Grantham's experts in doors

Quality that stands the test of time
The entrance door gives the first impression of a home. That is why we offer you the choice you need to find a door you are proud to come home to, and all our doors meet insurance requirements.
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Working within your budget and delivering on time, we pride ourselves on our quality and service. Phone us in Grantham today for a free quote.
A house extension with windows and doors in Grantham

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 specialties include:
  • Windows & skylights
  • Front and back doors
  • Upvc doors
  • Aluminium doors
  • Bi-folding doors
  • Composite doors
  • High security doors
A woman looking at quality windows and doors in Grantham

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 cut to your requirements.
All new products are manufactured using the safest methods possible while old glass is disposed of using Eco-friendly methods.
Doors in Grantham

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. 
When our Bi-Folding doors are closed there are no externally accessible parts and screw fixings are concealed. The mechanism on the doors also incorporates locking screw technology so that the hardware cannot be removed from the track when the the doors are closed.
To get the advantages of greater light, energy efficiency, and alfresco living space from secure and beautiful doors, contact us in Grantham.

For a free quote call: 01476 579058

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