Hertfordshire
Bifold proof slot for a Hertfordshire extension
Use this slot for a verified rear-opening project once real photos, specification, location permission and customer wording are available.
Green Property Windows & Doors
Aluminium Bifold Doors Supplied and Fitted Across London and the Three Counties
Open up your kitchen, extension or garden room with aluminium bifold doors measured, supplied and fitted by a local installation team. We check the opening, threshold, access and compliance route before ordering so the installation is planned properly.
Survey-led measuring and compliance guidance before ordering.
Survey-led quotes
Supply & fit or fit-only
Compliance route explained
Real project photos
Workmanship terms explained
Quick answer
What to know first
Best for kitchen extensions, garden openings and wide rear openings. Available as supply & fit or fit-only, subject to checks. Key choices include panel count, threshold, colour, opening direction and glazing.
Options
Designed around your home
2-panel bifolds
Checked against the opening, product specification and finish details before ordering.
3-panel bifolds
Checked against the opening, product specification and finish details before ordering.
4-panel bifolds
Checked against the opening, product specification and finish details before ordering.
Low-threshold options
Checked against the opening, product specification and finish details before ordering.
Colour and hardware
Checked against the opening, product specification and finish details before ordering.
Integral blinds if specified
Checked against the opening, product specification and finish details before ordering.
Decision support
Bifold doors or sliding doors?
We keep the choice practical: how the opening is used, how the product looks, what it needs to achieve and what route is needed for paperwork.
Not sure? Send photosMaximum clear openingBifold doors
Largest individual glass panelsSliding patio doors
Traffic door for daily useBifold configuration
Very slim sightlinesSliding or premium aluminium systems
Process
From first photos to final handover
1
Photos or plans
A practical step before ordering or fitting.
2
Initial guidance
A practical step before ordering or fitting.
3
Measured survey
A practical step before ordering or fitting.
4
Product specification
A practical step before ordering or fitting.
5
Installation and handover
A practical step before ordering or fitting.
Compliance
Compliance considered before the job starts
We explain the compliance route before you order, not after the job is finished.
Read our certification guideBuilding Regulations route
Checked where relevant and explained in plain English.
Part L energy performance
Checked where relevant and explained in plain English.
Part F ventilation
Checked where relevant and explained in plain English.
Safety glazing
Checked where relevant and explained in plain English.
Pricing factors
What affects the quote?
Width and panel count
Confirmed before a final measured quote.
Aluminium system
Confirmed before a final measured quote.
Colour and finish
Confirmed before a final measured quote.
Glazing specification
Confirmed before a final measured quote.
Threshold detail
Confirmed before a final measured quote.
Access and removal
Confirmed before a final measured quote.
Structural readiness
Confirmed before a final measured quote.
Making-good
Confirmed before a final measured quote.
Project proof
Recent project examples
Greater London
Replacement window proof slot for a brick home
Reserved for a verified window replacement showing ventilation decisions, finish details and the agreed certification route.
London and the Three Counties
Composite front door proof slot
Reserved for a verified entrance upgrade with frame size, threshold, glazing safety and hardware choices documented.
FAQs
Common questions
How long does installation take?
Many straightforward replacements can be fitted in one to two days, but access, size and making-good affect the programme.
Do bifolds need trickle vents?
Ventilation needs to be checked before ordering. Many replacement projects need background ventilation under Part F.
Can bifolds replace French doors?
Often, yes, subject to measuring, structure, threshold details and compliance route.
Can you fit bifolds I bought online?
Possibly. Fit-only installation is subject to product, opening, access and certification checks.
Next step
Send photos, postcode and project details.
We’ll tell you what we need to check, what options are realistic and what compliance route may apply before you order.