North London
Secondary Glazing




NLSG are quickly becoming market leaders in suppling and fitting high quality effiant secondary double glazing in london.



With over 20 years of experience in the double glazing industry, you can expect only the best workmanship and products.



We cover the whole of the South East of England. NLSG is only a phone call away to kick dtart your project.





The benefits of high quality Seconday Glazing




Perfectly tailored fitting

Maintenance free

Greater energy efficiency

Lower energy costs

Help the Environment

Save Money, long lasting

Window Security

No Rattles, Draughts & Dust

Reduced in noise pollution

Protect home furnishings

Condensation Control

Thermal Insulation




Secondary Glazing Products


Find out more information about the different types of secondary glazing we can provide





Latest Project news


Read about the latest NLSG secondary glazing installations and industry tips



Queensgate secondary glazing

Improving security Queensgate, London


A customers in Queensgate in london contacted us requesting information on reducing the noise levels getting into their property and to improve security to their property...




Casement units with laminated acoustic glass

Blocking out the train noise


A customers in Hornchurch, Essex contacted us requesting some advice on the best way to drastically reduce the noise levels...




custom secondary glazing

Custom Secondary Glazing


An old period cottage with a custom size and shape window needed repairing and improving to reduce noise and draught...