The Survey: What We Measure and Why
Nothing is manufactured from a customer's measurements. Every opening is templated on site, because the difference between a window that closes properly and one that binds is a couple of millimetres across a diagonal.
The eight things recorded at every opening
Width and height at three points each, both diagonals to establish square, reveal depth at all four sides, sill slope and projection, the position of any radiator, pipework or window seat, the architrave line and whether it can be worked to, the primary window's opening action and travel, and the wall construction behind the plaster so we know what we are fixing into.
- Three-point width and height plus diagonals
- Reveal depth on all four sides
- Sill slope and projection
- Obstructions: radiators, pipes, seats, shutters
Why per-square-metre pricing misleads
Two windows of identical area can differ by half again in cost: one square, plumb and clear, the other out of square with a sloping sill, a radiator under it and an original shutter box to work around. Pricing per opening after a physical survey is the only way to give a figure that will not change later.
Decisions made on the day
Cavity depth per room, glass specification per room, frame finish against a physical sample chip, panel format for cleaning and escape, and trickle vent provision. You get the reasoning for each, not just a recommendation.
What you get afterwards
A written quotation itemised per opening with the specification stated in full, so you can compare it line by line against anyone else's. No lump sums.
Frequently asked questions
Around 30–45 minutes for a typical two or three-window job; a whole house takes an hour and a half or so.
Ready for a free, no-obligation quote?
South Yorkshire's specialists in secondary glazing — survey, measure, manufacture and install.