Frequently Asked Questions
Below are a selection of questions often asked about secondary glazing.
Why not just fit new double glazed windows?
The advantages of uPVC or other new double glazing over simpler methods of window upgrading are often overestimated. Much of the comfort and energy efficiency benefits of new double glazing come from the reduction of draughts that will result from any newly fitted windows with integral draught-proofing but are less effective in reducing outside noise. If you are happy to retain your existing windows but need to improve their thermal and acoustic performance, reduce condensation and improve security then Lansec secondary glazing will provide what you require at a lower cost than replacing them.
How much will it cost?
To give an accurate quotation we need to visit your property and carry out a full site survey but you will be pleasantly surprised to find out how cost effective secondary glazing is when compared to replacing your original windows. When you consider the many benefits of secondary glazing you will appreciate that it offers excellent value for money.
How long does it take to fit?
This obviously depends on the number to be installed and the condition of the existing windows and reveals but we expect to complete most installations within 1 to 3 days. There is however no time constraint on the project and we will stay until the work is completed to our own high standards and your complete satisfaction.
Will I need to redecorate after they’ve been fitted?
Lansec secondary glazing installers make great efforts to keep upheaval to an absolute minimum so redecoration is rarely required. However, if the installation involves such things as removal/replacement of architraves or trims we are happy to include any restoration costs in the price. Our aim is that once the installation is finished you’ll hardly notice the secondary glazing is there.
Are they easy to clean?
With vertical sliding units both top and bottom panes can be tilted in by releasing small clips so the original window and the inside of the secondary unit, and the original window can be easily cleaned. All other units feature panels which simply lift out so in all instances keeping the secondary units and the original windows clean is easy.
Do I need planning consent?
The only instances that planning consent may be required is if your property is a Grade II listed building or in a conservation area. However, the fitting of secondary glazing to buildings in these categories is acceptable in the majority of cases but we always liaise with the Local Authority Conservation Officer and supply full detailed drawings and specification of the proposed installation and apply for Planning Consent on your behalf if required. Secondary glazing is not usually permitted in Grade I listed buildings and will always need full approval of English Heritage.
How long is the guarantee and what does it cover?
The Lansec guarantee covers any defects resulting from faulty manufacture or installation for a period of 5 years from the date of the completion of the project.
Is it permitted in listed buildings?
Historic England, which is the regulatory body responsible for looking after the country’s historic buildings, recommends secondary glazing in their guidance note to its 2016 publication Energy Efficiency and Historic Buildings.
“Secondary glazing when carefully designed and installed allows the original windows to be retained unaltered, and where necessary repaired, whilst reducing air leakage and conducted heat losses. As a result there is no loss of historic fabric.
Research has shown heat losses by conduction and radiation through a window as a whole can be reduced by over 60% by using secondary glazing which uses insulating frames. Besides increasing the thermal performance of windows, secondary glazing unlike double glazing can have a number of other benefits including being highly effective at reducing noise.”
We’re always happy to help, feel free to call us on 01299 544 013 or email info@lansecglz.co.uk
