We design and manufacture windows and doors that bring more light, warmth and comfort into your home. OKNOPLAST creates products that look good, perform reliably and make everyday life more comfortable.
Unmatched functionality
Get the ventilation you want with versatile tilt & turn options. Experience safe, effective, easy ventilation; no matter how big or high your windows are.
A warmer home starts with better windows
Building a home? Planning to replace your windows?
Discover what you’ll gain with OKNOPLAST windows
✓ Better thermal insulation: Uw = 0.64 W/m²K, for less heat loss and lower heating bills in winter.
✓ Brighter all year round: 22% more natural light
✓ A quieter home: sound reduction of up to 38 dB
Choose the look that suits your home
Choose windows to suit your home, with a range of shapes, sizes and over 50 colour and finish options.
SEAI Windows & Doors Grant 2026
Up to €5,600 for Irish Homeowners
Apply Through IRLPOL LTD – SEAI Registered Contractor ID: 19646. Tackle high energy costs and improve the comfort of your home with energy-efficient windows and doors, supported by grants from the Sustainable Energy Authority of Ireland (SEAI). These grants make it more affordable to upgrade your home while reducing heat loss, eliminating draughts, and improving your Building Energy Rating (BER).
3 steps to buying your windows
Free online quote
Fill in the form in 2 minutes. An adviser will contact you within 48 hours to discuss the details.
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Measurement and design
Our adviser visits your home, measures the window openings, helps you choose the right specification and provides a final quote.
Manufacturing and installation
Your windows are made to your chosen specification, and our installation team fits them at a time that suits you.
Years of experience
Million windows per year
Independent factories
Employees
Dealer networks in 21 countries
Send a request
Please submit your inquiry via the form. A response may take up to 48 hours.
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