How we fix it
We check hinge condition, sash squareness and frame plumb, then adjust the flags (up to 6mm of travel) or swap them for a heavier-duty set if they're worn. Takes 60–90 minutes. Adjust the hinges to bring the sash back into square, then re-align the keeps. If the hinges themselves are worn, we swap in heavier-duty replacements rated for 100kg door leafs.
- 60–90 minute visit for a straightforward adjustment
- Genuine replacement hinges — not universal 'will-fit' parts
- Same-visit keep re-alignment so the door closes without lifting
- Likely causes on Leicester homes: Thermal expansion pushing the sash out of square; Worn or crushed flag hinges after 10+ years of use.
