Windows and doors
Reduce draughts, noise and heat loss at the openings — with certification and a guarantee behind the work.
- Typical install
- 1–3 days
- Disruption
- Moderate
- Funding routes
- Less common
Fewer draughts
Reduced outside noise
Improved security
Better condensation control
The basics
What windows and doors actually does
Replacement glazing and external doors can reduce draughts and heat loss. Funding is less common than for insulation and heating, so it is worth checking what is available locally.
This is likely to suit you if…
- Your glazing is single glazed or has failed seals
- You feel cold draughts around frames and doors
- Condensation regularly forms on the inside of the glass
- Your external doors are old and poorly sealed
Your options
Types of work an installer may recommend
Which option suits you depends on your property's construction, age and condition. A survey confirms what is possible.
Double glazing
The most common replacement glazing type.
Triple glazing
Additional pane for greater thermal performance.
Secondary glazing
Often used in listed or conservation properties.
Insulated external doors
Replacing older, poorly sealed doors.
Ventilation is part of the job
As openings are sealed, trickle vents and background ventilation keep moisture moving. A compliant installation accounts for this rather than treating it as an afterthought.
Step by step
How the journey usually runs
- 1
Initial eligibility check
- 2
Survey and measure
- 3
Manufacture
- 4
Installation and certification
Paying for it
Funding routes that may apply
Funding is never guaranteed. These are the routes most often used for this type of work in the UK.
Local authority schemes
Wider retrofit packages
Private purchase
Schemes that can cover windows and doors
Council Retrofit Partnership
A sample local authority delivered programme improving whole homes in specific postcode areas.
Who it may suit: Households within targeted areas, subject to property and income criteria.
InsulationSolarWindows and doors
Last reviewed: [Last reviewed date]
Affordable Warmth Support (NI sample)
A sample Northern Ireland programme delivered with councils for lower-income households.
Who it may suit: Northern Ireland households below a defined income threshold.
InsulationHeatingWindows and doors
Last reviewed: [Last reviewed date]
Initial results are indicative only. Final eligibility and funding are subject to checks by the relevant scheme, authority, funder or installer.
Be prepared
Questions worth asking an installer
What certification will I receive?
How will trickle ventilation be handled?
Are there planning or conservation restrictions?
What guarantee is provided?
Every installer listed with us is checked for accreditation and insurance before they appear in your matches.
Questions
Common questions
Read next
Related advice
Understanding your EPC rating
What the letter actually measures, why it matters to funders, and how to find yours.
5 min read
Keep exploring
Other home improvements
See what funding may apply to your home
A free check takes a couple of minutes, never affects your credit score, and shows the schemes and installers relevant to your postcode.