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The Building Regulations

The

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Before you carry out any structural work,  or  construct a new extension  or  loft conversion, you must first ensure it all complies with Building Regs. 

Typical examples of  works requiring consent are:-

Alterations to drainage,  strengthening roof structures,  removal of chimney breasts, fitting roof windows,  and demolishing or making new openings in walls. Some works added recently to the list are: constructing conservatories, fitting replacement windows, and even some electrical alterations.

The Building Regulations are grouped into  ’approved documents'  (A to P) according to subject.

Architects and Chartered Surveyors base their designs around these requirements. The normal procedure is to produce drawings

( typically 1:50 or 1:100 scale) of the proposed works and submit them to your local council Building Control Department, where they will be checked for compliance.

For larger projects you may be asked to obtain structural engineer’s calculations, so the Council can be sure the loads are adequately supported.

some typical Local Authority BC guidance notes

How to make An Application: Useful advice from Wigan Council B.Control

 

 


 

Summary of U-value Requirements

 

U- values for extending buildings

Element

2010 Part L

Wall

0.28

Floor

0.22

Flat roof

0.18

Pitched roof (warm)

0.18

Pitched roof (cold)

0.16

Doors

1.8

Windows & rooflights

1.6 or WER Band C

 

U-values for renovating buildings

Element

Threshold

2010 Part L

 

 

 

Floor

0.35

0.25

Wall

0.70

0.30

Pitched roof

0.35

0.18

Flat roof

0.35

0.18

 

 

 

 

Renovation of thermal elements

Replacing the covering on a flat roof now triggers the requirement to upgrade insulation ( to 0.18)

The ‘trigger values’ are now 50% of area of the element being renovated (was 25%)  or 25% of the total building envelope.

e.g. if removing plaster from a bedroom wall, the relevant area = the external wall in the room – not the area of the whole main wall.

 

 


 

Download  BUILDING  REGS  DOCUMENTS  here

         Part A:      Structure

        Part B:      Fire safety

        Part C:      Site preparation and resistance to moisture

   

        Part D:      Toxic substances

        Part E:      Resistance to the passage of sound

        Part F:      Ventilation

        Part G:      Hygiene

        Part H:      Drainage and waste disposal

        Part J:      Combustion appliances and fuel storage systems

        Part K:      Protection from falling, collision and impact

        Part L1A:   Conservation of fuel and power  - new dwellings

        Part L1B:   Conservation of fuel and power  - existing dwellings

        Part M:      Access to and use of buildings

        Part N:      Glazing - safety in relation to impact, opening and

                         cleaning

        Part P:      Electrical safety

        Approved Document 7 (Workmanship and Materials)


 

Other useful Building Regs Publications

Materials and workmanship (Regulation 7)

 

Manual to the Building Regulations: 2001 Edition

 

The Building Act 1984

 

Garden walls

 

Preparing for floods

 

 

BUILDING REGS

Specifications & Drawings


 

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