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North London Secondary Glazing
Specialists in Insulation & Soundproofing for Windows & Doors

All About North London Secondary Glazing

We are a specialist supplier of Secondary Double Glazing and Acoustic Glazing Treatments for Soundproofing Windows, with over 40 years of experience in all types of Window Insulation, serving North London and surrounding areas.

Our aim is to make dealing with us a stress-free experience, from start to finish - from the first contact through to a completed installation - and beyond into the Guarantee and Service Period, should you choose to do business with us.

Quality and Service are the keywords of our Company and we are dedicated to providing:

The following information and the rest of the website should provide you with everything you need to know including answers to the most common questions that we get asked.

However, if you would prefer to call us - please do so - we can promise you a quick, courteous, professional response, from someone who knows what they are talking about!


Using our Online Quotation Service-for same day quotation 7 days a week our quick and easy to use form is here

You can also visit our areas covered page, to find out where we provide our service VISIT

Secondary Glazing, Secondary Double Glazing

Variously called Secondary Glazing, Secondary Double Glazing, Secondary Windows, Storm Windows and Internal Double Glazing - these are all just different descriptions for one and the same thing!

Secondary glazing is a slim, completely separate internal window or door, fitted to the inside of the existing window or door.

Our Secondary Glazing system is very discreet - made and fitted to blend in to the existing windows and doors, it is:

Secondary Glazing for Window Insulation, London Secondary Glazing
  • Manufactured from slim extruded aluminium frames
  • As standard has a durable white gloss finish & other colours are available
  • Glazed with various types of 4, 6 or 6.4mm glass
  • Robust & functional, as well as complementary & unobtrusive once installed
  • Available in different unit types to match different types of existing windows and doors
  • Designed to allow easy access to the existing primary windows for ventilation & cleaning
  • Suitable for installation to almost all types of existing windows & doors
  • Mainly specified for Heat Insulation, Soundproofing - or a combination of the two

Once fitted, Internal Double Glazing has been created - it is a misconception that Secondary Glazing is itself Double Glazed.

Our Services

Acoustic Glass, Glazing, Units, Double & Secondary Glazing for Noise Reduction & Soundproof Windows

18 Acoustic Glazing can Reduce Noise from Outside by up to 85%, London Secondary Glazing

We provide a complete range of services for the noise reduction and soundproofing of windows:

Please contact us:

Call or Click to Call: 0203 6247795   or 07440256503 8.00am to 5.00pm Monday to Friday

Email sales@northlondonglazing.com - we will reply same day including Weekends

Using our Online Quotation Service - for same day quotations

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Call or Click to Call: 0203 624 7795 or 0744 025 6503 Visit our Contact Page for Opening Hours , Address & Email

Name & Registered Address: 36 Byron Road, Harrow, Middlesex, HA3 7ST. Registered in England and Wales - Registered Company No. 13360440 :
Registered Office: 30 Milton Road, Westcliff-On-Sea, England SSO 7JX VAT Registration No. 389 2452 57

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