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RetrofitInternal wall insulation and energy upgrades installed under PAS 2030/2035 — improving EPC ratings, cutting energy demand and keeping homes warmer, all delivered and evidenced by one accountable team.
We deliver fabric-first retrofit measures designed and installed to current standards, helping social landlords, housing associations and commercial clients improve EPC ratings and reduce energy demand.
Our work follows the PAS 2030/2035 framework, with internal wall insulation systems installed to manufacturer and BBA certification requirements.
Beyond installation, we offer the full assessment and coordination side of retrofit — retrofit, occupancy and ventilation assessments through to a complete Retrofit Coordinator service — so a project can be delivered end to end under one accountable team.
Laminate and stud IWI systems installed to certified detail, with method sheets for operatives.
Domestic EPC assessment and guidance on measures that improve ratings.
Fabric upgrades coordinated with ventilation strategy to manage moisture risk.
Slimline aluminium secondary glazing fitted inside existing windows — ideal for period and listed properties, cutting heat loss and noise.
Sealing gaps around windows, doors and floors to remove cold spots and reduce wasted heat.
Replacement insulated entrance and external doors that cut heat loss and draughts at the threshold.
Documented installation procedures, available bilingually for site teams.
Pre-install surveys and measure specification to suit the property and framework.
Installation records and certification compiled for funding and compliance.
Whole-dwelling retrofit assessments under PAS 2035, capturing condition, fabric and RdSAP data to inform the improvement plan.
Assessment of how the property is used and heated, so measures suit the household and reduce unintended consequences.
Existing ventilation assessed before and after measures to manage moisture and indoor air quality in line with the framework.
End-to-end Retrofit Coordinator service under PAS 2035, managing assessment, design, installation and evaluation across every measure.
Indicative annual savings for a typical gas-heated semi-detached home — alongside warmer, healthier rooms and lower carbon.
The biggest fabric saving, on homes with solid walls.
Where walls have an unfilled cavity.
Topping up to the recommended 270mm.
Sealing gaps around windows and doors.
Cuts heat lost through windows by around two-thirds (U-value from ~5.6 to ~1.8) and reduces noise.
Replacement insulated doors cut heat loss and draughts at the entrance.
Indicative figures from the Energy Saving Trust for a typical gas-heated semi-detached home in Great Britain. Actual savings depend on the property, energy prices and how the home is used — we'll advise on the right measures for yours.
Our slimline aluminium secondary glazing fits discreetly inside the existing window, making it ideal for period and listed properties where the original windows must be retained.
Energy: a single-glazed window has a U-value of around 5.6; with secondary glazing this drops to about 1.8–1.9, and Low-E glass reflects heat back into the room.
Noise: a clear reduction in external noise, helping rooms meet recommended indoor levels (bedrooms 30–35 dB).
Draughts: seals the window opening, removing cold spots around the room.
Compliant retrofit depends on the assessments and coordination that sit around the installation. We deliver each of these as standalone services or as part of a coordinated programme.
A whole-dwelling retrofit assessment captures the building's construction, condition, fabric and existing services, recording RdSAP data and any defects that affect the improvement plan. It is the evidence base every PAS 2035 project is built on.
We assess how the home is actually lived in — heating patterns, vulnerability, comfort and how the household uses each room — so the recommended measures fit the occupants and reduce the risk of unintended consequences.
Adding insulation changes how a building breathes. We assess existing ventilation before works and confirm provision afterwards, protecting indoor air quality and managing condensation and moisture risk in line with the framework.
Our Retrofit Coordinator ties the whole project together — commissioning assessments, securing the retrofit design, overseeing installation and arranging evaluation — giving clients a single point of accountability from survey to handover.
A clear, framework-aligned route from first survey to evidenced handover.
Retrofit, occupancy and ventilation assessments establish the property's condition and how it is used.
A medium-term improvement plan and retrofit design set out the right measures in the right order.
The Retrofit Coordinator manages risk, sequencing and compliance across every measure on the project.
Accredited operatives install certified systems to manufacturer detail, with method statements on site.
Post-installation checks and ventilation confirmation verify the work performs as designed.
Records, certification and lodgement compiled into a complete pack for funding and compliance.
Planned and responsive retrofit programmes for local authority housing stock.
Fabric-first upgrades that raise EPC bands across mixed portfolios.
Energy improvements coordinated around building use and occupancy.
Individual homeowners seeking warmer, more efficient and healthier homes.
Our assessment, coordination and installation records are produced to the standards that grant-funded and framework work demands, so evidence is in place when it is needed.
We work with clients delivering against current government and local authority retrofit schemes, compiling the documentation required for lodgement and audit.
Several government schemes can fund retrofit measures for eligible homes and social housing. Criteria change regularly, so we help confirm what applies to your property or portfolio.
The Energy Company Obligation funds insulation and heating measures for eligible households.
GBIS helps fund insulation across a broad range of homes.
Funding to decarbonise and upgrade social housing stock.
Lets local authorities extend ECO funding to households outside the standard criteria.
Grants towards low-carbon heating such as heat pumps for eligible properties.
Council and regional retrofit programmes delivered via framework partners.
Tell us about the home, block or portfolio and we'll check the likely funding routes and arrange a survey.
Check funding & book a surveyAssessment, design coordination and installation under one roof, removing gaps between separate suppliers.
Work delivered to PAS 2030/2035, with BBA-certified systems and public-sector contract insurance in place.
Ventilation assessed alongside fabric measures to protect indoor air quality and manage condensation risk.
Photographic evidence and certification compiled into handover packs built for funding and compliance.
Trained, assessed installers working to documented method statements on every site.
Occupancy assessment keeps the household at the centre, reducing disruption and unintended consequences.
Insulation and draught-proofing make a home more airtight — so ventilation has to keep pace. It's a PAS 2035 requirement and the front line against condensation, damp and mould, which now carry real legal weight for landlords under Awaab's Law. We assess ventilation before measures and confirm it after.
A PAS 2035 ventilation assessment of the existing provision, with a clear plan for what each room needs once the fabric is upgraded — sized to Approved Document F.
Trickle vents to windows and walls provide controlled, continuous fresh air without the heat loss of opening windows — the baseline for a healthy, airtight home.
Intermittent or continuous extract (MEV) to kitchens and bathrooms removes moisture at source, stopping it spreading and condensing elsewhere in the home.
Positive input ventilation (PIV) and mechanical ventilation with heat recovery (MVHR) for tighter homes — recovering warmth from extracted air while keeping it fresh.
Air has to be able to move from supply rooms to extract rooms. A 10 mm undercut beneath internal doors — or transfer grilles where undercuts aren't enough — keeps the whole system working. A small detail with a big effect on moisture.
Where condensation has already caused mould, we treat the cause as well as the surface — combining the right ventilation with insulation and, where needed, remedial works.
It's a whole-dwelling survey under PAS 2035 that records a property's construction, condition, fabric and services. It produces the RdSAP data and defect information used to plan compliant energy improvements.
It captures how the home is heated and used and whether occupants are vulnerable, so the recommended measures suit the household and avoid unintended consequences such as overheating or damp.
Yes — adding insulation makes a building more airtight, so ventilation must be assessed before and confirmed after works to protect indoor air quality and manage condensation and moisture risk in line with the framework.
Both. We provide retrofit, occupancy and ventilation assessments as standalone services, or take on full coordination and installation so the project is delivered end to end by one team.
We work to the TrustMark Customer Charter and operate a clear complaints procedure on every contract.
Send us the details and we'll respond with a clear, costed proposal.
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