Garage Conversions UK

 

The online place for homeowners considering converting their garage to a habitable living room.

 
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Garage Conversions - The Economical way for UK Home Owners to add a new habitable room to their property.
 
Notes about Planning and Building Regulations
 
A Garage Conversion does not involve a change of use as such and UK Building Regulations will therefore only apply to the structural alterations involved and to any other building controlled works such as drainage.

On many occasions a Garage Conversion requires little more than the infilling of the existing garage doorway with a suitable construction. This most often is largely made up of a window. Any infill will need to be supported by either foundations or suitable lintels. This is a structural alteration and as such requires building regulation approval.

In particular care should be taken to ensure that suitable damp proof courses are incorporated to prevent water ingress at the new window reveals and where the new infill abuts the existing walls.

In some cases the garage already has cavity walling and the works are therefore substantially reduced. If however the existing garage has single leaf masonry walls with piers there will be additional work to try to improve both thermal insulation and weather resistance.

This can be achieved by building new internal block work walls, but these will need support and it cannot be assumed that the existing floor will be adequate to support the extra load. If this is the case it may be necessary to excavate new foundations, or expose the existing ones, to ensure proper support to the block work.

To avoid problems it is common to provide an internal insulated stud wall. If this is to be adopted it is worth considering prefabricating the stud walls in panels to enable a breather membrane and vapour barrier to be incorporated. In addition the piers can be weathered and insulated to reduce cold spots being formed

 
Other points that need consideration reference building regulations are:
 

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The window may need to be suitable for means of escape if the room formed is an inner room.

There should be reasonable levels of ventilation

Any drainage will need to be considered e.g. is WC or shower proposed?

If the roof is being insulated consideration should be given to venting the roof void.

   
Insulation
 

It may be necessary to insulate the walls and roof to habitable room standards. The wall insulation thermal performance ‘U’ value should be equal to 0.35 W/m2K, flat roofs to 0.25 W/m2K and pitched roof to 0.2 W/m2K. The ground floor should achieve a thermal performance ‘U’ value of 0.25 W/m2K. Examples of the types of construction that satisfy the standards can be found in the guidance notes on complying with Part L of the Building Regulations.

 
Windows and ventilation
 

Windows must achieve a thermal performance ‘U’ value of 2 W/m2K and should incorporate openable vents of an area equal to 1/20th of the floor area of the room. In addition, background ‘trickle’ vents, having a free vent area of 8,000mm2 are required.

 
Disclaimer: The above is just a general guide. The building Control Department should be consulted by the
homeowner or their agent / contractor for more specific local information.
 
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Our Address:

Quotatis Ltd
Suite 1, Joseph King House, Abbey Farm Commercial Park, Horsham St Faith, Norwich, NR10 3JU
Tel: 08448 044 344 - International: +44 1603 899910 - Fax: 01603 899919
Registered in England 05643725

Registered in England 05643725
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Garage Conversions UK - Providing you with information, advice and garage conversion quote requests.

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Garage Conversions UK - The online place for homeowners considering converting their garage to a habitable living room

Garage Conversions - Perhaps the easiest way to a new room to your home