Anglian: uPVC and aluminium windows, doors and conservatories

Anglian Home Improvements sells six window styles in three frame materials: uPVC, aluminium and timber, covering casement, sash, bay and tilt and turn designs¹. Nearly all its windows are A-rated for energy efficiency with double glazing, rising to A++ with triple glazing in the flush uPVC style, and its aluminium windows carry a U-value of 1.4 W/m²K as standard². Windows and doors come with a 10-year guarantee and a 15-year sealed unit guarantee².

Anglian Home Improvements is a trading name of ASHI Group Limited⁴. It states that it has led the way in installing energy-efficient windows across the UK for over 55 years⁶. It holds accreditations from more than 12 industry bodies, including BBA certificates, FENSA, the Glass and Glazing Federation, TrustMark and BSI Kitemarks, with 10 Kitemark accreditations in total and six of those for windows alone⁶.

For a household, the relevance is fabric rather than fuel. Windows and doors are the part of the envelope that a householder can change without touching the structure, and the energy rating, the U-value and the guarantee term are the three figures that decide what the change is worth. What remains is dependence: on a manufacturer's survey and installation, on a guarantee held by a private company, and on the gas or electricity that still heats the home afterwards.

What Anglian sells: six window styles in three materials

The range is organised by style first and material second. Casement windows are available in uPVC, wood and aluminium, and as triple glazed in uPVC only³. The uPVC range covers casement, flush, sash, tilt and turn and fully reversible styles, the last built on a multichambered frame so the sash can be turned inwards for cleaning from inside⁴. Timber runs to casement, flush casement and sash, all made to measure and described as bespoke¹⁰. Bay windows are available in every material and glazing option, including casement, flush casement and sash styles rated B to A++³.

Triple glazing is narrower than the double glazed range: it comes in uPVC and only in casement, flush casement and tilt and turn styles¹³. That is a real limit for anyone wanting a triple glazed sash or bay in timber, and it is worth knowing before a survey rather than after.

Doors are glass-panelled and double glazed as standard, with triple glazing available in uPVC¹⁴. Anglian also sells porches, and states that it handles planning applications and paperwork where a porch needs permission¹⁵.

Energy ratings: A-rated as standard, up to A++ in flush uPVC

Anglian's headline position is that double glazed windows are A-rated as standard for energy efficiency, and that nearly all its windows are A-rated with double glazing and up to A++ rated for triple glazing with flush uPVC². The uPVC range is described as A or A+ with double glazing as standard, and the energy-efficient uPVC windows as A rating or higher as standard, with ratings reaching A+ and A++⁴.

The figures vary by product, and the variation is worth reading carefully rather than taking the headline. Double glazed windows are described elsewhere as B to A+ rated depending on material and style¹⁶. Sash windows reach up to A+ in uPVC and up to A in wood³. Georgian windows are offered at A++, A+ and A ratings across double and triple glazing¹⁷. The aluminium range carries a U-value of 1.4 W/m²K as standard, and the same figure appears on the general windows and doors page³.

The reason the numbers differ is that a window energy rating is a whole-window calculation covering frame, glass, spacer and solar gain, while a U-value measures heat transfer alone. A window can be A-rated on one basis and carry a U-value that looks unremarkable on the other. For a household, the rating is the figure that appears on the certificate and the U-value is the figure that goes into a heat loss calculation, and both are published per product rather than per brand.

Guarantees: 10 years on frames, 15 on most sealed units

The guarantee structure is consistent across the range. Windows and doors come with a 10-year guarantee and a 15-year sealed unit guarantee, and the 10-year cover is described as insurance-backed and covering parts and labour on all windows². The 10-year parts and labour guarantee is stated to be included in the double glazing price rather than sold as an extra²⁰.

Product pages repeat the same terms at the level of the individual window. The uPVC casement and flush casement windows carry a 10-year guarantee on frames, parts and labour, and the flush casement carries a 15-year guarantee on all sealed glass units²¹. The fully reversible uPVC window carries a 10-year guarantee on frames, parts and labour and a 15-year guarantee on the sealed glass unit⁵. Timber casement windows carry a 10-year guarantee on all hardware, including handles and hinges, and a 10-year guarantee on the sealed glass unit¹¹. Wooden flush casement windows carry a 10-year guarantee on hardware including hinges, handles and locks¹².

On failure of the glass, Anglian states that if a window forms condensation between the glass it will replace it free of charge, and that the sealed unit is covered in the event of a blow out, where the seal breaks²⁰. The 15-year term applies to the majority of sealed units rather than to all of them, and one page describes a 10 to 15-year guarantee on sealed glass units, so the term to expect depends on the product²⁰.

Security, ventilation and glazing fitted as standard

Security hardware is included rather than optional. Anglian states that toughened glass, steel shoot bolt locks and excluder devices are fitted as standard¹⁹. uPVC casement windows carry an anti-forcing device, steel shoot lock bolts and key-locking handles as standard, with robust welded joints and internal beading¹⁹. Bay windows have multipoint locking and key locking handles as standard²³. Casement windows are described as secured by shoot-bolt locks, key locking handles and toughened glass²⁴.

The uPVC sash range is Secured by Design approved in the Elite double-glazed specification, and the uPVC casement range is Secured by Design approved and carries PAS 24 Kitemarks⁸. Secured by Design is a police-backed standard, so the approval is a third-party mark rather than a maker's claim.

Ventilation is the part of a window replacement that households most often overlook. Replacing windows reduces background air leakage, and the building regulations that govern replacement glazing also govern the ventilation that has to be provided. Anglian's cottage windows are supplied with double glazing and astragal bars fitted outside and inside, which affects both the appearance and the profile of the frame²⁶. Where a home has been made more airtight, the ventilation question is dealt with under Part F and in the wider guide to home ventilation.

Colours, decorative glass and made-to-measure design

Every window is made to measure. uPVC casement windows are made to measure for the home and individually priced, and timber casement windows are made to measure to fit any opening²⁵. Edwardian style windows are made to measure in any size²⁷.

Colour choice is broad. Wooden bay windows are offered in more than 200 colours, and wooden windows in nine standard colours and stains or over 200 RAL options²³. Wooden flush casement windows list White Knight, Anthracite Grey, Jet Black, Dark Woodgrain Stain, Eucalyptus, Fir Green, Golden Oak Stain, Ivory and Olive Green among the standard range, plus over 200 near-match RAL colours¹².

Decorative glass is a separate choice. Anglian offers cottage bars, decorative glass and unique handles such as monkey-tail handles, and the double glazing range allows a choice of window style, frame material and colour plus decorative, stained, leaded or obscure glass¹⁹. Tilt and turn windows come with plain, decorative or obscure glass options or a design of the householder's own⁶. Georgian windows offer decorative leaded glass in diamond, square and Queen Anne patterns, and Edwardian windows can be customised to match original leaded and coloured glass designs¹⁷.

What the price includes, the price match and finance

There is no published list price for an Anglian window. The price is quoted after a visit, and Anglian states that the price includes the home visit or remote quotation, the survey, manufacturing, installation and aftersales². The same inclusion list appears on the windows and doors page and on the black windows page¹⁸. The 10-year parts and labour guarantee is included in the double glazing price rather than charged separately²⁰.

The price match is limited to uPVC. Anglian states that if a householder finds uPVC windows that are the same as its own for a lower price with another company within 7 days, it will match the price⁹. Product pages repeat the same like-for-like price match on uPVC windows²⁵. It does not extend to aluminium or timber.

On discounts, the figures differ. Several product pages state up to £250 off a quote for filling in the online form, and one guidance page describes up to £250 as an additional online discount⁸. A separate offer of £50 off windows and doors, excluding garage doors, also appears in the material, and the two figures are not reconciled. Both should be read as promotional and subject to terms.

Finance is offered, and one representative example is published: a contract price of £6,106.49 on a 96-month agreement, stated as current as of August 2025⁵. That is a representative example rather than a price for a typical installation, and the VAT position of quoted prices is not stated in the material.

Accreditations and who stands behind the work

The certification position is unusually broad for a retail glazing company. Anglian holds 10 Kitemark accreditations, six of them for windows alone⁶. Its uPVC range carries BBA certificates, British Fenestration Rating Council certification, Glass and Glazing Federation membership, FENSA and CERTASS certificates for building regulation compliance, and the Made in Britain marque⁴. The uPVC casement range is BFRC-certified and carries British Standards and PAS 24 Kitemarks, a BBA certificate on White Knight, Secured by Design approval, FENSA and GGF accreditation and a BSI Kitemark²⁵. The uPVC flush casement range carries BFRC, FENSA, GGF, Secured by Design, BSI Kitemark, BBA and TrustMark²².

Timber carries its own set. Wooden flush casement windows are FENSA and GGF accredited, FSC-certified, BFRC accredited, BSI Kitemark, BBA certified and TrustMark registered¹². Timber casement windows are FENSA and GGF accredited and installed in line with the latest building regulations¹¹. Wooden windows generally are FSC-certified²⁸.

Two of these matter more than the rest for a household. FENSA or CERTASS registration is what produces the building regulation compliance certificate that a solicitor asks for at sale, and the rules around it are set out in replacement window rules. TrustMark is a government-endorsed quality scheme, and the checks it involves are covered in finding an installer.

Anglian as a company: Made in Britain, ASHI Group

Anglian Home Improvements is a trading name of ASHI Group Limited⁵. The company states that it has led the way in installing energy-efficient windows across the UK for over 55 years²⁴.

Manufacturing is in Britain. Windows are described as made right here in the UK and carrying the Made in Britain marque, designed and individually manufactured in Britain, and cottage windows as made from start to finish in a British factory by British craftspeople¹. Wooden casement windows are manufactured in the UK, and wooden flush casement windows are made to order and manufactured in the UK with strict quality control checks at each stage¹¹. Each window is made to the unique specifications of the home and quality checked before installation⁴.

The company also operates a recycling route for removed products, stating that parts of old windows and doors are recycled into loft insulation, plastic pipes and non-visible areas of new windows and doors²⁹.

Ordering, lead times and the pre-Christmas deadline

There is no instant online quote. Anglian states that a virtual or in-home appointment is required, and the process runs in four steps: a home or virtual visit, a technical survey, UK manufacture, then installation¹⁹. A remote quotation can be arranged by contacting the company³⁰. Quote requests are taken on 0800 500 600 and general enquiries on 0800 014 2106²⁴.

Fitting itself is quick once the windows arrive. Anglian states that fitting new windows and doors should take one to two days for skilled installers, and that its team arranges a convenient time to fit them¹⁸. The lead time sits in survey and manufacture rather than in the fitting.

That lead time is why the company publishes a Christmas deadline. Anglian set 5:59pm on 20 October 2026 as the order deadline for windows to be fitted before Christmas 2026, with terms and conditions applying⁹. The same deadline appears on its porch and roofline pages¹⁵.

Planning permission, conservation areas and grants

Anglian states that replacing an existing bay window is likely to need no planning permission, but that adding a new one, or living in a conservation area or a listed building, may differ, and that it takes care of planning permission requirements²³. Cottage windows may need planning permission in a conservation area, and Anglian handles applications²⁶. Changing window colour to black usually does not need permission, but listed homes and conservation areas are likely to²⁸. Wooden windows are described as suitable for conservation areas and listed buildings¹⁰.

Planning permission and listed building consent are separate regimes administered by local authorities, and the general position is set out in planning permission for windows and listed buildings.

On grants, the position is unambiguous. Anglian states that it does not offer double glazing grants, though grants may be available through other organisations³¹. Grant funding for glazing in the UK comes from government and supplier obligation schemes, and the four nations run different schemes, covered in the guides to England, Scotland, Wales and Northern Ireland.

Where the range has limits

The dependence a household takes on is a manufacturer's survey, a manufacturer's installation and a guarantee held by a private company. Anglian's guarantee is insurance-backed, which is a stronger position than an unbacked promise, but it is still a term in a contract with a trading company rather than a statutory protection. The failures of other large glazing firms show what that means in practice, and the pattern is set out in the accounts of Everest and Safestyle.

The second limit is technical. Triple glazing is available in uPVC only and only in three styles, so a household wanting triple glazed timber sash or bay windows cannot have it from this range¹³. The price match covers uPVC only, so aluminium and timber buyers have no equivalent protection⁹.

The third is the one that applies to every window replacement. New glazing reduces heat loss through the frame and glass, and it also reduces background ventilation. Where a home is then insulated further, the moisture balance changes, and the consequences are covered in condensation, damp and mould and in the comparison of double and triple glazing. Windows are one measure in a fabric plan, not a substitute for one, and the order of works is set out in whole-house retrofit planning.