Here at Chelsea Secondary Glazing, we are experts in dealing with old English heritage, we can advise on local planning authorities and government departments on any development proposals for many different types of listed buildings. Lucky most heritage bodies and conservations specialist realise the need to adapt a building to an ever-changing environment. The main issue that need to be addressed with old buildings are their thermal inefficiencies, draughts and poor acoustic performance, all of which can be easily fixed with secondary glazing.

In most cases, secondary glazing is fully accepted by and planning authority as it is a reversible revision. If it is required, it can be removed with ease at a latter date with little to no impact on the original canvas. Chelsea Secondary Glazing design and carefully install the necessary windows to leave the original main frame unaltered, leaving it with the original beauty with the added bonuses of modern technology.

Any alteration that affects the buildings character requires consent from local governing bodies to avoid any criminal affect. If the building is in a conservation area or is governed by an authority, the correct advise should be sought after before carrying any work.

The Planning (Listed Buildings and Conservations Areas) Act 1990 sets out the rules and regulations governing the treatment and enabling works of these types of buildings:

Grade I: buildings are of exceptional interest
Grade II*: important buildings of more than special interest
Grade II: buildings of special interest, warranting every effort to preserve them

We provide a wealth of experience when dealing with heritage sites ensuring that we meet the conservation guidelines. Chelsea Secondary Glazing has the widest selection of frames and windows to allow us to cater for any type of building; with our bespoke joinery and frames, we can match any style to fit in with its original décor that has easy maintenance and requires little to no attention.


  Minimises draughts
  Increases the rating on an EPC (Energy Performance Certificate)
  Improves comfort
  Reduces energy bills
  Reduces air infiltration
  Meets heritage guidelines
  Reduce heat loss


  Creates a quieter environment
  Reduces sleep disturbance
  Meets noise planning constraints
  Aids increased concentration and productivity
  Protects hearing
  Keeps annoyance and stress levels low


  Blast mitigation
  Deters intruders
  Protection against firearms
  Preserves clean environments
  Second barrier to entry
  Removes the need for unsightly grilles
  Maintains a normalised environment
  Provides a delay mechanism