Windows, explained plainly.
No marketing slogans: what really separates uPVC from aluminium, what Uw means, which glass to choose and how to buy windows from Poland without middlemen. Written from practice, not from a catalogue.
The declaration of performance — the best tool for comparing window quotes
Since 2013 every window must carry the CE mark and a declaration of performance (DoP). What it contains, how to use it when comparing quotes, and what the building inspector may ask for.
Read →
Windows from Poland without middlemen: why cheaper, not worse — and what happens from dimensions to delivery
Poland is Europe's largest window producer. How that translates into price, where the savings come from when you buy without a showroom or installation, and how an order works step by step.
Read →
Toughened or laminated glass — and how to choose glazing that keeps street noise out
When regulations require toughened glass and when laminated, and what Rw (C; Ctr) on a quote really means. Why three identical panes do not insulate better than two.
Read →
Window colours: anthracite outside, white inside — how foils and RAL colours work
A uPVC window is white; the colour is a foil. That is why two-tone windows are a normal order. What about “RAL equivalents”, samples and lead times for non-standard colours.
Read →
Large glazing: fixed windows, corner glass, floor-to-ceiling units — and HST or PSK for terrace doors
What actually changes with large glazing — price, cleaning, the thermal weak point in the corner, fall-protection rules — and how lift-and-slide (HST) differs from tilt-and-slide (PSK).
Read →
Online window configurator — how to price a window in 5 minutes
The GALI window configurator step by step: material, system, dimensions, layout, opening, glazing, colour. What to prepare, common mistakes, what happens next.
Read →
How much do windows cost without installation? What drives the price
No price per m² exists. What drives the cost: material, profile depth, glazing, opening, colour, transport — and why buying without installation is cheaper.
Read →
Window glazing: double or triple, LT and g, Stopsol, Antisol and Cool-Lite
When the third pane is worth paying for, what LT and g mean on a quote, and how solar-control glasses differ: reflective Stopsol, body-tinted Antisol and selective Cool-Lite.
Read →
The Uw value — how much heat escapes through a window, and why a lower number means a lower bill
What Uw means, how it differs from the Ug of the glass, what a warm-edge spacer is worth and why a warm window does not mean a cool house in summer. Numbers from manufacturers' data.
Read →
uPVC, aluminium or timber windows? Real differences, not marketing slogans
Which window material to choose: uPVC, aluminium or timber? We compare insulation, stiffness, maintenance and price — plus chamber counts and four uPVC systems in numbers.
Read →Before you order windows.
Three things that most often decide whether buying windows goes smoothly. No filler.
How to measure a window correctly
+
Measure the opening in three places — near the top edge, at mid-height and near the bottom — because walls are rarely perfectly straight. Use the smallest result for the order. Subtract the installation clearance, usually 2–3 cm in width and the same in height; foam and anchors fill that gap. Measure height from the level the window will sit on (allow for any base or threshold), not from the raw floor. In older buildings, also measure wall thickness and check for a hidden ring beam under the sill.
Buying windows from Poland — how it works
+
Send us your dimensions or configure the windows online, and you get a quotation within 48 hours. Once you approve it, the order goes into production — typically 3 to 6 weeks depending on the system and colour. Delivery is on pallets, straight to your site, anywhere in the EU. Check the shipment while the driver is still there: number of items, dimensions, and whether the glass is intact. Any damage goes on the consignment note — that's what makes a claim quick and straightforward. The invoice and declaration of performance travel with the delivery.
Preparing for installation without mishaps
+
Order windows in advance — production usually takes several weeks, longer in season. Before delivery prepare covered storage: windows stand upright and leaning, never flat. Arrange people for unloading — a single triple-glazed sash can weigh over 100 kg. Check the openings are cleared and that the crew has all the fixing materials. On delivery, inspect glass and profiles before the driver leaves — transport damage must be reported immediately.
Question not on the list?
Write to us — we'll answer concretely, even if it doesn't end in an order.