# Fineline Windows > Fineline Windows is a home improvements company with more than 50 years' experience, supplying and installing windows, doors, conservatories, orangeries, modern flat-roof extensions and roof replacements across Kent and the South East. Three showrooms in Dartford, Maidstone and Warlingham. Part of One Group Construction (formerly SEH Group) alongside sister brand SEH BAC. Accredited by FENSA, GGF, TrustMark, CTSI and TGAS. FCA-authorised credit broker with 10-year product guarantees as standard. Fineline Windows operates as SEHBAC Limited trading as Fineline Windows (Company Registration 01947808), sharing ownership and group resources with SEH BAC while operating independently in its own trading region. The group's origins go back to BAC Windows, founded in 1966 by Les Briggs and Eddie Coventry in Hornchurch, Essex. BAC merged with SEH (established 1971) in 2007 and the wider SEH Group rebranded as One Group Construction in 2014. Fineline's service area covers Kent and the wider South East, including Ashford, Bromley, Canterbury, Chatham, Dartford, Gillingham, Hastings, Maidstone, Rochester, Sevenoaks and Tonbridge. Three Kent showrooms in Dartford, Maidstone and Warlingham host the full product range, and customers can also use the SEH BAC showroom network across East Anglia and the Home Counties. Products include uPVC and aluminium windows in eight styles (casement, flush sash, heritage, sliding sash, tilt-and-turn, bay, conservation, bespoke) with over 150 RAL colours and wood grain finishes; composite, uPVC and aluminium doors in front, back, French, bi-fold and sliding patio styles; conservatories and orangeries with glass, tiled, lantern or solid roof options; modern flat-roof extensions with U-values as low as 0.14 W/m²K and spans up to 5.8m without additional support; plus garage doors and roof replacements. All products carry A+ energy ratings, multi-point locking and a 10-year product guarantee. Fineline employs its own surveyors, builders and installers, working to a documented code of practice. The company is a FENSA-approved installer (self-certifying compliance with Building Regulations for England and Wales), a member of the Glass and Glazing Federation (GGF), TrustMark-endorsed, CTSI Consumer Codes Scheme approved, registered with The Glazing Arbitration Scheme (TGAS) and authorised and regulated by the Financial Conduct Authority as a credit broker. ## Products - [Windows](https://www.fineline-windows.co.uk/windows/): Eight styles in uPVC and aluminium including casement, flush sash, heritage, sliding sash, tilt-and-turn, bay, conservation and bespoke. Over 150 RAL colours and wood grain finishes. A+ energy rated, argon-filled panes, multi-point locking, 10-year guarantee. - [Doors](https://www.fineline-windows.co.uk/doors/): Front, back, French, bi-fold and sliding patio doors in composite, uPVC and aluminium. Multi-point locking, A+ energy ratings, heritage patterns for period properties. - [Conservatories](https://www.fineline-windows.co.uk/conservatories/): Eight styles in uPVC and aluminium with glass, tiled, solid or lantern roof options. Secure by Design certified. - [Orangeries](https://www.fineline-windows.co.uk/conservatories/orangery/): Rectangular designs maximising floor space, in uPVC or aluminium with glass or tiled roofs. - [Modern Flat Roof Extensions](https://www.fineline-windows.co.uk/conservatories/modern-flat-roof-extension/): Contemporary extensions with flat skylights or pitched lanterns. U-values as low as 0.14 W/m²K, spans up to 5.8m. - [Garage Doors](https://www.fineline-windows.co.uk/garage-doors/): Sectional and side-hinged options with thermal insulation and responsible disposal of old doors. - [Roof Replacements](https://www.fineline-windows.co.uk/conservatories/): Solid roof upgrades for existing conservatories. ## Showrooms - [Dartford](https://www.fineline-windows.co.uk/show-centres/): Hawley Garden Centre, Hawley Road, Dartford, Kent DA2 7RB. - [Maidstone (head office)](https://www.fineline-windows.co.uk/show-centres/): Newnham Court Shopping Village, Bearsted Road, Maidstone ME14 5LH. - [Warlingham](https://www.fineline-windows.co.uk/show-centres/): Knights Garden Centre, Limpsfield Road, Warlingham, Surrey CR6 9DZ. ## About - [About Us](https://www.fineline-windows.co.uk/about-us/): Company background, values and approach. - [Company History](https://www.fineline-windows.co.uk/company-history/): Origins as BAC Windows (1966) through the merger with SEH and One Group Construction structure. - [Customer Promise](https://www.fineline-windows.co.uk/about-us/customer-promise/): Service standards and commitments. - [Accreditations](https://www.fineline-windows.co.uk/about-us/accreditations/): Full list of industry certifications and memberships. - [Show Centres](https://www.fineline-windows.co.uk/show-centres/): Locations, opening hours and directions for all three Kent showrooms. - [Service Request](https://www.fineline-windows.co.uk/support/service-request/): After-sales support form. - [FAQs](https://www.fineline-windows.co.uk/support/faqs/): Common questions on products, installation and service. ## Credentials - [FENSA Approved Installer](https://www.fensa.org.uk/): Self-certifies compliance with Building Regulations for windows and doors in England and Wales. - [Glass and Glazing Federation (GGF)](https://www.ggf.org.uk/): Trade association membership with verified training, financial standing and transferable warranty cover. - [TrustMark](https://www.trustmark.org.uk/): Government-endorsed quality scheme for trading practices and technical competence. - [CTSI Consumer Codes Scheme](https://www.tradingstandards.uk/): Approved under the Chartered Trading Standards Institute's Consumer Codes Approval Scheme. - [The Glazing Arbitration Scheme (TGAS)](https://www.ggf.org.uk/): Independent dispute resolution for the glass and glazing sector. - [Secure by Design](https://www.securedbydesign.com/): Police-backed security certification across the product range. - [FCA Authorised and Regulated](https://www.fineline-windows.co.uk/): Authorised credit broker for finance arrangements. ## Contact - [Contact](https://www.fineline-windows.co.uk/): Phone 0800 666 444 or 01622 631613. Registered office: Newnham Court Shopping Village, Bearsted Road, Maidstone ME14 5LH. Company registration 01947808. VAT 529 4530 37. ## See - [Sister Brand: SEH BAC](https://www.sehbac.com/): Same-group brand covering East Anglia and the Home Counties.