See what energy-efficient windows could take off your heating bills.
Compare glazing, U‑values and typical savings, then get matched to vetted local
installers for a free, no‑obligation quote.
£75–235
typical yearly bill saving, single glazing to A‑rated double (semi to detached, gas)
405 kg
up to this much less CO₂ a year from the same upgrade
4.9/5
our installation partner’s Trustpilot score, from 12,000+ reviews
Typical figures from the Energy Saving Trust, framed as ranges —
your own results depend on your home, its current glazing and how you heat it.
No obligation, and no cold-calling out of the blue — we only
call about the estimate you ask for.
See what your windows could save
Two quick questions and your postcode. About 60 seconds.
Typical energy and saving figures on this page are drawn from the
Energy Saving Trust and shown as typical ranges — not guarantees.
No-obligation quotes
Free home assessment
FENSA-registered installers
Rated 4.9/5 on Trustpilot
Where your home loses heat
Heat leaves an older home from every surface, but the windows — and the draughts
around them — are among the quickest wins. Efficient glazing and a well-sealed frame
keep more warmth in the room, so your heating works less hard.
~35%WallsThe biggest single loss in most homes, and the slowest to tackle.
~25%Roof & loftCheaper to insulate, but nothing to do with your windows.
~15%Draughts & gapsOften worst around old frames — you feel it as a cold edge by the glass.
~10–15%Windows & glazingSingle glazing and tired seals let warmth straight out.
Proportions are broad, typical estimates and vary with a property’s
age and construction.
Double or triple glazing?
Lower U‑values mean less heat escaping through the glass. For most UK homes,
good A‑rated double glazing does the heavy lifting; triple glazing earns its keep
in new-builds, exposed spots and rooms where noise is the real problem.
Typical whole-window U‑values (W/m²K) — lower is warmer.
Three simple steps, no pressure to proceed at any point.
Tell us about your home
Answer two quick questions and pop in your postcode — about 60 seconds, no account needed.
Get matched to a local installer
We pass your enquiry to a vetted, FENSA-registered installer covering your area for a free, no-obligation home assessment.
See your estimate and decide
Get a written estimate with funding and contribution options, subject to eligibility and a home survey. It’s entirely your call.
What customers say about our installation partner, Help 2 Buy Windows
We match your enquiry to trusted installers. Our installation partner,
Help 2 Buy Windows,
is rated 4.9/5 “Excellent” on Trustpilot from 12,000+ reviews —
the UK’s No.1 double glazing installer.
“The back of the house was always freezing. Since the new windows went in it
holds its warmth far better and the rooms feel calmer and quieter. The fitters were tidy
and finished exactly when they said they would.”
BBarbaraSheffield · March
Verified install — Help 2 Buy Windows★★★★★
“We’re on a busy road and the traffic noise used to carry straight through.
It’s noticeably quieter now, and the draught by the bay window has gone completely.
Straightforward from survey to fitting.”
NNigelIpswich · May
Verified install — Help 2 Buy Windows★★★★★
“Honestly the biggest difference is comfort — no more cold spots by the
glass in the evenings. The team explained the options clearly and left everything
spotless. Really pleased with the whole job.”
AAishaBradford · February
Verified install — Help 2 Buy Windows
Savings guides
Plain-English reads on how efficient windows work and where the money actually goes.
