Installation & Replacement

Our Grantham windows and doors specialists will come to your home or office when you need us. Our experts at Avanti Windows provide services that you can count on to last. We can remove, replace and install new glass and doors on-site. Our specialities include:

• Windows & skylights
• Front and back doors
• Upvc doors
• Aluminium doors
• Bi-folding doors
• Composite doors
• High-security doors

Attractive & Reliable Solutions

Quality is paramount at Avanti Windows. Our composite doors are harshly tested against extreme weather and attack. UPVC doors have fully heat-welded mitred corners. The sliding system of our patio doors creates effortless opening and closing, while our French doors offer multipoint locking. Featuring a unique double weather seal, our stable doors perform just as well as a single one. We also offer custom designs, which can be made to your requirements.

All new products are manufactured using the safest methods possible while old glass is disposed of using Eco-friendly methods.

Beautiful Bi-Folding Doors

Bi-Folding doors can be installed even where it seems impossible. Even if you don’t have a fully available opening, we can create one. 

To get the advantages of greater light, energy efficiency, and alfresco living space from secure and beautiful doors, contact us in Grantham.