Service area · Hertfordshire
Glazed garden-room extensions, modern conservatories and slim aluminium bi-folds fitted across Hertford, Ware and the wider SG13–SG14 area. Premium specification on the period and detached housing typical of the area.
Survey within 4–6 working days · 10-year workmanship guarantee · Certass-notified installs
Working in Hertford
Hertford runs heavily to Georgian and Victorian townhouses through the centre, with larger detached housing through Bengeo, Hertingfordbury and Bayford. Conservatories and properly glazed garden-room extensions outnumber simple window replacements in our SG13/SG14 workload by a comfortable margin.
Ware adds a strong run of 1930s and post-war semi-detached, where bi-fold installations on rear extensions are the typical brief. The same fitting team covers both ends of the borough.
East Herts District Council handles building control across the area, and most modern conservatories under permitted development don't need full planning. We'll flag anything that does at survey. Quote slots typically diaried inside six working days for SG postcodes.
Postcodes: SG13 and SG14 · Neighbourhoods: Ware, Hertford Heath, Bayford, Bengeo, Hertingfordbury · Local landmarks: Hertford Castle, the River Lea, the Hertford East and North stations.

What we install
Every product on this list is installed weekly across the Hertfordshire catchment, with the same fitting team and the same warranty pack.
Surveyed and fitted across SG13 and SG14
Surveyed and fitted across SG13 and SG14
Surveyed and fitted across SG13 and SG14
Surveyed and fitted across SG13 and SG14
Surveyed and fitted across SG13 and SG14
Surveyed and fitted across SG13 and SG14
Surveyed and fitted across SG13 and SG14
Surveyed and fitted across SG13 and SG14
Why us
Lean-tos, gable-fronts and full garden rooms — premium aluminium specification matched to Hertford's period housing.
We know what falls inside PDR and what needs full planning across East Herts. Survey covers the consent route upfront.
Hertford is at the outer edge of our run, so quote turnaround is slightly longer than core Essex — but install standards and warranty are identical.
Same crew on every Hertford project. Both fitters experienced, both in-house, not agency.
leading aluminium and roof lantern systems carry the bulk of Hertford garden-room and bi-fold work. We won't propose budget systems on premium homes.
Every Hertford install — written into your quote. Aftercare adjustments included for 12 months.
Who runs your job
Director, Bi Folds & Windows Direct of Essex Ltd
Billy is the director of Bi Folds & Windows Direct of Essex Ltd — a family-run business incorporated on 20 June 2020 (Companies House No. 12684765) that supplies and installs aluminium bi-fold doors, uPVC and aluminium windows, composite front doors and roof lanterns directly to homeowners across Essex, Kent and Hertfordshire.
What we see locally
Patterns that come up specifically because of Hertford's housing stock — typical property age, build style, and local exposure.
1990s-era conservatory frames lose enormous heat. Modern aluminium and properly insulated glass roofs make these spaces usable year-round.
Conservation rules in central Hertford typically rule out modern replacements. Careful refurbishment or timber-effect like-for-like is the usual route — we'll confirm what's permitted at survey.
Some Hertford rear-extension work has been done without proper calcs. We'll insist on a structural sign-off before doors are ordered for openings over 2.4m.
Common on older lean-tos against the original house wall. Re-detail or replacement is the right answer — patch repairs rarely hold.
Recent work

Customer-supplied install photography is added to this gallery as it becomes available. Names withheld unless explicitly approved.
Our process
01
Booked within your stated response window. We measure, photograph and discuss specification on site — no deposit, no pressure.
02
Frames, glass, fitting and disposal listed separately. The number on the page is the number you pay.
03
Aluminium systems typically 4–6 weeks. PVC and composite doors typically 2–3 weeks. We confirm install date when frames arrive at our yard.
04
Our in-house crew on site. Old frames removed, new units fitted, Certass notification submitted, area swept clean before we leave.
Coverage
Centred on Hertford (SG13 and SG14). We work the full borough plus surrounding villages.
FAQs
Nearby areas
See full coverage details for our Harlow-area installations.
View Harlow pageSee full coverage details for our Chelmsford-area installations.
View Chelmsford pageSee full coverage details for our Brentwood-area installations.
View Brentwood pageFree home survey, written itemised quote, no deposit on the visit. Survey slots run 7am–8pm, seven days, normally diaried within 4–6 working days.