Installing a wide range of replacement and new build fenestration products in a property or structure.
Apprentices learn to install a wide range of fenestration products, including windows, doors, bi-fold doors, and conservatories, across new build and refurbishment sites. Training covers the full installation process: reading specifications, preparing apertures, removing existing frames, fixing new products level and plumb, applying sealants, and fitting trims and hardware. Materials covered include PVC-U, aluminium, steel, timber, and composites. The programme also builds knowledge of relevant Building Regulations, energy performance standards, glazing systems, and health and safety requirements including working at height.
A typical week involves travelling to domestic or commercial sites, checking deliveries against specifications, and preparing work areas safely before installation begins. Apprentices remove old windows or doors, prepare the aperture, and fit replacement or new products, checking for level and plumb throughout. They apply weatherproofing sealants, cut and fix trims, and complete quality checks before handover. Work is often done as part of a two-person team, with regular interaction with site managers, other trades, and end customers, including homeowners and landlords.
Completing this apprenticeship leads directly to roles such as fenestration installer or window and door fitter, working for local installation companies, national manufacturers, or main contractors on residential and commercial developments. With further training, progression routes include surveying, curtain walling installation, and work on high-rise buildings under the post-Grenfell regulatory framework. Experienced installers can move into supervisory or team leader roles, or develop into self-employment servicing the domestic and light commercial market.
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Completing this apprenticeship typically leads to work as a Fenestration Installer, Window and Door Installer, or Window Fitter, operating with minimal supervision across domestic and commercial sites. Day-to-day responsibilities include removing existing windows and doorsets, installing replacement and new-build products across PVC-U, aluminium, timber and composite materials, applying wet sealants, fitting glazing units, and ensuring all work meets Building Regulations and manufacturer specifications.
With a few years of installation experience, installers commonly move into Lead Installer or Installation Supervisor roles, taking on responsibility for a small crew and quality-checking completed work. The deep-specialist route leads toward Curtain Walling Installer or High-Rise Fenestration Specialist, both of which carry additional regulatory requirements following the Building Safety Act. On the broader construction pathway, experienced installers sometimes retrain as Fenestration Surveyors or move into estimating and technical sales, drawing on their practical site knowledge.
Most hiring comes from glazing and fenestration contractors, ranging from small local firms fitting domestic replacement windows to large national companies supplying and fitting products across housing developments, commercial offices and public sector buildings. Social housing retrofit programmes, new-build residential developers and commercial fit-out contractors are consistent sources of demand. Both the private and public sectors hire for these roles, and self-employment is a common longer-term option once experience and client networks are established.
Throughout the apprenticeship, learning takes place on the job, with the apprentice developing practical installation skills alongside the theoretical knowledge required to work across a range of fenestration products and building types. Before moving to final assessment, the apprentice must pass through a readiness check, commonly called the gateway, where the employer and training provider confirm that the apprentice has met the required standard across the knowledge, skills and behaviours in the specification. Final assessment then confirms whether the apprentice can perform the role competently and independently. Assessment models for many standards are currently being updated, so check the standard's gov.uk page for the current specification.
Building a clear record of workplace evidence throughout the apprenticeship is important, rather than trying to piece it together at the end. This means documenting real installations, recording how health and safety requirements were applied on site, and keeping notes on the range of products and materials worked with. Close communication with the employer and training provider about progress and any gaps in experience will help ensure gateway readiness. The broader the range of installation situations covered during the programme, the stronger the evidence base will be.
Look for providers with practical workshop or training centre facilities where apprentices work with real fenestration products across multiple materials, including PVC-U, aluminium, timber, and composite. Providers should be able to demonstrate that apprentices practise actual installation tasks: fitting, levelling, glazing, wet sealing, and temporary structural support during removal. An achievement rate above 65% is a reasonable baseline for this standard; above 75% is strong. Check that the provider covers the full Building Regulations knowledge the standard requires, not just the basics, and that employer satisfaction scores reflect genuine on-site engagement rather than classroom-only delivery.
Be cautious of providers whose training centres lack hands-on installation rigs or who rely heavily on online or classroom delivery for what is a practical, on-site trade. If a provider cannot explain how they assess working at height, COSHH, and safe removal of existing frames in realistic conditions, that is a gap. High learner volumes paired with a declining or below-average achievement rate warrants scrutiny. Vague answers about how they coordinate with your site supervisors during the on-the-job element suggest weak employer engagement.
There are no nationally mandated entry qualifications for this apprenticeship, but employers typically look for a reasonable level of literacy and numeracy, as apprentices must read specifications, interpret diagrams and complete documentation. Practical aptitude is important given the hands-on nature of the work. Apprentices must be in paid employment with an employer who can provide real installation work across the range of products and materials covered by the standard.
The typical duration is 18 months, though this can vary depending on prior experience and how quickly an apprentice progresses. Apprentices are employed throughout, working on live installations while completing off-the-job training alongside their day-to-day duties. The current minimum off-the-job requirement is set out in the apprenticeship funding rules, which are subject to revision under ongoing Skills England reforms. Check gov.uk for the latest figure before planning your programme.
Before the end-point assessment, apprentices must pass through a gateway. At that point they must demonstrate they have met the required knowledge, skills and behaviours. The end-point assessment tests competence in the occupation, but the specific assessment methods for many standards are being reviewed. Check the current assessment plan on the Institute for Apprenticeships and Technical Education page for this standard on gov.uk to confirm what formats apply before enrolling.
The funding band for this standard is £9,000, which is the maximum government contribution toward training and assessment costs. Larger employers with a levy account use those funds. SMEs without a levy account pay 5% of the training cost and the government covers the remaining 95%. If you are a non-levy employer taking on an apprentice aged 16 to 18, the training is fully funded by the government. Speak to your chosen training provider about how to access the funding.
Apprentices work on site installing windows, doors, bi-fold doors, conservatories and rooflights in both domestic and commercial properties. Tasks include removing existing frames, preparing apertures, checking products against specifications, fitting and levelling units in PVC-U, aluminium, timber or composite materials, applying sealants and weatherproofing, and glazing units correctly. They also handle, load and store products safely, carry out tool checks, and interact with clients, site managers and other trades throughout the working day.
Completion leads to job titles such as window and door installer or window fitter, with the ability to work with minimal supervision across a range of products and building types. From there, further training can open routes into curtain walling installation, fenestration surveying, or work on high-rise and high-risk buildings governed by post-Grenfell regulations. Some installers move into supervisory roles or progress toward fabrication and technical functions within larger fenestration companies.
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Curated by Alex Lockey, FATP founder and editor. Last reviewed: .
Sources include the apprenticeship's official specification on apprenticeships.gov.uk, Skills England guidance, IfATE archive records, DWP funding bands, and provider data sourced directly from the public Apprenticeship Provider and Assessment Register (APAR). Standard reference: 513.
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