Your Window on the World — Windows & Doors in Białystok
PVC and aluminium windows and doors — Białystok, Poland

Welcome to our window on the world!

For over 20 years, PRO-PLAST has been selling and installing windows and doors across the Podlaskie region. Experience and passion make us specialists in this field.

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Uw coefficient from
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Product warranty
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Measurement & quote
Free measure-up
To meet your expectations, we measure your windows and doors free of charge and propose the most favourable offer tailored to the client's needs.
Professional installation
Over 20 years of experience with uPVC joinery has let us build a crew that sells and installs windows in a fully professional way.
Free quote
We prepare free quotes that meet all the client's requirements — with no hidden costs or extra charges.
Delivery and instalments
You can buy windows in instalments, and we also provide free delivery.

Uw coefficient by window line

lower = warmer
PERFECTHERM0,78
redENERGY0,80
MODERNTHERM0,81
BLUENERGY~0,90
CLASICTHERM0,94
premium classstandard class
6-chamber profiles · 3-pane unit Ug = 0.5 · warm edge spacer
Heat that stays in the house
Detal pakietu trzyszybowego z ciepłą ramką ograniczającą straty ciepła

Lower heating bills — from the very first winter

Old windows leak heat where you can't see it: around the frame, by the sill, through worn seals. Our profiles hold the warmth inside, so your heating isn't running flat out. Fewer draughts, less condensation on the glass, a smaller bill at the end of the month.

See our offer
Old vs new

See the difference through the glass

Drag the slider: on the left a tired, milky old pane; on the right a sharp, warm image through a modern triple-glazed unit.

New triple-glazed unit
Old pane
Old pane New triple-glazed unit
How we work

Four steps to new windows

1

Contact

Call us or leave your number — we'll ring back and find a time that suits you.

2

Measure-up

We come to you, take exact measurements and suggest the best solution.

3

Quote

You get a clear price in writing. No hidden costs, no pressure.

4

Installation

Our crew fits the windows fast and clean. We tidy up after ourselves and show you how to use them.

Pro-Plast

You know a good window when you stop thinking about it.

0,00
Uw od (W/m²K)
0
Product warranty
0
6-chamber profiles
0
Measurement & quote
Instalments

Pay in instalments — start right away

Good windows are an investment, but you don't have to pay it all at once. We'll spread the cost over comfortable instalments, and you start saving on heating before it's even paid off. We'll help with the paperwork from start to finish.

Ask about instalments
Dom o zmierzchu z ciepło świecącymi oknami Pro-Plast
Pro-Plast

Ready for a warmer, quieter home?

Book a free measure-up — we'll take care of the rest. No deposit for a chat, no hard sell.

Call us Free measurement