- Autumn Park Industrial Estate, Grantham, NG31 7EJ
- 01476 579058
- Opening Hours: 7:30 am - 4:30pm | Mon - Fri
Avanti Windows is a local, straightforward installer serving Grantham and the surrounding villages and towns since 1988.
We’ve built our reputation on three simple things: good advice, quality products, and careful workmanship. Every job starts with a proper survey, not a sales pitch. You’ll receive a clear, itemised quote and realistic lead times.
On installation day, our fitters protect floors and furnishings, work cleanly, and take away all old frames and glass. If you ever need us after the job, you’ll speak to the same friendly team who fitted your home — not a call centre.
Lower energy bills: A-rated performance with the right glazing for your home.
Built for security: Quality frames, hardware and locking systems as standard.
Tidy, fuss-free installs: Polite fitters, dust protection, and everything cleaned before we leave.
Avanti Windows is a local, straightforward installer serving Grantham and the surrounding villages and towns since 1988.
We’ve built our reputation on three simple things: good advice, quality products, and careful workmanship. Every job starts with a proper survey, not a sales pitch. You’ll receive a clear, itemised quote and realistic lead times.
On installation day, our fitters protect floors and furnishings, work cleanly, and take away all old frames and glass. If you ever need us after the job, you’ll speak to the same friendly team who fitted your home — not a call centre.
