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How do double glazed windows work?

Double Glazing is where two panes of glass are fitted together with a spacebar in between to form a sealed frame. Argon gas is inserted between the two panes (Argon gas is much denser then air). This stops the warm air inside your home from escaping and shuts out the cold air from entering.

Windows By Wise can offer a wide range of `A+` and `A` rated windows to suit your needs. Please get in touch for more details and a FREE quote.


What are the benefits of triple glazing?

Triple glazing is simply an extra pane of glass (3) It is not just the extra pane that improves your energy efficiency, it is also the added layer of argon gas. Triple glazing can improve the function of your windows in 4 ways;

  • Warmer
  • Quieter
  • Tougher
  • Safer


Are my windows made to measure?

Yes, all our windows, doors and conservatories are made to measure, with the exact design and furniture options that you choose. Our team can help you choose the best windows for your home, please don't hesitate to ask.


How quickly can you install my windows?

After the contract has been signed we aim to get the surveyor out to you within 2 working days. We will then book a fitting date within 3 to 4 weeks, if you are looking for your windows to be installed on a certain date or quicker please ask and we will do our very best.


Do I need to pay a deposit?

No, we do not take deposits. Payment is only made once installation has been completed.


What guarantees do you provide?

Windows By Wise offers a 10 year guarantee which is backed by Fensa. The guarantee protects you as a customer against any faulty material with a replacement free of charge.

We also provide you with a SAC Security guarantee. If any our windows that we supply and fit which have SAC Shoot bolt locks are broken into by forced entry, we will pay up to a maximum of £1000 towards your excess.


Are Windows By Wise registered to any governing body?

We are registered with Fensa and Trust Mark.

Fensa was set up by the Glass and Glazing Federation (GGF) and other industry bodies in response to building regulations for double glazing companies in England and Wales. When replacing windows, doors and roof lights in dwellings in England and Wales, home owners must comply with current thermal performance and building regulation standards and ensure they get a certificate from a competent person scheme such as Fensa. Fensa enables the companies that install replacement windows and doors to self-certify compliance under these building regulations without the need for a separate assessment from building control.

Trust Mark is the only Government endorsed scheme for trades in and around the home. Trust Mark award registered firms with their accreditation after thorough vetting and on-onsite inspections to ensure the firm is raising industry standards.


How does self-cleaning glass work?

Self-cleaning glass is a two-stage process which uses a microscopic coating with a unique dual-action.

The first stage of the cleaning process is "photocatalytic". In this stage the coating reacts with daylight to break down organic dirt. The second stage is "hydrophilic". Here, instead of forming droplets, rainwater hits the glass and spreads evenly, running off in a "sheet" and taking the loosened dirt with it, also drying quickly without leaving streaks.


Do I need planning permission?

This guidance reflects increases to the size limits for single-storey rear extensions which apply between 30 May 2013 and 30 May 2019, and the associated neighbour consultation scheme.

Adding a conservatory to your house is considered to be permitted development, not needing an application for planning permission, subject to the limits and conditions listed below.

  • No more than half the area of land around the "original house"* would be covered by additions or other buildings.
  • No extension forward of the principal elevation or side elevation fronting a highway.
  • No extension to be higher than the highest part of the roof.
  • Single-storey rear extension must not extend beyond the rear wall of the original house* by more than three metres if an attached house or by four metres if a detached houseIn addition, outside Article 1(5) designated land* and Sites of Special Scientific Interest the limit is increased to 6m if an attached house and 8m if a detached house until 30 May 2019.These increased limits (between 3m and 6m and between 4m and 8m respectively) are subject to the neighbour consultation scheme.
  • Maximum height of a single-storey rear extension of four metres.
  • Extensions of more than one storey must not extend beyond the rear wall of the original house* by more than three metres or be within seven metres of any boundary opposite the rear wall of the house.
  • Maximum eaves height of an extension within two metres of the boundary of three metres.
  • Maximum eaves and ridge height of extension no higher than existing house.
  • Side extensions to be single storey with maximum height of four metres and width no more than half that of the original house.
  • Roof pitch of extensions higher than one storey to match existing house.
  • No verandas, balconies or raised platforms.
  • On designated land* no permitted development for rear extensions of more than one storey; no cladding of the exterior; no side extensions.

* The term "original house" means the house as it was first built or as it stood on 1 July 1948 (if it was built before that date). Although you may not have built an extension to the house, a previous owner may have done so.   

* Designated land includes national parks and the Broads, Areas of Outstanding Natural Beauty, conservation areas and World Heritage Sites.


Please note: The permitted development allowances described here apply to houses and not to:

  • Flats and maisonettes (view our guidance on flats and maisonettes)
  • Converted houses or houses created through the permitted development rights to change use (as detailed in our change of use section)
  • Other buildings
  • Areas where there may be a planning condition, Article 4 Direction or other restriction that limits permitted development rights.

Where work is proposed to a listed building, listed building consent may be required.

Please be aware that if your development is over 100 square metres, it may be liable for a charge under the Community Infrastructure Levy.