Trade uPVC sliding sash windows in Derbyshire

Ordering uPVC sliding sash windows for jobs in Derbyshire

For listed buildings and conservation areas, the council decides whether uPVC sash windows are acceptable. Check before you order; once made to size, the windows cannot be returned.

Most vertical sliders are ordered as straight replacements for timber box sashes. If the originals have horns, glazing bars or a particular meeting-rail height, note it on your schedule and the new windows are made to match.

Specification at a glance

• Double glazed sealed units, with heritage spacer colours
• White, cream and woodgrain finishes
• Twin sashes sliding vertically in a uPVC box frame
• Run-through horns or plain sashes
• Georgian and astragal bar patterns

Delivery across Derbyshire

For Derbyshire, delivery is to your site, yard or unit. Tell us about any access limits, such as weight restrictions or narrow streets, so the right vehicle is booked.

Building regulations in England

Replacement windows in England should meet Approved Document L: a U-value of 1.4 W/m²K or a Window Energy Rating of band B. Approved Document F expects background ventilation to be no worse than before, which usually means trickle vents. Glazing in critical locations must break safely, be robust or in small panes, or be permanently protected under Approved Document K, which in practice usually means toughened or laminated safety glass. Rooms that need an escape route may need an escape window under Approved Document B. Replacing windows is notifiable building work: the installer self-certifies through a competent person scheme such as FENSA or Certass, or the work goes through building control.

Before anything goes into production you get a written order acknowledgement with sizes, finishes and handing for every item. Check it carefully, because made-to-measure items cannot be returned if the sizes were wrong.