Guides: measuring, ordering & aftercare
Plain-English guides for every stage (before you buy, measuring and ordering, delivery day, and installation and aftercare information for you or your fitter), with step-by-step diagrams.
New here? Start with this one
How to use this website
Design a made-to-measure window, set your exact sizes, pick colours and glass, and get an instant price: the whole journey in four minutes.
Before you buy
What supply-only means, what drives the price, and the rules your windows have to meet.
Supply-only explained
Exactly what arrives on the lorry, what you arrange yourself, and where responsibility sits on a supply-only order.
6 min read
uPVC window prices by size
The five things that drive a window's price, with live from-prices straight from our factory pricing engine.
6 min read
Supply-only window prices: real examples
One window, five windows and a whole 3-bed house, each price live from our designer, plus delivery.
4 min read
Buy direct from the manufacturer
How buying direct differs from an installer or reseller, how your windows are made, and how ordering works.
4 min read
Our windows vs a national installer
Published fitted prices from national installers and cost guides, next to our prices plus your own fitter.
4 min read
uPVC and composite door prices
Live prices for our uPVC and composite doors, white and coloured, plus what each extra adds.
5 min read
Building Regulations: Part L, F & K
The three documents that govern replacement windows (heat, ventilation and safety glazing) as buying decisions.
8 min read
Fitting your own windows? FENSA & building control
The two routes to getting supply-only windows signed off, and the paperwork your buyer's solicitor will ask for.
6 min read
Measuring & ordering
Get the sizes right, then design, price and order online.
How buying works, step by step
Every step from measuring to aftercare: paying, the order check, lead times, delivery day, the 72-hour check and guarantees.
How to measure windows
Measure the opening brick-to-brick, deduct 10mm and pick the right cill. Five minutes with a tape measure.
5 min read
How to measure a bay window
One overall height, the internal width of each face and the angle at each corner, then check the backspan in the bay designer.
8 min read
How to measure for bifold doors
Brick to brick, deduct 10mm, then choose the leaves, which way they fold, in or out, the threshold and the cill.
8 min read
How to use this website
Set your exact sizes, move mullions and transoms, pick colours and glass, and get an instant price.
4 min read
Delivery day
What turns up, what to check before the driver leaves, and how delivery works.
Installation information for you or your fitter
What to ask a fitter, then step-by-step installation information to share with your installer, or to follow yourself if you're a competent DIYer. We supply only. We don't offer fitting.
Hiring a fitter for supply-only windows
What to ask a fitter before you order, what to send them, when to book the fit, and who signs the work off.
5 min read
Installing a uPVC window: for you or your fitter
From removing the old frame to the final bead of silicone: level, pack, fix and seal a replacement uPVC window.
15 min read
Installing a door: for you or your fitter
Fit a uPVC or composite door set: a solid level threshold, packed hinge points and a slab that closes sweetly.
15 min read
Installing bifold doors: for you or your fitter
Level the cill, then fit, square and fix an aluminium bifold set that arrives made up with its leaves already hung.
15 min read
How to toe & heel a window or door
The packing technique that keeps sashes and doors square: fix a dropped door or re-square a window after glazing.
10 min read
Options explained
What each choice in the designer means, and when you need it.