HIQ
HI Q WINDOWS
uPVC Windows & Doors
uPVC Windows & Doors
KÖMMERLING C70 uPVC WINDOWS · BIRMINGHAM & WEST MIDLANDS
Warmer. Quieter. Safer.
C70 performance built in.
C70 performance built in.
We manufacture our uPVC windows using the acclaimed Kömmerling C70 system – a 70mm,
5-chamber profile designed for modern homes. Enjoy A-rated energy performance, excellent
sound insulation and high security, all made to measure for your property.
Class-leading energy ratings
C70 windows achieve U-values from 1.2 W/m²K with double glazing, and as low as 0.88 W/m²K with triple glazing.
Impressive sound reduction
Acoustic performance up to 42 dB – helping cut external noise in most homes by over 50%.
High security design
Multi-point locking, strong welded corners and steel reinforcement where required.
Colour & style choice
From classic white to Anthracite Grey and timber-look foils, plus dual-colour options.
Why we use the Kömmerling C70 system
An acclaimed window system – tailored by HI Q WINDOWS for your home.
The C70 window and door system is one of Kömmerling’s most popular designs, thanks to its
clean chamfered lines, excellent thermal performance and wide choice of colours and finishes.
We build each frame to size in our own factory and install with care, so you get the full benefit
of the system in day-to-day use.
70mm, 5-chambered profiles
Modern chamfered look
U-values from 1.2 W/m²K
Up to 42 dB sound insulation
PAS 24-style security options
Huge colour & foil range
Energy
Keep the warmth in. Spend less to stay comfortable.
The Kömmerling C70 system uses a multi-chambered 70 mm frame and high quality
seals to reduce heat loss through your windows. Combined with our A-rated double glazing,
it helps your home feel warmer for longer while using less energy.
- 5-chambered frame design for outstanding insulation.
- U-values from 1.2 W/m²K with double glazing – even lower with triple glazing.
- Helps cut draughts, cold spots and condensation around frames.
- Complies with the latest Building Regulations for new and replacement windows.
Sound
Turn down the street. Turn up the quiet.
Your home should feel like a sanctuary. The same engineering that keeps heat in also
helps keep noise out. C70 windows can provide sound insulation of up to 42 dB, cutting
traffic, aircraft and neighbour noise so everyday life feels calmer.
- Up to 42 dB acoustic performance for impressive noise reduction.
- Ideal for homes near busy roads, schools, railways or flight paths.
- Optional glass upgrades for even better sound control in key rooms.
- Sleep, work and relax without the constant background buzz.
Security
From peace and quiet… to peace of mind.
C70 windows are designed to help resist forced entry. Strong welded corners and steel
reinforcement where required combine with modern multipoint locking and quality glazing
to create a tough barrier between your home and the outside world.
- Multipoint locking with shoot bolts and key-locking handles.
- Internal beading to help prevent glass removal from the outside.
- PAS 24-style security specifications and hardware options.
- Upgrade glazing to toughened or laminated glass in key locations.
Get an instant idea of cost.
Send us rough sizes for supply-only pricing, or book a free home visit if you’d like us
to measure, manufacture and install. We’ll advise on energy ratings, glass options and
the best C70 configuration for each room.
Colours & finish
From classic white to on-trend greys and timber-look foils.
Gone are the days when you could have any colour of PVCu window as long as it was white.
The Kömmerling C70 range offers a huge palette of standard and special colours, plus
authentic-looking woodgrain foils and dual-colour options to suit any style of home.
- Popular colours including Anthracite Grey, Slate Grey, Cream, Agate Grey and Chartwell Green.
- Timber-look foils such as Golden Oak, Irish Oak and Rosewood for a traditional feel.
- Dual-colour options – for example, white inside with a coloured exterior to match your brickwork.
- Low-maintenance uPVC that never needs painting – just an occasional wipe down.
Better for your home & the planet
A window to a better world.
Kömmerling were among the first to move away from lead-based stabilisers, using modern
calcium-zinc technology instead. The C70 system is designed with recycling in mind, and
is manufactured under strict environmental standards – including “Zero Pellet Loss”
certification to help keep plastic out of our oceans.
Lead-free calcium-zinc stabilisers
Designed for recyclability
Zero Pellet Loss certified
Low maintenance, long service life
How we work
Measured. Manufactured. Installed. Looked after.
We don’t just order windows in a box. We survey every opening, build your C70 windows
to size, install them cleanly, and provide full aftercare. No call centres – just a
direct line to the team who made and fitted them.
Local installers
Factory-made windows
Full aftercare
No repainting, ever
10+ year guarantees
Opening styles
Different rooms need different openings for safety, airflow and easy cleaning. The C70
system lets us build casement, tilt & turn and fire-escape windows that all share the
same modern look and performance.
Casement
Side- or top-hinged panes that open outwards. Great airflow, classic look, perfect for most homes.
Top vent
Small top openers for kitchens and bathrooms. Let steam out, keep privacy in.
Tilt & Turn
Tilt the sash inwards from the bottom hinges for secure ventilation, or turn fully inwards to clean both sides from inside your home.
Fire escape / egress
Wide-opening sashes designed to meet safety and Building Regulation requirements in habitable rooms.
Need child restrictors, toughened or laminated glass, trickle vents or specific compliance?
We’ll advise during your survey so every window is signed off properly.
Certified. Tested. Approved.
Your installation is carried out by qualified installers and meets current UK standards
for security, energy efficiency and safety. Our Kömmerling C70 windows are backed by
manufacturer testing and our own installation guarantees.
Certified installation • A-rated glazing • High security locking • Long guarantees •
Fully documented install.
Ready for your quote?
Send us rough sizes for a supply-only price, or book a free at-home survey for full installation.
Call: 0800-1-123-123
WhatsApp: 07481 798482
Email: sales@hiqwindows.co.uk
Factory & Showroom: 66 Montgomery St, Birmingham, B11 1DU