What Silverline Windows does

Silverline Windows Ltd is a privately held, founder-owned UK fenestration installer founded in 1981 by Andreas Michael and headquartered in North London (Silverline Place, 91 Trinity Rd, London N22). The company supplies and installs bespoke aluminium and UPVC windows and doors for residential homeowners and, to a lesser extent, commercial properties, operating within a single geographic market in North London with a 51-100 employee headcount.

The product portfolio is organised around two core categories (UPVC and aluminium windows and doors) sourced from leading UK and European manufacturers including REHAU, Origin, ALuK, Calibre, Solidor, Rockdoor, Korniche, and GAP. Adjacent offerings include secondary glazing, roof lanterns, conservatories, porches, stained glass, integral blinds, and oriel windows. Products carry FENSA registration for UK building-regulation compliance, with options carrying PAS 24 security accreditation, Secured by Design certification, and A-rated Window Energy Ratings. The value proposition is built on bespoke manufacturing to customer specifications, with up to 25 coloured foil options and over 200 painted colours available.

The business model is direct, consultative field sales: customers contact the company and an in-house expert visits the property for a no-obligation free quotation, with pricing entirely custom and not publicly disclosed. Installation is performed by Silverline's own FENSA-registered operatives, and revenue is generated on a one-time basis per project from product supply plus installation services. Marketing relies on the company website with downloadable product brochures, an Instagram channel for visual inspiration, and customer reviews/testimonials, with much of new business originating from recommendations and repeat customers accumulated over 41 years of local operation.

Name

Silverline Windows

Legal name

Silverline Windows Ltd

Website

https://silverlinewindows.co.uk

Company type

Private

Founded year

1981

Operating status

Operating

Headcount range

51–100 employees

Short description

Silverline Windows is a privately held North London installer, founded 1981, supplying and fitting bespoke aluminium and UPVC windows, doors, secondary glazing, and roof lanterns for residential and commercial customers using a direct field-sales and quote-based model.

Ownership category

akta.pro rank

Product category

Window and Door Installation Services

NAICS

Glass and Glazing Contractors (23815), Metal Window and Door Manufacturing (332321)

SIC

Metal Doors, Sash, Frames, Moldings & Trim (3442)

akta.pro primary industry

Windows (IMADAIAC)

akta.pro secondary industries

Exterior Doors (IMADAIAA), Skylights & Roof Windows (IMADAIAD), Architectural & Building Glazing Systems (Curtain Wall/Storefront/Canopies) (IMADAHAB)

Keywords

• Bespoke window installation
• UPVC door supply
• Aluminium window systems
• Secondary glazing solutions
• Residential window replacement

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Marketing or Sales, Others

Revenue model

1. Windows and Doors - Product Sales: Direct sale of UPVC and aluminium windows, doors, and related products to residential customers. Products include casement windows, sash windows, French doors, bi-folding doors, sliding doors, and composite doors.
2. Installation Services: Full supply and installation service including on-site measurement, professional installation, and after-sales support. Company provides FENSA-registered installation services.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Silverline Windows Ltd supplies and installs bespoke UPVC and aluminium windows, doors, secondary glazing, roof lanterns, and complementary products (conservatories, porches, stained glass, integral blinds) for residential and commercial properties in North London. Products are manufactured or assembled to customer specifications in finishes such as 25 coloured foil options and over 200 painted colours, and installations are carried out by a FENSA-registered team with dedicated after-sales support.

Product overview

Silverline Windows is a FENSA-registered company founded in 1981, specializing in the supply and installation of bespoke windows and doors for residential and commercial properties in North London. The product portfolio is organized into two core categories: UPVC products (windows and doors featuring Rehau, Calibre, and Residence Collection brands) and Aluminium products (windows and doors featuring Origin and ALuK brands). Beyond these core offerings, Silverline provides complementary products including Secondary Glazing, Roof Lanterns (Korniche, Flat Skylight), Conservatories, Porches, Stained Glass, and Integral Blinds. The company also offers repair and maintenance services for their installed products.

Differentiator

Problem solved

Functional benefit

Products and services

• UPVC Windows Bespoke UPVC windows offering security, insulation, and low maintenance, designed to withstand the elements. Includes Rehau Rio Flush, Rehau T70, Calibre, Heritage Sash Windows, and Residence Collection (R7, R9). Supplied and installed for residential customers.
• Aluminium Windows Bespoke aluminium windows with slim profiles, durability, rust resistance, and modern appearance. Includes Origin OW70, Origin OW80, ALuK Flush Casement, ALuK 58BW Hi Casement, ALuK Heritage Range, and Smart Opal Heritage System.
• Secondary Glazing Secondary glazing installed behind existing primary windows, providing more than double the sound protection compared to standard double glazing and around 65% improvement in thermal insulation. Cost-effective alternative to full window replacement.
• UPVC Doors Bespoke UPVC doors offering security, insulation, and low maintenance. Includes Rehau French Door, Calibre, Solidor, and Rockdoor product lines.
• Aluminium Doors Bespoke aluminium doors with clean modern design and rust resistance. Includes Bi-Fold, Sliding, French, Single, Unifold+, Edgeglide+, and Origin Residential Doors Collection.
• Roof Lanterns Roof lanterns designed to bring natural light into homes while adding an architectural feature. Includes Flat Skylight and Korniche systems with thermally broken construction and U values as low as 1.2.
• Oriel Windows Specialised oriel window solutions supplied and installed for residential properties.
• Conservatories Conservatories offering versatile ways to add extra living space with natural light.
• Porches Porches creating convenient entrance spaces while adding character, curb appeal, and security to residential properties.
• Stained Glass Stained glass products adding unique color and elegance with various patterns and colors available for residential installations.
• Integral Blinds Integral blinds fitted between panes of glass for controlling light and privacy, sealed inside and maintenance-free.
• Window and Door Supply and Installation Service Full supply and installation service including on-site measurement, professional FENSA-registered installation, and dedicated after-sales team support. Customers receive a free no-obligation on-site consultation and a personalised quotation.

Quantifiable outcome

• Secondary glazing reduces noise by up to 80%
• +2 more outcomes

Named customers3 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Four partnerships are on record, tiered core.

• REHAUcoreTechnology or IntegrationREHAU is the leading European manufacturer in thermoplastic extrusions and UK market leader in PVCu window and door systems, producing up to 44,000,000 metres of extruded profile per year. Silverline uses REHAU profiles for their PVCu windows and doors, benefiting from proven, stylish and attractive window systems with low maintenance and greater security.
• OrigincoreTechnology or IntegrationOrigin is the UK's leading manufacturer of bespoke aluminium bi-folding doors and windows. Origin products feature premium grade aluminium using prime billets (not re-melted scraps) and achieve the voluntary security accreditation of Secured by Design. Silverline offers Origin OW70 and OW80 windows, bi-folding doors, sliding doors, French doors, and single doors.
• ALuKcoreTechnology or IntegrationALuK designs unique aluminium window systems that exceed performance standards expected in modern building design. ALuK provides tailor-made quality solutions with optimum balance between design, aesthetics, performance, and commercial aspects. Silverline offers ALuK 58BW Hi Casement, ALuK Flush Casement, and ALuK Heritage Range windows.
• CalibrecoreTechnology or IntegrationCalibre offers multi-chambered profile systems providing outstanding thermal performance that can easily achieve the highest A Window Energy Rating (WER). Calibre products are cost-effective, high performing, and available with 55mm or 67mm outer frames.

Scale indicators2 records

Recent moves4 records

Expansion highlights4 records

Direct peers

• Zenith Staybrite: UK regional window, door and conservatory installer with a similar field-sales, quote-based model and comparable product range to Silverline.
• Safestyle UK: Listed UK installer of uPVC and aluminium windows and doors targeting residential replacement customers, the closest publicly comparable direct competitor to Silverline in product mix and customer base.
• Climateframe: UK bespoke window and door installer emphasizing energy efficiency and high-end residential projects, directly comparable on product positioning and bespoke manufacturing emphasis.
• Zenith Windows: Independent UK window and door installer offering bespoke residential replacement services comparable to Silverline's product set and install-led go-to-market.
• Crystal Windows: Established UK window, door and conservatory installer with a similar regional service model and product breadth to Silverline.

Regional players

• Britelite Windows: South East England-based uPVC and aluminium window and door installer with a similar consultative sales approach and residential customer focus.

Broad incumbents

• Everest: Major UK manufacturer-installer of windows, doors and glazing with national coverage; overlaps with Silverline on residential window/door replacement and brings stronger brand and marketing scale.
• Anglian Home Improvements: One of the largest UK home improvement companies offering windows, doors, conservatories and more nationwide; competes with Silverline across the same residential product categories but at far greater scale and geographic reach.

Others

• Rockdoor: UK manufacturer of composite doors and a Silverline supplier partner; comparable as an upstream ecosystem participant in the same window/door supply chain rather than a direct sales competitor.
• Origin: UK aluminium bi-fold door and window manufacturer that supplies Silverline; relevant as a partner/OEM in the same product category rather than a competing installer.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

• Instagraminstagram.com/silverlinewindowsofficial/?hl=en
• Facebookfacebook.com/profile.php
• LinkedInlinkedin.com/company/silverline-windows-limited

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Silverline Windows