Your window work explained

We always advise our customers to read this section prior to the commencement of works. It will help you to gain a good understanding of the kind of work you can expect and the sort of preparation you should make.

This section covers six important categories which are listed below:

  • Single Glazed Refurbishment
  • Installation of new sashes into existing casements
  • Full new sash and casement installation
  • Specialised Painting
  • Ironmongery used


Level 1 – Single Glazed Refurbishment Works

  • First level of maintenance work
  • Full refurbishment of casements
  • Windows should be functioning properly
  • Rotten timbers replaced
  • Pointing will normally be replaced externally
  • Casements and sashes will be sanded and refurbished to bring them up to a higher standard
  • Sashes and casements are originals so unlikely to be perfectly plumb and square meaning that they may have a lesser level of draught proofing
  • Approximately 70% draught proofing level
  • Moulding detail may not be as sharp as new sashes due to the many layers of paint applied to them over the years


Level 2 – Installation of New Sashes into Existing Casements

  • Second level of works
  • Manufacturing of new sashes to be installed into your existing casements
  • Very little of your original window will remain so you can expect a higher level of finish than level 1
  • New sashes should be freely moving and operate efficiently
  • If original casements are used there may still be sideways movement as they may be bowed or twisted
  • Approximately 80% draught proofed


Level 3 – Full New Sash and Casement Replacement

  • Third level of works
  • New casements will be perfectly square and windows should operate perfectly
  • Approximately 90-95% draught proofed
  • Will involve the removal of old shutters and panel work from your window areas. There will be a build-up of historic soot and grime behind these areas so you should expect a level of re-
  • decoration work. Paint seams will be cracked and a level of remedial prep work may be required.


Specialised Painting:

HSC always recommends that our customers use our painting service.

The painting of sash and case windows is very skilled process. If they are not correctly painted then the life span could be severely reduced. If you do prefer to use another company for painting we recommend that you use a suitably qualified contractor.

Painting preparation in the workshop:

  • Knot seal
  • Primer applied
  • First undercoat

Painting on site:

  • Second undercoat
  • Top coat applied

Be aware:

  • Paintwork takes seven days to dry. You should move and open your windows on a daily basis during this period to avoid them sticking.
  • A start date for painting will be given after all joinery works are completed.
  • Painting work is subject to weather conditions
  • You will be invoiced separately for painting work



HSC uses only the best quality ironmongery available for our windows. Many of these fittings are modelled on those used in the Victorian and Georgian era. They are usually made from solid brass or when extra strength is required we will use steel but with a solid brass finish if required.

Fittings are available in three finishes:

  • Polished Brass
  • Chrome
  • Satin chrome.

For information on payments and deposits please click here: Payments and deposits
To view our terms and conditions please click here: Terms and conditions