"Replacement Visofold bottom roller arrived next day, exact fit, identical to the original. Fitted in 15 minutes. Door slides like it did when it was new."
Mark PattersonInstaller · York
ACDV232001 / CatalogueDoor & window parts since 1985
Door hardware,
dialled in.
Replacement bifold rollers, sliding patio handles, multipoint locks, gaskets and trickle vents — stocked in Middlesbrough, dispatched next-day across the UK. Sourced for the trade, sold to anyone.
- In stock
- 2,400+
- Fitted parts
- 94k
- UK delivery
- 24h
FIG. 01
ACDV233
Featured part
Smart Visofold 1000 Top Guide
Smart Systems
£83.99inc VAT
300 in stock
Stocked brands
Compatible parts for major UK systems.
Smartsest. 1908
Avocet ABSest. 1981
Yaleest. 1840
Macoest. 1947
Greenwoodest. 1947
Saracenest. 1985
Cotswoldest. 1969
Milaest. 1973
Smartsest. 1908
Avocet ABSest. 1981
Yaleest. 1840
Macoest. 1947
Greenwoodest. 1947
Saracenest. 1985
Cotswoldest. 1969
Milaest. 1973
002 /Catalogue
Five sections, all in stock.
From a single bifold roller to a full multipoint replacement — the parts your customers actually ask for, organised the way you'd actually find them.
Bifold, sliding, and entry
Door hardware
Replacement parts engineered to restore smooth movement, correct alignment, and a secure closing action.
- Bifold rollers & hinges
- Sliding patio gear
- Handles
- Hinges
Cylinders, gearboxes, multipoints
Locks & security
3-star anti-snap cylinders, multipoint replacements, gearboxes and accessories.
Gaskets, vents, drainage
Seals & ventilation
10 parts
Fixings, drivers, spare parts
Tools & accessories
0 parts
Tilt-turn, restrictors, hinges
Window hardware
20 parts
003 /Bestsellers
The parts that keep walking out the door.
Eight months of order history, top of the chart. If your customer doesn't know the SKU, it's probably one of these.
004 /Identification
Don't know the SKU? You're not alone.
Most replacement-part searches start with "the silver thing that broke." Our three-step identifier walks you from "this door is a bifold" to the exact part number — typically in under 60 seconds.
Step 01
Snap the part
Photograph the failed part in its housing. Include a ruler or coin for scale.
Step 02
Measure twice
Width, depth, centre-to-centre on the mounting holes. The numbers matter more than the photo.
Step 03
Ask us
Email the photo + dimensions to our parts desk. Replies typically within 2 working hours.
005 /Why BM
Trade buyers don't get fobbed off.
40 years in fenestration, our own factory in Middlesbrough, and a parts desk that picks up the phone. We exist because the alternatives didn't.
1985
Founded in Teesside. Bought, fitted, replaced everything from school doors to luxury bifolds.
2,400+
SKUs stocked in our Middlesbrough warehouse. Not drop-shipped from a Chinese marketplace.
94k
Parts dispatched in the last three years. Same packers, every shift.
4.9★
Average Trustpilot review across 1,200+ verified buyers. Most-mentioned phrase: "actually answered the phone".
006 /Tradesfolk & homeowners
The reviews are unanimous.
"Called the parts desk because my door wouldn't lock. Spoke to a real person who diagnosed the worn gearbox over the phone. Part was on my desk the next morning."
Sarah WhitlockHomeowner · Newcastle
ACDV227"I've been ordering from BM for our maintenance contracts since 2019. Consistent quality, fair trade pricing, and they actually have stock when other suppliers are 6 weeks out."
David YuFacilities manager · Manchester
2QCY3S40007 /Help library
Forty years of fitting tips, on tap.
Measuring guides, "is this part fixable?" flowcharts, brand cross-references and the diagrams your supplier should have sent you. Free, no email gate.
How to measure for a replacement roller
Width, depth, mounting centres. Three measurements and you're done.
Read guideIdentify your part from a photo
Flowchart that takes you from "it's a metal thing" to an SKU.
Read guideBifold servicing checklist
Annual maintenance worth doing — most failures are preventable.
Read guideFrequently asked questions
Fitting, returns, trade discounts, delivery surcharges.
Read guide