Bi-Fold Doors · Essex
Bi-Fold Doors
in Harlow
Modern A-rated double glazing, flat rooflights and aluminium bi-folds fitted across Harlow new town and the surrounding villages. Specialists in modernist post-war housing stock and the Old Harlow conservation area.
CM17, CM18, CM19 and CM20 · Surveys in 3–5 working days · 10-year workmanship guarantee
Local Detail
Bi-fold doors fitted across Harlow
Harlow is the most architecturally distinctive area we work in. Frederick Gibberd's master plan delivered a town where modernist 1950s–1960s housing dominates, and original Crittall-style steel-framed windows are still in service on a meaningful proportion of properties — much of it now in serious need of replacement.
Modern aluminium replacement frames replicate the slim sightlines of the original Crittall installs without the cold-bridging or corrosion. We've done this kind of replacement repeatedly across CM18, CM19 and CM20.
Old Harlow and parts of Sawbridgeworth are conservation areas where character must be preserved — careful timber-effect replacements are usually the route. Harlow Council is the local authority. Quote slots inside five working days.
Housing stock we work with here: Frederick Gibberd-era 1950s–1960s modernist housing, original Crittall-glazed properties, plus Old Harlow conservation-area period homes and modern Church Langley new-build estates.
Our vans are around Harlow Town Park, the M11 corridor, Stansted Airport approach most weeks, so survey and aftercare visits in Harlow are easy to diarise.
Why Us
Why Harlow homeowners choose us for bi-folds
Crittall replacement specialists
Slim-frame aluminium replicates the original Crittall sightlines without the cold-bridging. We've done this regularly across Harlow's modernist stock.
Conservation-aware approach
Old Harlow conservation properties get timber-effect aluminium or like-for-like replacement. We won't suggest changes that would force a planning refusal.
Survey within 3–5 working days
CM17–CM20 quote slots open 7am–8pm seven days. Most Harlow visits booked the same week as enquiry.
Flat rooflight specialists
1960s flat-roof extensions are a Harlow specialty. We install frameless, hinged and walk-on rooflights with full lead flashing detail.
Certass-notified, council-clean
Notification with Harlow Council handled in-house. Compliance certificate posted within 30 days.
10-year workmanship guarantee
Every Harlow install. Aftercare adjustments first 12 months.
What goes wrong
Bi-fold problems we get called out to in Harlow
End-of-life Crittall steel windows
Original Harlow Crittall is corroded, cold and frequently single-glazed. Slim-frame aluminium is the modern equivalent that respects the original look.
Flat-roof rooflights leaking at flashing
Common on 1960s extensions where the flashing was never properly dressed. Re-detail at the time of replacement is essential.
Cold-bridging on original 1960s frames
Single-glazed steel frames lose huge heat. Replacement A-rated argon units transform thermal performance and dramatically reduce condensation.
Listed/conservation restrictions in Old Harlow
Old Harlow conservation rules limit external changes. Careful timber-effect replacement is the usual route — we'll confirm what's permitted at survey.
Process
How a Harlow bi-fold install runs
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01
Free survey
We measure the opening, check the threshold and the lintel, and talk through pane counts and stacking direction on site.
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02
Configuration & spec
Pane split, stacking side, traffic door position, RAL frame colour, glass spec and threshold type — all confirmed in writing.
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03
Manufacture
Frames are made to your surveyed sizes. We confirm the install date once they leave the factory.
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04
Installation
Old doors out, track laser-levelled and DPM'd, frames set square, every panel tested through its full fold before we leave.
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05
Sign-off & guarantee
Operation walk-through, Certass notification within 30 days, and a 10-year workmanship guarantee in writing.
Recent Work
Recent bi-fold door jobs near Harlow
Flat rooflight in Harlow (CM20) — 2025
1.5m × 1.0m frameless flat rooflight on a flat-roof extension. Self-cleaning glass, U-value 1.0 W/m²K, fitted in a single day with full lead flashing detail.
FAQs
Bi-fold door questions from Harlow homeowners
Nearby & Related
Bi-fold doors in nearby areas
Related pages
- Bi-fold doors in Essex — full specification, systems and guarantee detail.
- All services in Harlow — windows, doors, lanterns and glazing locally.
- Sliding doors — the alternative where you want fewer, wider panes.
- Aluminium vs PVC bi-fold doors — how the two compare on sightlines and lifespan.
Get a free bi-fold door quote in Harlow
Free survey across CM17, CM18, CM19 and CM20, usually within 3–5 working days. Itemised written quote, no deposit at survey.