Premium bespoke windows and doors - custom made, expertly installed, and guaranteed to last. Affordable for every home across London and Kent.
Quick Consultation
Our local experts call you back - usually within the hour.
We combine factory-direct quality with expert local installation so you get the best of both - premium products at honest prices.
Multi-point locking systems and toughened glass as standard on every product we install.
Argon-filled sealed units with Low-E thermal glass and warm-edge spacers that retain indoor warmth in winter, keep unwanted heat out in summer, and lower energy bills.
Acoustic glass options that significantly reduce outside noise for a quieter, calmer home.
Built to withstand the British climate - storm-tested, draughtproof, and fully weathersealed.
From heritage timber sash to ultra-slim anthracite aluminium - we match any architectural style.
Fully qualified, fully insured local installers who take pride in every single job.
Discover the multi-layered science behind our high-performance double and triple-glazed units.
Precision-engineered dual glass panes separated by an airtight sealed cavity that forms a resilient thermal and acoustic sound barrier.
Dense, harmless argon gas sealed within the gap acts as a superior insulator, significantly slowing down heat transfer compared to air.
A microscopic metallic coating that reflects radiant interior heat back into your home while letting abundant natural daylight flood in.
Composite thermal spacers and multi-chambered insulated frames minimize edge conduction, virtually eliminating perimeter heat loss.
Every product is custom made to your exact measurements and installed by our own certified team.
Casement, Sash, Tilt-Turn & Bay
Every Instaglow window is custom built to your exact aperture. Featuring precision two-pane sealed units filled with insulating argon gas, advanced Low-E glass that reflects heat back into the room, and insulated frames with warm-edge spacers to eliminate draughts, prevent condensation, cut exterior noise, and dramatically lower heating bills.
Contemporary Aluminium & Composite Designs
Make an unforgettable first impression. Our modern entrance doors feature bold geometric glazing details, long T-bar stainless handles, and flush finishes that suit any contemporary home. Supplied with sidelights and top panels to flood your hallway with light while maintaining complete privacy.
Classic & contemporary composite panel designs
Our composite doors combine a solid timber core with a tough GRP skin for a door that looks stunning and never warps, swells, or fades. Available in a wide range of styles - from classic arched panels to bold anthracite modern designs - all with multi-point high-security locks as standard.
Fully framed aluminium entrance porch systems
Add a fully glazed entrance porch to your home to create a secure, weatherproof lobby while dramatically improving kerb appeal. Our porch systems are custom built in anthracite or white aluminium, with frosted or clear double glazing, and can include integrated canopy roofing.
Architectural glazing that brings the sky inside
Roof lanterns and flat-roof skylights are the most dramatic way to transform an extension or kitchen. With slim aluminium profiles and large panes of solar-control or self-cleaning glass, they create exceptional light and bring a real wow factor to any space below.
A selection of recent window and door projects completed by our team across London and Kent.
Don't just take our word for it. Read honest feedback from homeowners across London and Kent.
"We absolutely love our new windows! The whole house feels significantly brighter and noticeably more energy-efficient since the installation. The team was fantastic, and we highly recommend InstaGlow to anyone looking for real quality."
"I highly recommend InstaGlow Windows and Doors who did an excellent job replacing PVC doors and windows at my place. They fitted 8 windows and 2 doors to a very high standard, completing exactly on time. Thrilled with the professionalism."
"We couldn't be happier with our new windows. The installation team was highly skilled, working efficiently while paying incredible attention to detail. Every window was perfectly fitted, and the crew kept everything exceptionally tidy."
"Instaglow did an absolutely amazing job with our new doors and windows. From start to finish, the process was seamless, and the pricing was incredibly budget-friendly. The attention to detail was fantastic. We highly recommend their team!"
"We had a truly great experience with this company from day one. They provided a very competitive quote for a new premium front door, and the final installation exceeded our expectations. The team was punctual and the craftsmanship is superb."
Tell us about your project and we'll arrange a free home survey and detailed quote - usually within 48 hours. No pushy sales tactics, just honest advice.
We'll be in touch within 24 hours
