Warm Core Features

Our innovative Aluminium Warm Core doors consist of high performance, insulating aluminium frames with the choice of double or triple glazing, providing great thermal efficiency, security and style.


The key element of these frames is an efficient, multi-chambered, insulating thermal core as opposed to the more common polyamide thermal breaks found in many existing doors and windows. Constructed to provide an optimised 70mm front to back sash depth with double-strength sash corners and internal aluminium cleats, the frames are extremely robust.


Constructed using stylish, yet hardwearing, brushed aluminium housing a thermal core and 28mm double glazing, the doors have an impressive U-value of 1.5 W/m2K, compared to 1.8 W/m2K required by current industry standards for replacement doors. By upgrading to 44mm triple glazing the U-value can be improved to 1.0 W/m2K, further increasing the thermal efficiency of your property, which in turn can mean lower bills.

"Warm Core frames hold PAS 24 (certified by British Standards) and Secure By Design standards (police-backed industry standard) endorsing their high security performance..."


Independently tested by UKAS, Warm Core doors have proven structural strength to protect against forced entry. Custom-engineered, high security, extruded aluminium hinges, integral dog-bolt, multi-screw fixings and specifically designed hardware are other key features that contribute to the security rating, offering you great peace of mind. In fact, our Warm Core doors are backed by an ERA (home security) guarantee against forced entry within 10 years.


When looking to install new doors for your home, choose our Warm Core doors for added thermal efficiency and high performing security features with a peace of mind guarantee.


Warm Core frames

security performance

Warm Core frames hold PAS 24 (certified by British Standards) and Secure By Design standards (police-backed industry standard) endorsing their high security performance. 


RECENT projects

Recent Horsford Projects Recent Horsford Projects

A picture tells a thousand words. Take a look at some recent customer projects.


We'll be happy to drop by and give you some advice about your home improvements. Just phone us at:

Tel: +44 01603 666414+44 01603 666414

FREEPHONE: 0800 0155551

E: sales@horsfordwindows.com

How to visit us

Horsford Window & Conservatory Company Limited



16 Marriott Close, Off Heigham Street, City Trading Estate, Norwich, Norfolk, NR2 4UX


Telephone: 01603 666414 
FREEPHONE: (0800 0155551)
Facsimile: 01603 762013

E: sales@horsfordwindows.com

Web: www.horsfordwindows.com



41a, Prince of Wales Road, Cromer, Norfolk, NR27 9HS 


Telephone: 01263 514594 

FREEPHONE: (0800 0155551)
Facsimile: 01263 514594

E: cromer@horsfordwindows.com

Web: www.horsfordwindows.com

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Company Information: This site is owned and operated by Horsford Window and Conservatory Company Limited, a company registered in Wales whose registered office is at: 16 Marriott Close, Off Heigham Street, City Trading Estate, Norwich, Norfolk NR2 4UX, United Kingdom. If you have any queries please contact our Customer Services at: headoffice@horsfordwindows.com or telephone: 01603 666414 (freephone: 0800 0155551) Company Registration No. 04578981, VAT No. 595 4050 26 © 2016, Horsford Window and Conservatory Company Limited.