Solar Windows

What Solar Windows does

Solar Windows Limited is a privately held, founder-led UK commercial fenestration contractor, headquartered and manufacturing in Caerphilly, South Wales, operating across England and Wales. The company designs, manufactures, and installs PVCU and composite aluminium window and door systems — including a 70mm suite of casement, flush, tilt & turn, reversible, AOV smoke-ventilation, and vertical-sliding sash windows; residential and patio doors; Alutop and Warmcore composite aluminium products; roofline systems; curtain walling; and an FD30s GRP fire-door sub-brand ('Fire Doors by Solar'). The portfolio is built on profiles from leading UK PVCU system suppliers, with an in-house CAD department executing an A-Status sign-off process and a dedicated Technical Manager handling wind-load, glass, and U/G-value calculations.

The firm serves five primary verticals: private & social newbuild developments; social housing refurbishments (30 years' operating history across England and Wales); education (decades of experience including Building Schools for Future schemes such as the £14M Five Islands School project); hotel & leisure (20 years); and Ministry of Defence contracts. Customers include local authorities, housing associations, education institutions, and developers such as Crest Nicholson, with relationships structured through framework agreements (e.g., LHC U10 PVCU Windows & Door sets) and open-book commercial terms.

Revenue is generated through project-based commercial contracts on a supply-and-install or supply-only basis, with pricing determined per project rather than via a published price list. The sales motion is enterprise field sales led by a Commercial Sales Manager and an estimating team, supported by case-study-led content marketing. Certificant coverage is unusually broad for the segment — including ISO 9001:2015, ISO 14001:2015, BS 7412 Kitemark, Secured By Design, PAS 24, BlueSky, FENSA, Constructionline, CHAS, EN1634-1/-3, and EN12101-2 — and the manufacturing plant operates on solar power with a stated zero-carbon production footprint and 88% waste-recycling rate.

Name

Solar Windows

Legal name

Solar Windows Limited

Website

https://solarwindows.co.uk

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

251–500 employees

Short description

Solar Windows Limited is a UK commercial fenestration contractor, founded in 1989 and based in Caerphilly, South Wales, that designs, manufactures, and installs PVCU and aluminium windows, doors, curtain walling, roofline products, and certified FD30s fire doors for social-housing refurbishments, education, hotel/leisure, MOD, and private/social newbuild projects across England and Wales.

Ownership category

akta.pro rank

Product category

Commercial Fenestration Products

NAICS

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

SIC

Glass Products, Made Of Purchased Glass (3231)

akta.pro primary industry

Windows (IMADAIAC)

Keywords

• Commercial fenestration products
• PVCU window systems
• Composite aluminium windows
• Fire door manufacturing
• Social housing refurbishment

Headquarters

HQ city

Bedwas

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Manufacturing and Installation of Windows and Doors: Design, manufacture, and installation of commercial PVCU and aluminium fenestration products including windows, doors, composite doors, and curtain walling. Revenue generated through project contracts with supply-and-install or supply-only options.
2. Supply of Building Products: Supply-only contracts for PVCU windows, doors, roofline products, and fire doors to contractors and builders.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Solar Windows designs, manufactures, and installs commercial PVCU and composite aluminium fenestration products including windows, residential and fire doors, curtain walling, and roofline products. The company operates a 'one stop shop' model from its Caerphilly manufacturing facility, providing in-house CAD design, technical backup, supply-and-install or supply-only options for projects across England and Wales.

Product overview

Solar Windows is a specialist commercial window contractor offering a comprehensive fenestration product portfolio. The core offering consists of PVCU window systems (casement, flush, tilt & turn, reversible, AOV smoke ventilation, and vertical sliding sash) and PVCU door products (single and double residential doors, sliding patio doors), all in 70mm profile depth. These are complemented by composite aluminium solutions through the Alutop PVCU Composite Window (Passivhaus-certified) and Warmcore sub-brand lines. Supporting products include roofline systems (fascias, soffits, barge boards) and FD30s GRP Fire Doors with EN1634-1/EN1634-3 certification. The company also offers curtain walling systems. Services include in-house CAD department for project drawings, full technical backup, and ongoing customer support. Operating across England and Wales from Caerphilly, South Wales, the company serves sectors including private/social newbuild, social housing refurbishments, education, hotel/leisure, and Ministry of Defence contracts.

Differentiator

Problem solved

Functional benefit

Brands

• Fire Doors by Solar: A dedicated brand for FD30s GRP Fire Doors, fully certified with EN1634-1 and EN1634-3 standards, UKCA marked, with certification through BlueSky, ACDM, and ASDMA.
• Warmcore
• Alutop PVCU Composite Windows

Products and services

• 70mm Open Out Casement Window Chamfered PVCU casement window with traditional putty line finish for newbuild, commercial and refurbishment markets. Can achieve U-values of 0.8 W/m2K using triple glazed Argon sealed units.
• 70mm Flush Casement Window PVCU flush window replicating traditional timber flush fit window detailing, with PAS24 security accreditation and excellent weather performance.
• 70mm Tilt & Turn Window Inward opening PVCU window allowing maximum ventilation via top tilt-inward or full side opening. Ideal for fire escape and easy cleaning where external access is restricted.
• 70mm Fully Reversible Top Swing Window PVCU reversible window with 180-degree rotation allowing external face cleaning from inside, maximising natural light with contemporary appearance.
• 70mm Automatic Opening Vent (AOV) Window Smoke ventilation window tested to EN12101-2 for smoke extraction using SE Controls actuator with cycle testing at 300 degrees for reliability.
• PVCU Vertical Sliding Sash Window Heritage Vertical Slider with traditional timber sash aesthetics, approved for conservation areas. Features tilt-inward cleaning and triple brush seals.
• 70mm Single Residential Door (Open In / Out) Residential PVCU door available in open-in and open-out styles with low threshold options for Part M Building Regulations compliance. Compatible with 70mm window systems.
• 70mm Double Residential Door (Open In / Out) Welded PVCU double door with 2, 3, and 4 pane options. Features double brush seals on all four sides and slim visible faces with 70mm frame depth.
• 70mm PVCU Inline Sliding Patio Door Sliding patio door with cross-section design for smooth operation and thermal performance.
• Alutop PVCU Composite Window Lightweight high-stability composite window using RAUFIPRO high-tech material with Passivhaus certification, achieving 0.73 W/m2K with triple glazing and exceptional acoustic performance.
• Warmcore Aluminium Windows & Doors Aluminium window and door system with full-width thermal core combining aluminium durability with thermal efficiency. Includes casement, flush sash, tilt & turn, French windows, single/double/bi-fold doors, and sliding patio doors.
• Roofline Products Fascias, soffits, barge boards, and soffit ventilators in PVCU. Rot and decay resistant alternative to traditional materials.
• FD30s GRP Fire Doors Certified fire protection doors tested to EN1634-1 (Fire) and EN1634-3 (Smoke) with PAS 24-2022, Secured By Design, and UKCA Marking; offered under the 'Fire Doors by Solar' sub-brand.
• Composite Curtain Walling System Curtain walling system combining aluminium, steel and polymer materials providing thermal performance with Uf value up to 0.88 W/m2K, delivered on projects including Yate Academy, Bristol.

Quantifiable outcome

• 88% of waste recycled or converted to RDF for power stations
• +3 more outcomes

Named customers7 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Social Housing Landlords and Housing AssociationscoreOthersLong-term partnerships based on honesty and trust within framework agreements and open-book principals. Customer base includes diverse local authorities and housing associations throughout the UK. Company engages with tenants at every step of the way during refurbishment projects.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Senior Architectural Systems: UK aluminium fenestration systems manufacturer focused on commercial windows, doors and curtain walling. Comparable in product mix to Solar Windows' aluminium range and competes for similar commercial and education sector projects.
• Safestyle UK: UK PVCU window and door installer with strong social housing and domestic refurbishment exposure. Closest like-for-like peer in customer mix (housing associations, local authorities) though more residential-weighted than Solar Windows' commercial focus.
• Reynaers Aluminium UK: Aluminium window, door and curtain wall systems manufacturer serving commercial and high-end residential UK projects. Competes directly with Solar Windows' aluminium curtain walling and composite aluminium offering on education and commercial tenders.
• AluK (UK): Aluminium window, door and curtain walling systems supplier for commercial construction in the UK. Directly comparable to Solar Windows' Warmcore and composite aluminium ranges, particularly for commercial newbuild and education projects.

Broad incumbents

• Eurocell plc: UK-listed PVCU and aluminium window/door manufacturer with a national branch network and significant social housing exposure. Comparable as a direct competitor in commercial fenestration but at materially larger scale, with vertically integrated profile extrusion that Solar Windows lacks.

Emerging players

• Selecta Systems: UK PVCU profile systems supplier with fabricator network serving commercial and social housing markets. Smaller-scale competitor with overlapping customer base in local authority and housing association refurbishment tenders.
• Profile 22 (Epwin Group): PVCU window and door profile manufacturer serving UK commercial and social housing fabricators. Comparable systems-level competitor with significant overlap on social housing framework products.

Others

• Aluplast UK: PVCU profile systems manufacturer serving UK fabricators targeting commercial and residential newbuild. Direct upstream competitor to fabricators competing against Solar Windows in social housing and education tenders.
• REHAU UK (Windows Division): Major PVCU profile systems supplier whose fabricator network competes for the same social housing framework business. Comparable on product specification but operates primarily as a systems house rather than direct installer like Solar Windows.
• Veka UK: One of the largest PVCU profile systems manufacturers in the UK, supplying fabricators that compete head-to-head with Solar Windows for social housing and commercial contracts. Acts as both supplier and ecosystem competitor.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance13 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

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 Solar Windows