Jak and Callum are a two-man, family-run team from Wallington with over twenty years in the window trade between them. uPVC, aluminium and timber. Fitted clean, fitted right, no making good needed.
From a single misted pane to a whole-house replacement with a roof lantern on top. Four things we do, done properly.
uPVC, aluminium and timber. Casement, flush, sash and bay. Heritage styles for period homes.
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Composite and uPVC front doors, aluminium bifolds, patio sliders, french doors and porches.
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Conservatories, orangeries, roof lanterns and glazed gables. Old lean-tos replaced.
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Misted units, broken glass, fanlights, cat flaps, Velux swaps. Usually fixed within days.
See repairsSix styles cover almost every home in South London. Each comes in uPVC, aluminium or timber, in any of the finishes below.
The everyday window for most British homes. Hinged on one side or the top, it opens wide for airflow and cleans easily from inside. We fit uPVC, aluminium and timber casements in any colour.
The sash sits level with the frame instead of standing proud, so the window reads like painted timber from the street. Our most-requested style on 1930s semis and anything with a bit of character.
Two sashes slide vertically, exactly as they did in 1890. We replace timber bays like-for-like and fit uPVC sash with run-through horns and deep bottom rails where the budget needs it.
A full bay replacement including the structural posts, so the roof above is properly supported. Casement, flush or sash sashes in the bay, to match the rest of the house.
The door that turns a kitchen into a garden room. Slim aluminium frames, panels that stack to one side, and a low threshold you walk straight over.
When you want the most glass and the least frame. Two or three panes on stainless rollers, one disappearing behind the other.
Corners, sightlines, seals and hardware. The parts you only notice when they're wrong.
Every photo here was taken by Jak or Callum on the job. Swipe through.
Bespoke windows and doors can completely change the feel of a room: more natural light, a proper connection to the garden, and a finish that doesn't date. This Balham install combined all three, and made the space feel bigger without moving a wall.
An old home-built porch came off. New opening windows, a door and a tiled roof went on, sealed with lead where it mattered rather than tape. Drag the handle to compare.
“The UPVC frames and trims are excellent quality and everything is sealed to perfection, using lead where appropriate (not some cheap adhesive tape!). I've already asked them to quote for another project.”Verified Checkatrade review · RH5 · 10/10
BeforeAfter
Frames go in square and sealed, so there's nothing for a plasterer to fix afterwards. Just paint, as normal.
“Had all my windows replaced including 2 bay windows… didn't even need to do any making good internally.”Verified · CR5
Floors covered, belongings protected, rubbish and old frames taken away. You'd struggle to tell anyone had been.
“They cover your belongings, protect your floors, clean the areas afterwards fully, remove rubbish, and give you your mugs back!”Verified · N11
A clear written quote, no deposit pressure, and prices that have repeatedly come in under the competition.
“Very happy with the work… the price was the best out there with my new front door fitted within an hour.”I A · BR1
Every one of these is a verified Checkatrade review from a real job. We haven't cherry-picked: the lowest score we've ever had is 9.67.
Outstanding installation from JBC Windows Ltd. Second time we've used Jack for brand new UPVC sash windows for our Victorian house. On time, extremely fast, super friendly and reliable. He is the best tradesperson we've hired throughout our renovation - they…
I was really impressed with the service I received, Callum and Jak took the time in providing me options for my home improvements, they were professional, careful and cleaned up leaving no mess. I was nervous with removing existing patio doors replacing with…
JBC windows were an excellent choice, replacing 4 window sets (one of which a full bay timber sash like for like bespoke replacement) and 1 new door in 3.5 days of work to a very high standard. No making good required only painting as normal. Fantastic…
Short clips Jak and Callum film on the job. Follow @jbcwindowsltd for the rest.
Based in SM6, most of our work is across Sutton, Croydon, Coulsdon and Purley, and we're regularly in Clapham, Balham, Epsom and out into Surrey and Kent.
Tell us what you're thinking of changing. Jak or Callum will come out, measure up and give you a clear price with no pressure and no hard sell.
