Archive for Building Regs Part L1B

Can I trust the Builder to do a proper insulation job ?

Can I trust the Builder to do a proper insulation job ?

When it comes to External Wall Insulation systems there are very strict procedures in place to ensure the homeowner is protected against poor workmanship and poor materials. The Building Regs and the  Inspector from Building Control will ensure the system being fitted has been independantly tested and accredited as fit for purpose and that the contractor is qualified to install the system .

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Why do I need Building Regs Approval ?

Under the Building Regs Part L1B 2010 you cannot replace or add a wall covering – apart from paint – to any solid wall without incorporating insulation to save energy and reduce heating costs . This applies to any internal wall renovation or external rendering of the wall and covers things like replacing or adding render,plaster or cladding and applies if you are working on at least 50% of an individual wall’s surface area. Mistakenly some people assume it has to be 50% of the whole house before you need to insulate but it is 50% of each individual wall.

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Serving a Building Notice to Building Control

As from 1st October 2010 it is now compulsory to incorporate wall insulation when adding a new layer to an existing solid wall or replacing an existing layer.

This applies to internally removing plaster from the walls or rendering/cladding an external wall that is currently not covered or has a covering that needs replacing.

The Regulations that govern these actions come under Part L1B of the Building Regulations for England and Wales and they lay down a range of target thermal values to achieve when carrying out any renovation or building work to a solid wall, a floor or a roof.

The responsibilty for complying with these rules lies with the architect, builder/installer and also the home-owner and any avoidance can lead to financial and retrospective penalties on all of the above parties. This is not a Planning Permission issue in that you simply notify the Council you will be having work done and that it will comply with the rules.

The process for complying with the Building Regs starts with a Building Notice application to your local Council’s Building Control and these are very helpful in answering any questions.

After paying a small fee the Building Inspector will arrange with your builder to come out and visit site at various stages of the work to ensure it is done correctly. At a successful completion of work an Approval Certificate is issued which must be kept with your house documents.

To find your local Building Control click Part L1B

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Wall Insulation Building Regs Part L

As from October 1st 2010 there is a new amended section to Part L of the Building Regs that has serious repercussions for both homeowners and builders/applicators involved in any external wall renovation or coating work.

If a property has solid walls or a very narrow cavity then wall insulation must be fitted if more than 50% of any individual wall has a cladding or render applied for the first time or has an existing covering removed or replaced.

With most properties it is usually impractical to have internal insulation due to the disruption, need for redecoration and reduction in room sizes . The easier and more effective route to take is to have wall insulation fitted to the outside face of the walls and then have it rendered or bricked over.

The local Building Inspector will need to visit the job on several occasions to check up and sign off the work and ideally the insulation should give a thermal U value of 0.3 . This will generally involve fitting a system of 70mm thickness to the wall where possible given the building’s design and architectural features.

For more information on the implications of Building Regs or to find out more about the benefits of external wall insulation CALL NOW on 0800 975 5231 or email building regs for insulation

Posted in: Building Regs Part L1B

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