required – especially during the summer.

Certainly, the amount of insulation work that you can complete will largely depend on the size and type of your garage and any budget requirements that you have i.e. double or tandem garages will require more insulation than single garages. Your location will also be a key factor – colder areas will naturally require more insulation. There are also a number of insulation techniques available – especially in the case of cavity walls, where wool fibre or beading insulation materials can be used.

If you are not sure as to the best insulation material and methods to use in your conversion, it's a good idea to perform a little research or seek advice from an experienced professional. Incorrect insulation methods can lead to damp problems or leaks – and in many cases this can mean that the insulation needs re-doing at a later stage. This can be an expensive and time-consuming process so should be avoided by getting the initial insulation process done correctly.

Quick Quote...

Free Quotes