Service group
New & wider openings
Widening doorways, opening rear walls for bi-fold and sliding doors, infilling garage door openings and replacing failed lintels.
- Free survey visit
- Engineer's calculations arranged
- Building control handled
- Fixed written price once scope is agreed
- England, Wales, mainland Scotland & NI
Opening and lintel services
New and wider openings range from a hallway doorway to a five-metre rear wall for glazed doors. External openings need extra care with weatherproofing, cavity trays and beam stiffness so the doors run properly.
Wider doorways & openings
Widen an internal doorway or form a new opening, with a lintel or steel beam specified by an engineer.
From £1,000Learn more
Bi-fold & sliding door openings
Form a wide opening in an outside wall for bi-fold or sliding doors, on steel designed to suit glazing.
From £2,500Learn more
Garage conversion openings
Infill a garage door, open the garage into the house and handle the steel and approvals for a conversion.
From £1,000Learn more
Lintel replacement
Replace a cracked, sagging or rotten lintel over a window or door, with the brickwork propped and rebuilt to match.
From £400Learn moreNew & wider openings: common questions
Why does a bi-fold opening need a stiffer beam?
Large glazed doors are sensitive to movement. If the beam above flexes too much the doors can bind or the glass can be stressed, so the engineer limits deflection, which often means a deeper or heavier beam than strength alone would need.
Do I need approval to widen a doorway?
If the wall is load-bearing, yes. Widening an opening in a structural wall is building work needing approval. A non-structural stud partition usually does not.
Can a lintel be replaced without removing the window?
Often, yes, with the brickwork above propped while the old lintel is cut out. Sometimes the frame has to come out to get proper bearings; the survey tells you which.