Replacing the windows in a Listed Building is a decision that should not to be taken lightly as going about it in an unsympathetic way could not only diminish your home’s character but affect its market value.

We are turning the spotlight on windows in period properties as part of our appearance at the Listed Property Show at Olympia London on February 24 and February 25 and the Listed Property Awareness Week, which focuses on windows on February 19.

One of the most critical decisions is knowing when the time is right to replace windows. So, what are the warning signs?

1. Damage – do they stick when you try to open or close them? Do your windows fog up? Is the putty falling out or missing from your single glazed windows? Damaged or warped windows can also affect your utility bills and allow in cold, damp air and noise.

2. Rotting timber on the window and frames – there are various methods you can use to repair wooden frames if they are rotten but there does come a point of no return when it is no longer viable, and the window loses its efficiency.

3. Double glazing – is your period home suffering from unattractive double glazed PVC windows or badly designed windows that detract from the home’s charm? The wrong window can dramatically change the overall look and can even affect its market value.

4. Old glass – as the years go by the glass in your windows is unlikely to meet safety or security needs.

5. Broken sash cords.

6. Sashes unable to open at all due to being overpainted or sashes that do not slide smoothly anymore.

Scotts spokesman Richard Jarvis said: “The Scotts team regularly consults with architects and developers and has spent many years investing in product development to ensure the charm and character of traditional windows is achieved.

“The use of inappropriate windows and exterior doors is often cited by estate agents as being one of the main reasons for people being put off from buying a particular property, especially where period properties are concerned.

“It is widely accepted that PVC can have an adverse effect when it comes to valuing period properties. People are increasingly aware of the advancements that have been made during the time PVC has been around, in the way timber is treated and prepared. These strides mean that it lasts longer than ever before and presents few maintenance demands. The wide choice of timbers on the market today, allows the home owner and designer to be far more creative than they ever could with PVC.”

Established in 1920, Scotts is renowned for meeting customers’ specific requirements and can handle almost any project request for timber doors and windows from its own purpose-built factory. All windows and components are fully wrapped in protective packaging to ensure that everything arrives in perfect condition. Delivery is undertaken by Scotts own dedicated transport and scheduled deliveries can be arranged to fit in with your onsite build programmes, as necessary.

Typical Q&As

Do I need permission to replace Listed Building windows?
Yes. Any works to alter, extend or demolish a Listed Building requires Listed Building Consent from the local authority. These controls are in addition to any planning regulations which would normally apply. It is an offence to carry out work which needs Listed Building Consent without obtaining it beforehand.

Can my period window still look authentic but meet modern expectations?
Scotts of Thrapston is committed to manufacturing and supplying bespoke timber windows which combine the charm and character of traditional windows with Part L compliant levels of insulation and security.

Can I have doubled glazed sash windows?
Traditional timber sliding sashes, manufactured using modern methods, provide double glazing and draught seals thus reducing heat loss and noise, as well as offering a much smoother sliding action and modern paint systems.

How effective is secondary glazing?
Secondary glazing can affect the internal appearance of a property and create condensation and cleaning issues

Can the window design change or does it have to be the same as the original period window?
Consent for Listed Buildings is typically granted on a ‘like for like’ basis, unless the applicant can satisfy certain conditions under Listed Building consent.