If you have searched for "free double glazing Wales" and landed on the Nest scheme, this page exists to set the record straight before you get your hopes up. Nest is a genuine and valuable scheme, but it funds insulation and heating, not windows. This is not a loophole to be found or a form to fill in more cleverly: replacement glazing simply sits outside what the scheme pays for. Below I explain what the Welsh Government Warm Homes Nest scheme actually is, who qualifies, why glazing is not covered, and the one Welsh route that can go towards windows. If you are comparing the picture across the UK, our double glazing grants hub covers every nation, and our costs hub shows what the work would cost you privately.
What the Welsh Government Warm Homes Nest scheme is
Welsh Government Warm Homes is the umbrella programme the Welsh Government runs to make lower-income homes cheaper to heat. Nest is its demand-led scheme, meaning you apply for it directly rather than waiting to be approached. It offers eligible households a package of energy-efficiency improvements at no cost, funded by the Welsh Government rather than by a loan or a supplier obligation.
The measures Nest can fund are the fabric and heating basics that make the biggest difference to a cold, expensive home: insulation such as loft or cavity wall insulation, and heating improvements such as a new, more efficient boiler or a heat pump. The scheme is deliberately targeted at the least efficient homes lived in by households on lower incomes, which is why it uses both an EPC threshold and a benefits or income test. What it does not include, and this is the point that trips people up, is replacement double glazing.
Who qualifies for Nest
Nest has two gates you need to pass: a test of the property itself, and a test of the household living in it. On the property side, your home must be one of the following:
- Rated EPC 54 (band E) or lower, or
- Rated EPC 68 (band D) or lower where a member of the household has an eligible health condition.
- The eligible health conditions include respiratory, circulatory and mental health conditions, dementia, and intellectual or developmental disorders.
- Owned by you, or rented privately from a landlord (not council or housing-association tenancies).
On the household side, you must also receive a means-tested benefit or be a low-income household. One important change to be aware of is that in March 2026 certain qualifying benefits moved across to Universal Credit, so if you were eligible under an older benefit name it is worth checking the current list on gov.wales before applying. To sense-check your situation against the live schemes across the whole of the UK in a couple of minutes, use our grant eligibility checker.
Why Nest does not fund double glazing
This is the most important section on the page, because the honest answer is unusual for a grant guide: the scheme you are reading about will not pay for your windows. Nest directs its budget at insulation and heating because those measures deliver the biggest reduction in heat loss and heating bills per pound spent. Loft and cavity wall insulation, in particular, tend to pay back far faster than new glazing. Windows matter for comfort, noise and condensation, but on a pure energy-cost basis they rarely give the best return, so a targeted fuel-poverty scheme leaves them out.
This is not an oddity of the Welsh scheme, it is the pattern right across the UK. In England, ECO4 can only fund glazing as one measure inside a wider package, and in most homes the assessor prioritises insulation or heating first. In Scotland, the non-repayable grant no longer covers windows at all. So Nest excluding glazing is consistent with how energy-efficiency funding works everywhere: the money chases the biggest saving, and that is almost never the windows. If you want to understand why glazing still earns its place despite that, our guide on whether double glazing is worth it sets out the comfort, noise and condensation case rather than a pure bill payback.
I get asked about "free windows on the Welsh grant" more than almost anything else, and I have to be straight with people: Nest does not do windows, full stop. It is a brilliant scheme if your home needs insulation or a better heating system, so take that if you qualify. But if your windows are single-glazed or the units have misted up, price that job separately and do not sit on your hands waiting for a grant that is never coming for glazing in Wales.
Tom Bradley, FENSA-registered installer
The nearest Welsh route towards windows
If Nest cannot help with your windows, there is one Welsh route worth knowing about, though it is borrowing rather than a grant. Welsh local authorities administer interest-free Home Improvement Loans of between £1,000 and £35,000, which can be put towards a range of works including replacement windows. Because there is no interest, the total you repay is the amount you borrow, though the council may charge an administration fee on top, and you do have to pay it back.
For most households this is a way to spread the cost of essential work rather than a source of free money, so treat it as you would any other finance: only borrow what the job genuinely needs, and get the price right first. That means comparing at least three like-for-like written quotes before you commit, whether you use a loan or pay outright.
How to apply for Nest, step by step
You apply to Nest directly, which is what "demand-led" means. The broad process runs like this:
- Check your EPC band. Nest targets homes rated EPC 54 (band E) or lower, or EPC 68 (band D) or lower where someone in the home has an eligible health condition.
- Confirm your household eligibility. Check you receive a means-tested benefit or are a low-income household, and that you own or privately rent the home.
- Contact the scheme. Apply through the Welsh Government Warm Homes Nest service on gov.wales, which arranges a free home assessment of the qualifying insulation and heating measures.
- Understand the glazing gap. Remember the assessment will not include windows, so do not expect glazing to appear in the package.
- Price windows separately. If your glazing needs replacing, get three written quotes and benchmark them independently rather than waiting on a scheme that does not fund windows.
As with any energy scheme, never pay a third party a fee simply to submit a Nest application for you. It is a free service you apply to directly, and anyone charging you for access to it is not acting in your interest.
If you do not qualify, or you just need windows
Only around 15% of households across the UK qualify for grant funding of any kind, and even those who do will not get their windows paid for through Nest. If that is you, you are in the same position as most homeowners in Wales: the sensible next step is simply to price the work fairly rather than chase funding that is not there. Start by reading whether double glazing is worth it for your home, then use our costs hub to get a realistic private price to compare quotes against. And if you want to double-check there is nothing you are missing across every UK nation, our grants hub lays out the full picture, including the schemes in England and Scotland.
Frequently asked questions
No. The Welsh Government Warm Homes Nest scheme funds insulation and heating improvements, such as loft or cavity wall insulation, a new boiler or a heat pump. It does not pay for replacement windows. Anyone who has seen a headline about free double glazing in Wales through Nest has been misinformed, because glazing sits outside what the scheme covers.
Your home must be rated EPC 54 (band E) or lower, or EPC 68 (band D) or lower where someone in the household has an eligible health condition such as a respiratory, circulatory or mental health condition, dementia, or an intellectual or developmental disorder. You must also receive a means-tested benefit or be a low-income household, and you must own the home or rent it privately.
There is no Welsh scheme that gives free double glazing to the general public. Nest funds insulation and heating rather than windows, and only around 15% of households qualify for grant funding of any kind. Most homeowners in Wales will pay for their own windows. The nearest Welsh route towards glazing is an interest-free Home Improvement Loan, which is borrowing you repay, not a grant.
You must either own your home or rent it privately from a landlord. Council tenants and housing-association tenants are not eligible for Nest, because their landlord is responsible for energy-efficiency improvements to the property. If you rent privately, it is worth speaking to your landlord before applying, as some measures need the owner's consent.
In March 2026 certain qualifying benefits moved across to Universal Credit. If you were previously eligible through one of the legacy benefits, check the current qualifying list on gov.wales before you apply, because the benefit you receive may now be assessed as Universal Credit rather than under its old name.
Not directly. The closest option in Wales is an interest-free Home Improvement Loan of between £1,000 and £35,000, administered by your local authority, which can be used towards windows among other works. It is repayable, not a grant, and the council may charge an administration fee. For most people, pricing the work privately and comparing three quotes is the more realistic route.