Spec-led window quotes

Professional-grade window specs & quotes

Know exactly what you are buying — glass make-up, frame chambers, U-values and security ratings — then compare quotes like a pro. Free and no-obligation, subject to eligibility and a home survey.

Understand every line on a technical window quote
Matched with vetted, accredited local installers
Compare specifications fairly, on the numbers that matter

A modern rendered UK house fitted with slim-frame double glazed windows

Quote request

Secure

Step 1 of 2

Do you own your home?

Yes No

No problem — you can still request quotes, but an installer will need the homeowner’s go‑ahead before any work is agreed.

Please pick the closest answer to continue.

This service is for UK homeowners planning to replace or upgrade their windows.

Where should we send your quotes?

Postcode

First name

Last name

Email address

Phone number

Your details are sent securely and only used for your quotes.

By submitting this form you agree that we may contact you in accordance with our privacy policy.

How it works

Three steps to spec-led quotes

Specification-minded homeowners compare quotes this way — enter your details once, get matched with vetted local installers, and review free no-obligation quotes you can actually read.

Tell us the basics

Confirm you own the home and share your postcode and contact details. It takes under a minute and there is no obligation.

Get matched locally

We match your enquiry with vetted, accredited installers covering your area, so quotes come from firms who work to recognised standards.

Compare like a pro

Use our spec guides to read each quote on the numbers that matter — glass make-up, frame profile, U-value and security rating — before you decide.

Standards to look for FENSA CERTASS TrustMark PAS 24 Insurance-backed guarantee Deposit protection

Accreditations and guarantees vary by installer and are confirmed at survey. Prefer to read customer feedback first? You can see verified installer reviews on our sister site before you enquire.

The spec sheet

The four numbers that decide a window

Most quotes lead on price and colour. A pro reads the specification first — because that is what determines warmth, quiet, security and how long the window lasts.

Glass: Low-E coatings and gas fills. A soft-coat low-emissivity pane with an argon-filled cavity reflects heat back indoors — the single biggest lever on a unit’s thermal performance.
Frame: Chambers and profile depth. More internal chambers in a uPVC profile trap more still air, improving insulation and rigidity. Depth and reinforcement matter for larger openings.
U-value: Whole-window heat loss. Lower is better. The whole-window U-value (not just the glass centre-pane figure) is the number to compare like-for-like across quotes.
Security: PAS 24 and locking. PAS 24 is the enhanced-security benchmark for new windows and doors, backed by multi-point locking and laminated glass on vulnerable openings.

Read the full specifications guide →

What pros check

Before you sign, run these checks

A homeowner reviewing a printed window quote at a kitchen table

Like-for-like specs

Compare the same glass, frame and U-value across every quote — not a budget unit against a premium one.

Full itemisation

A clear quote lists units, sizes, glazing spec, hardware and fitting — so you know precisely what is included.

Accreditation & guarantee

Check the installer’s FENSA or CERTASS registration and ask about an insurance-backed guarantee.

Survey before deposit

Any firm should measure and survey before a fixed price. Funding options are subject to eligibility and that survey.

Spec guides

Learn the detail before you buy

Plain-English guides to the specifications that appear on every window quote. Start with the overview, then dig into the numbers.

Start here

Window specifications explained

The full glossary — what every spec on a quote means and why it matters.

Read guide → Energy

Window energy ratings A to G

How the WER label works and what a good rating actually tells you.

Read guide → Thermal

Understanding U-values

The single most useful thermal number — and how to compare it fairly.

Read guide → Glazing

Double vs triple glazing specs

Where a third pane earns its place — and where it does not.

Read guide → Security

Window security standards (PAS 24)

The enhanced-security benchmark and the locking that backs it.

Read guide → Glass

Glass coatings & gas fills

Low-E coatings, argon and krypton — how sealed units keep heat in.

Read guide → Frames

Frame profiles & chambers

Why chamber count and profile depth change insulation and strength.

Read guide → Acoustic

Acoustic glazing for noise

Laminated panes and asymmetric units for quieter rooms.

Read guide → Quotes

Reading a technical window quote

Decode every line, from unit sizes to glazing codes and hardware.

Read guide → Compare

Comparing window specs fairly

Line quotes up like-for-like so the cheapest is not the weakest.

Read guide →

Ready when you are

Get pro-level window quotes

Enter your details once and we’ll match you with vetted local installers for free, no-obligation quotes — subject to eligibility and a home survey. Surveyors in many areas have appointments this month.

Generate my quotes →