Kömmerling Windows - Installed by Bowalker

Kömmerling windows give homeowners a German-designed uPVC window system with a choice of clean C70 chamfered styling, softer O70 ovolo styling and strong thermal performance from the 70mm platform. Bowalker installs and replaces Kömmerling windows throughout Sussex and Surrey using its own installers.

There are no salespeople, no subcontractors and no pressure, just honest advice, a detailed quote and a finished job backed by Bowalker’s 10-year insurance-backed installation guarantee, with Kömmerling product warranty details confirmed before work begins.

Call Bowalker on 01444 810 111 to book a free home consultation and see what Kömmerling windows would do for your home.

What Are Kömmerling Windows?

Kömmerling is a window profile brand within the profine Group. The brand was founded by Karl Kömmerling in 1897 and is used across PVC-U window systems supplied in many markets.

The Kömmerling range Bowalker specifies covers three window systems: Kömmerling 70, Kömmerling 76 and Kömmerling 88. C70 and O70 are official product names, not invented abbreviations. C70 refers to the chamfered-edge version of Kömmerling 70, while O70 refers to the ovolo, more decorative version.

Bowalker installs and replaces Kömmerling windows across Sussex and Surrey, using C70 where a cleaner modern look is wanted, O70 where a softer traditional profile suits the property, and Kömmerling 76 or Kömmerling 88 where the project calls for a higher-performance platform.

C70 and O70 clarity

The 70mm platform gives two distinct looks: C70 for chamfered modern lines and O70 for ovolo traditional detailing.

Measured U-values

Kömmerling 70 achieves a U-value of 1.2 W/(m²K) as standard, with 0.88 W/(m²K) possible on suitable triple-glazed specifications.

Profile and seal engineering

Five chambers, engineered frame design and seal integrity support thermal performance and weather protection.

Colour choice

Kömmerling lists 11 standard finishes from a wider range of more than 65 colours and finishes.

No subcontractors, ever

Bowalker’s own advisers, surveyors and installers quote, survey and fit the work, keeping responsibility with one team.

Why Bowalker Installs Kömmerling Windows?

Bowalker chooses Kömmerling for homeowners who want a proven uPVC profile platform with clear visual choices and measurable thermal performance. Kömmerling earns its place for a few clear reasons:

Bowalker customers continue to rate the company highly, including 9.67/10 on Checkatrade, and the same in-house approach is used on Kömmerling installations.

Kömmerling Window Styles Available from Bowalker

Kömmerling window style choice starts with the system platform and the face of the profile. C70 and O70 share the Kömmerling 70 platform but give different visual results at the frame, sash and glazing bead, while the 76mm and 88mm systems give deeper platforms for higher performance.

C70 chamfered

C70 has a subtle chamfer at the edge of the profile, creating cleaner lines for modern replacements and simpler elevations.

O70 ovolo

O70 uses attractive ovolo detailing on the profile edge and glazing beads for a softer, more decorative appearance.

Kömmerling 76

The deeper 76mm system, available in double seal and centre seal versions, may be specified where the project needs a higher-performance platform.

Kömmerling 88

The deepest 88mm centre seal system in the range, specified where thermal and weather performance matter most.

Colour and Finish Options Available

Kömmerling colour options give the profile platforms more flexibility than plain white replacement windows. The official Kömmerling 70 range lists 11 standard finishes from a wider range of more than 65 colours and finishes. The finishes Bowalker supplies include:

Standard foil finishes

White Ash, Golden Oak, Irish Oak, Rosewood, Anthracite Grey, Chartwell Green and other listed finishes cover common replacement needs.

Modern grey tones

Anthracite Grey, Slate Grey and similar finishes work well on extensions, rendered homes and properties moving away from white uPVC.

Traditional woodgrains

Oak and rosewood-type foils help older homes keep a warmer appearance without moving to timber.

Dual-colour options

External and internal finishes may differ where the chosen specification and supplier route allow.

Hardware pairing

Modern chrome or brushed steel hardware suits C70, while more traditional furniture may suit O70.

Kömmerling colour prices and lead times depend on the finish, system and order route. Bowalker confirms the finish plan before the windows are ordered.

Performance and Features of Kömmerling Windows

Kömmerling performance starts with the 70mm profile platform. Five-chamber technology, engineered frame design and seal integrity help Kömmerling 70 achieve a U-value of 1.2 W/(m²K) as standard.

Bowalker specifies these Kömmerling features around the property:

Thermal profile design: The five-chamber 70mm profile helps reduce heat transfer compared with older, failing or poorly insulated windows.
Triple-glazed potential: Kömmerling 70 may achieve 0.88 W/(m²K) on suitable triple-glazed specifications.
C70 or O70 appearance: C70 gives a clean chamfered face, while O70 gives ovolo detailing for a softer traditional look.
Sound insulation: Kömmerling 70 provides sound insulation of up to 42dB, which can reduce exterior noise intrusion within most homes by over 50%.

Greenline profile technology: Kömmerling is linked with Greenline lead-free PVC-U profile technology across its window and door systems.
Weather protection: Engineered seals and the profile platform help protect against draughts and rain.
Security-focused specification: Reinforcement, internal glazing and multi-point locking options support modern home security needs.
Glass and privacy options: Obscure, decorative and acoustic glass may be specified for bathrooms, side windows, front rooms and noise-sensitive spaces.

Replacing Your Windows with Kömmerling

Kömmerling window replacement is a practical route when older windows no longer perform but the home does not need real timber. C70 gives a clean modern replacement, O70 gives more traditional detailing, and the deeper 76mm and 88mm systems give higher performance where it matters.

Bowalker replaces tired timber, uPVC or aluminium windows with Kömmerling across Sussex and Surrey. We match the profile to the home, whether the project needs C70, O70, Kömmerling 76 or Kömmerling 88, then remove the old windows once installation is complete.

The signs that Kömmerling replacement windows may be worth considering include:

Draughts around failing seals, loose frames or older uPVC windows.

Misted glass from condensation trapped inside old sealed glazing units.

Discoloured frames where tired uPVC no longer suits the property.

Locking problems from stiff handles, failed mechanisms or locks that no longer catch correctly.

Poor weather seals causing water ingress, loose gaskets or whistling around the frame.

Rising heating costs from older windows that no longer perform properly.

Warranty: Two Layers of Protection

Kömmerling window frames, glass units, and hardware carry specialized manufacturer warranties, which Bowalker maps out separately from the 10-year installation guarantee for total clarity.

The written quote and order paperwork set out the Kömmerling product warranty details and Bowalker installation guarantee before installation starts.

Kömmerling product warranty

Kömmerling states that its PVC-U profiles carry a 10-year warranty, with further warranty information for glass and hardware provided through manufacturing and installation partners. Bowalker confirms the exact warranty details for your order before work begins.

Bowalker's 10-year installation guarantee

Bowalker guarantees its own workmanship for 10 years, and that guarantee is insurance-backed.

Real Installations: Before and After

Kömmerling project photos should show how the profile choice changes the home. A C70 replacement looks different from an O70 installation, and a deeper-platform project should be judged on the frame line as much as the colour.

Case studies may explain why C70, O70, Kömmerling 76 or Kömmerling 88 was selected, then show the finished result after Bowalker’s in-house installation.

How Installation Works

Bowalker’s installation process stays simple and in-house from the first visit to the finished job.

Book Your Free Consultation: One of our advisers visits to discuss the property, look at the existing openings, measure up and answer questions with no pressure.
Receive your no-obligation quote: Bowalker emails a detailed, itemised quote after the visit. Your deposit is fully refundable if the price changes once the job has been surveyed.
Let our in-house team install: Bowalker's own surveyors and installers carry out the work once your windows are ready, protect the work area and remove the old windows when the job is complete.

Get In Touch

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Ready to Install Kömmerling Windows with Bowalker?

Bowalker installs and replaces Kömmerling windows throughout Sussex and Surrey. Every installation is handled by Bowalker’s own team and backed by Bowalker’s 10-year insurance-backed installation guarantee.

Call 01444 810 111 to arrange your free, no-obligation home consultation. Bowalker will talk through C70, O70, Kömmerling 76, Kömmerling 88, glazing, colour and hardware options, then provide a detailed quote.

Enhance the comfort, style, and energy efficiency of your home with our premium windows and doors, contact us today.

01444 810 111