--- title: "Bi-Fold Doors Harlow | Aluminium Bi-Folds Fitted in CM17" url: https://bifoldsdirectessex.co.uk/bi-fold-doors-harlow/ description: "Aluminium bi-fold doors supplied and fitted across Harlow, Essex (CM17, CM18, CM19 and CM20). Free survey in 3–5 working days, own fitting team, 10-year workmanship guarantee." lang: en-GB --- Image: Harlow — double glazing and rooflight installation coverage area, modernist new-town residential street (https://bifoldsdirectessex.co.uk/assets/18-B2ep7GoH.jpeg) 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. Get a Free Quote: https://bifoldsdirectessex.co.uk/contact/ 07903 632039: +447903632039 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 1. 01 ### Free survey We measure the opening, check the threshold and the lintel, and talk through pane counts and stacking direction on site. 2. 02 ### Configuration & spec Pane split, stacking side, traffic door position, RAL frame colour, glass spec and threshold type — all confirmed in writing. 3. 03 ### Manufacture Frames are made to your surveyed sizes. We confirm the install date once they leave the factory. 4. 04 ### Installation Old doors out, track laser-levelled and DPM'd, frames set square, every panel tested through its full fold before we leave. 5. 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 Image: New flat glass rooflight installed in the flat-roof extension of a 1960s modernist home in Harlow (https://bifoldsdirectessex.co.uk/assets/21-D-SqonRD.jpeg) 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 - Bi-fold doors in Hertford: https://bifoldsdirectessex.co.uk/bi-fold-doors-hertford/ - Bi-fold doors in Chelmsford: https://bifoldsdirectessex.co.uk/bi-fold-doors-chelmsford/ - Bi-fold doors in Brentwood: https://bifoldsdirectessex.co.uk/bi-fold-doors-brentwood/ ### Related pages - Bi-fold doors in Essex (https://bifoldsdirectessex.co.uk/bi-fold-doors-essex/) — full specification, systems and guarantee detail. - All services in Harlow (https://bifoldsdirectessex.co.uk/areas/harlow/) — windows, doors, lanterns and glazing locally. - Sliding doors (https://bifoldsdirectessex.co.uk/sliding-doors-essex/) — the alternative where you want fewer, wider panes. - Aluminium vs PVC bi-fold doors (https://bifoldsdirectessex.co.uk/aluminium-vs-pvc-bifold-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. 07903 632039: +447903632039 ## Structured data ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Service", "@id": "https://www.bifoldsdirectessex.co.uk/bi-fold-doors-harlow/#service", "serviceType": "Bi-Fold Door Installation", "name": "Bi-Fold Doors in Harlow", "description": "Aluminium bi-fold doors supplied and fitted across Harlow, Essex (CM17, CM18, CM19 and CM20). 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