Flat Window Removal

• Before removal of existing windows, it is of extreme importance that the following points are checked:-
  • Check the structure around the opening for any defects such as cracked mortar joints and report any defects in writing to the customer before proceeding.
  • Check the new windows have not been damaged in transit and that they have been manufactured in accordance with the customers original order.
  • Check that the measurements of the new windows are correct so that they will fit into the aperture once the existing windows have been removed.
• Move any items of furniture away from the window aperture in order to avoid damage whilst removing the existing window or installing the new window.
• Cover carpets and soft furnishings with dust sheets so as to minimise the possibility of damage and to facilitate the “cleaning-up operation” after the installation.
• Using a craft knife or similar, score around the perimeter of the existing frame on the inside, where the plaster or wall decoration meets the frame. In most cases this will minimise damage.
• Remove all opening sashes and glass from the main frame
• Saw through any mullions or transoms and break these out of the main frame.
• Saw through verticals of main frame as far as possible without causing damage to internal reveals or structure.
• Protecting plaster and renderings with a bearing block, use a levering bar between the structure and the main vertical frame, to carefully lever the verticals inwards, and then complete the saw cut. Remove the vertical members completely from the aperture.
• Using the same procedure, remove the horizontal members of the outer frame from the aperture.
• Clean the aperture and remove where possible any mastic from the structure.
• Remove all debris from the site.
• Removal of sub-cills

  Sub-cills - and sometimes heads, windowboards and mullions are often ‘horned’ into the fabric of the aperture. This may conceal damp proof courses and lead to difficulties in removal. Great care must be taken when cutting and levering these items to reduce damage to plaster, renders and brickwork to a minimum. If the DPC is damaged, then it must be replaced.

• Removal of ‘Box-Sash’ windows

  Most box-sash windows pre-date cavity walls, and are built into the internal reveals of solid brickwork. The sashes are removed fully glazed.

  • Remove the mitred beading from around the frame.
  • Cut the sash cords to release the weights.
  • Remove the bottom sash, then take off the parting bead and take out top sash.
  • Cut the outer frame from the aperture, leaving the horns in the structure.
  • Remove the counterweights from the sash box.
  • Remove the sub-cill, if this is not part of the outer frame.

Please note: The information on this page is for guidance only, and Glass Tec Windows are not liable for any damages or claims.