Caring for Traditional Sash and Case Windows in Highland and Moray Homes
Period sash and case windows are a beautiful feature of older properties across the region, but they need a gentler approach than modern glazing. Here is how to keep them clean and in good order for generations.
Drive through almost any town or village in the Highlands and Moray and you will see them everywhere. Elegant sash and case windows in Victorian terraces in Inverness, sturdy timber frames in the stone cottages of Speyside, and tall, graceful panes in the townhouses of Elgin and Forres. These traditional windows are one of the defining features of Scottish architecture, and they are also one of the most misunderstood when it comes to cleaning and care.
What Makes Sash and Case Windows Different
A sash and case window is made up of one or two sliding panels, known as sashes, that move up and down within an outer timber frame, or case. Traditionally the sashes are counterbalanced by weights hidden inside the case, connected by cords running over small pulleys. Many original examples still have single glazing, fine glazing bars and putty holding the panes in place. Every part of that construction is more delicate than a modern sealed unit, and treating it like modern UPVC is how damage happens.
Why They Need a Gentler Approach
Modern double glazing is robust. You can clean it briskly with plenty of water and it shrugs it off. Traditional windows are different for several reasons:
- Timber frames can absorb water and, over time, soften, swell or rot if they are repeatedly soaked.
- Old putty becomes brittle with age and can crack or fall out if it is knocked or scrubbed hard.
- Original glass is often thinner and occasionally has slight ripples or imperfections that are part of its charm and history.
- Paintwork on heritage windows is what protects the timber underneath, so harsh cleaning that strips paint shortens the life of the whole window.
The Most Common Mistakes
We see the same avoidable problems again and again on period properties across the region:
- Pressure washing. A jet wash forces water deep into joints, behind putty and under paint, causing rot and lifting finishes. It should never be used on traditional windows.
- Harsh chemicals. Strong cleaners and bleach strip protective paint and can react with old glass and metal fittings.
- Abrasive pads and scrapers. These scratch original glass and gouge soft timber.
- Ignoring the frame. Focusing only on the glass and leaving dirt and moss to build up in the timber joints is where long term decay begins.
The Right Way to Clean Traditional Windows
The aim is to clean thoroughly while being kind to every part of the window. The professional approach uses:
- Soft brushes and pure water that lift dirt without scrubbing and rinse clear without leaving residue on the glass or timber.
- Controlled water volumes rather than soaking, so moisture does not work its way into the timber and putty.
- Careful attention to drainage channels and the bottom rail, where water and debris naturally collect.
- A gentle touch around glazing bars and putty lines to avoid disturbing anything fragile.
Pure water is particularly well suited to heritage glass because it dries without streaks and without leaving the mineral deposits that, over decades, can dull old panes.
Looking After the Whole Window, Not Just the Glass
Cleaning is the perfect moment to keep an eye on the overall health of a traditional window. While the glass is being cleaned, it is worth noting:
- Any flaking or blistering paint that is leaving timber exposed
- Cracked or missing putty around the panes
- Soft or discoloured timber, particularly on the bottom rail and sill
- Sashes that have become stiff or will not stay open, often a sign of cord or weight issues
- Gaps where draughts and water can get in
Catching these early means a small repair rather than a major restoration later. A well maintained sash and case window can last well over a century, which is exactly why so many original examples are still in use across the Highlands and Moray today.
Condensation and Single Glazing
Many traditional windows are still single glazed, which means condensation in the cooler months is more likely than on modern units. Keeping the glass and timber clean, ensuring the drainage channels are clear, and wiping away standing moisture all help protect the timber from the constant damp that single glazing can bring. It is one more reason that regular, gentle cleaning is not just cosmetic but genuinely protective for these windows.
Respecting the Character of Older Homes
Period windows are part of what gives Highland and Moray properties their character, and in conservation areas or listed buildings there may even be rules about how they can be maintained or altered. Keeping the original windows clean and in good repair is almost always preferable to replacement, both for the look of the property and its value. A careful clean is the simplest way to keep them looking their best while protecting the timber and glass for the future.
How We Can Help
We clean traditional and period windows on properties throughout Inverness, Elgin, Forres, Nairn, Dingwall and the surrounding region, always with the gentler approach that older glazing deserves. We are happy to flag anything we notice during a clean so you can keep your windows in good order year after year.
Have period windows that need careful attention? Get in touch with Kleana Window for a clean that respects the age and character of your home.