Havering’s mix of post-war semis, newer builds, and older period homes means door openings vary in size, condition, and frame material. Before any door is ordered, the installer checks the frame for square, level, and structural soundness. A frame that is out of true will cause a new door to bind or gap regardless of how carefully it is hung.
Internal doors are trimmed to the opening, hinges are recessed cleanly, and the latch is aligned so the door closes without force. External doors, composite, uPVC, or solid wood, require draught sealing around the full perimeter and must meet Part L thermal performance requirements under Building Regulations. FENSA certification applies to replacement external doors that include glazing.
The installer fits all hardware, checks the lock alignment, and adjusts the door stop before signing off. The written quote covers the door slab, frame repairs if needed, hinges, handle and latch set, and any draught sealing, listed separately so you can see exactly what each element costs before work begins.