Open the back of your house onto the garden, then close it down to A-rated thermal performance. Concealed runners, soft-close magnets, 70mm sightlines and a 10-year guarantee on every install.
Smart Systems & Origin profile installer · PAS 24 security tested · 600+ installs across the Marches.
A well-fitted bifold transforms a kitchen-diner into something genuinely different. Closed, it's an A-rated thermal envelope. Open, the back wall disappears and the garden becomes another room.
Bifolds are not a commodity - the cheap end of the market fails predictably and visibly within a few years.
Sub-£3,000 systems often use stamped-steel rollers that pit and stick. Once they jam, the whole leaf has to come out for replacement.
Non-thermally-broken aluminium runs cold and condenses water on the inside of the frame in winter - a permanent dribble onto the threshold.
Bifolds need a level, structural threshold tolerant to 2mm. Get the brickwork wrong and the doors never close cleanly.
Large bifold panels are heavy - wrong-spec hinges and tracks fail within a year of daily use.
We measure the structural opening, check the threshold level, discuss panel count, opening direction, traffic-door positioning and threshold style.
You receive: profile, finish, glass spec, hardware, threshold, structural lintel allowance, fitting and waste removal - itemised in writing.
Aluminium bifolds: 5–7 weeks. UPVC bifolds: 4–5 weeks. Premium Origin and Smart Systems: 6–8 weeks.
Most 3–5 panel sets fit in a single day. Threshold bedded in, frame plumbed and packed, panels hung, rollers and magnets adjusted, silicone sealed inside and out.
Full cycle test of every panel, threshold drainage verified, glass cleaned, 10-year guarantee registered and walkthrough completed.
Open up 2–6 metres of back wall - turn a kitchen-diner into a covered terrace in seconds.
Maximum glass, minimum frame - the view stays the view.
Panels self-align and close softly, even on 6-metre spans.
Thermally-broken aluminium and triple-glazed sealed units keep U-values down to 1.3 W/m²K.
Multi-point shoot bolts, anti-lift tracks and laminated glass options as standard.
Specify a single leaf as a traffic door so you don't have to open the whole set every time.
Bifold specification is where good extensions are made or lost. Five variables matter: profile system, panel configuration, threshold, glass spec and structural opening tolerance.
Origin OB-49 and OB-72 for premium ultra-slim aluminium, Smart Visofold 1000 for the contemporary architectural look, Aluk F82 for high-thermal performance, and Liniar UPVC for budget-conscious installs. We don't fit unbranded Far East imports - the parts supply chain collapses within five years.
2-panel: opens 1.8m. 3-panel: opens 2.7m with a single traffic door. 4-panel: opens 3.6m with two-and-two split. 5 and 6-panel: open 4.5–5.4m, ideal for orangeries and large extensions. 7 and 8-panel: structural design required, typically commercial or large new-build.
Standard 70mm rebated weather-tight threshold for typical UK weather, low-level 25mm threshold for level-access compliance, fully flush threshold (subject to threshold drainage detail) for premium architectural finish - best paired with an overhang or porch.
Standard sealed units are 28mm low-E double-glazed achieving 1.4 W/m²K. Triple-glazed 44mm units achieve 1.0 W/m²K and are recommended for north and east-facing installs. Acoustic-laminated glass available for properties on busier roads.
Residential bifolds prioritise aesthetics and ease of operation. Commercial installs (cafe and restaurant fronts) prioritise traffic durability, automatic-close fittings and finger-trap-rated hardware. We fit both - the survey identifies which spec is appropriate.
If a question's missing, ring us - five minutes on the phone beats a brochure every time.
Free survey, no deposit on the day, no high-pressure sales script. We measure, advise honestly on the right specification and email a fixed price.
