Timber sash and case windows can really transform any home. But over time, these wonderful windows will need a little extra care and attention!
Sash cords break, the draught seal wears away, and the bottom rails start to rot through years of neglect. The window shakes, then jams, then eventually fails to close properly.
Woodfellas have been relied on timber sash and case window specialists serving Scottish homes throughout Renfrew from our workshop premises for over two decades!
We restore , and even craft fully bespoke replacements when a window is too far gone!
Contact to us on 07920 057592 or via our contact page to arrange a complimentary visit and written quote.
What is a timber sash and case window
The term shows the purpose.
The sash refers to the gliding panel of glass itself, while the case is the empty box frame that is fitted into the wall surrounding the window opening.
Nestled within each case sit two weights, one serving the upper sash and one serving the lower, suspended on sash cords that run over pulley wheels positioned at the top of the frame.
The lower sash moves up as the weights fall gracefully on the other side, and once released, they keep the sash perfectly in place.
Sash and case windows slide vertically, whereas casement windows swing outward on hinges.
With both sashes working separately of one another, you have the freedom to open from the top, the bottom, or even both simultaneously. This gives your home excellent ventilation control, all without any panel moving inward into the room or outside toward the street.
When the mechanism is functioning as intended, you barely notice it whatsoever.
When the cords snap, as they so often do after years of faithful service, the sash drops and remains persistently in place or becomes increasingly difficult to operate.
That’s precisely where Woodfellas come into their own!

Timber sash window services and refurbishment
Each traditional sash window demands its own solution.
Our Renfrew sash windows team carefully evaluates what your windows need in order to determine whether repair or full refurbishment is the most appropriate option for you.
Window draught-proofing
When a window remains structurally intact yet does not perform on performance, a complete refurbishment becomes the most sensible and most worthwhile course of action.
Our professional craftsmen apply traditional joinery techniques to enhance your glazing and fit draught-proofing throughout.
A carefully restored sash and case window in your Renfrew home ought to seem as though it could never have been anything other than perfectly as it is.
Effortless to operate, silent within the frame, and inviting in the space. That is the standard we aim towards on every instance.
Sash cord and weight replacement
The replacing of sash cords is the most frequently performed repair in our work.
When the cords snap, the weights hang unhelpfully inside the case with nothing at all linking them to the sash.
We access the pocket piece, take out the existing weights, install fresh sash cords, and set the pulleys precisely.
Our team will consistently check the full condition of the window while on site, ensuring nothing goes unnoticed.
Timber repairs
Lower rail sections and sills bear the impact of Renfrew’s severe climate.
Where the rot is restricted to part of the rail, we remove the affected timber and insert new sections using matching traditional wood. The repair blends perfectly with the surrounding timber and the remainder of the original window remains completely intact.
We strongly believe to the belief that there is simply no reason to sacrifice a window that is still structurally sound simply because one portion of it has developed an issue.
Supplying and fitting bespoke sash windows
When a window is beyond economical repair, we make new sash windows to your precise specifications within our workshop and supply and install them at your property.
Every replacement window is expertly crafted and made to measure in either hardwood or treated pine, with meticulous care taken to closely match the profile, proportions and glazing bar pattern of the original window.
As wooden window manufacturers proudly based in Renfrew, we provide and fit brand new sash and case windows across the region, combining quality materials with traditional traditional techniques!
Our range of sash and case windows covers everything from a single replacement sash through to a complete suite of new windows for a listed building.
Double glazing and enhanced security hardware are provided as standard features.
Double glazed sash windows in Renfrew
Transform your property and elevate your day-to-day living experience with the classic elegance of double glazed sash and case windows.
Our sealed units are slimline sealed units that sit within the original glazing rebate without altering the sash profile or glazing bar pattern.
From the outside, the timber window looks identical to the original.
Find out why homeowners throughout Renfrew are choosing double glazing upgrades for their traditional sash and case windows!

Energy efficiency
Our glazing service provides a significant improvement to your home’s efficiency.
This directly results in lower energy bills, as your heating system needs to work far less to keep a comfortable temperature throughout your home.
Noise reduction
Reduced sound is an additional advantage that homeowners often notice almost immediately.
If your property sits on a busy road or close to a major junction, double glazed sash windows will reduce noise transmission substantially.
Sash and case windows in Scotland’s conservation areas and listed buildings
Scotland’s architecture is both breathtaking and historically significant.
Timber sash and case windows are a defining feature of conservation area heritage, and maintaining them matters enormously! Why not protect the soul of your building with expert timber window restoration from Woodfellas?
If your property falls within one of these designated areas, or if it has listed building status, the regulations governing window replacement are specific and must be understood before any work is commissioned.
Our experience with properties within conservation areas spans more than twenty years.
Having developed a strong understanding of council expectations, we are well positioned to support you with the consent process and carry out window restoration or replacement work that fulfils all requirements efficiently and without avoidable delays.
Reach out now for a complimentary site visit and written quotation from a team whose experience in listed buildings and conservation area projects is only matched by their profound knowledge of the windows themselves.
Sash and case window faults we fix in Renfrew
The sash is falling down and not remaining in the open position.
Changing faulty sash cords is the repair our professional team performs most often on sash and case windows, and provided the window is otherwise in good condition, it is a quite straightforward task for our skilled professionals.
Draughts and rattling
The seal between the sash and the frame has either deteriorated beyond use or was just never installed in the first place. That same persistent gap responsible for the draughts is equally to blame when the window begins to rattle restlessly against the wind.
Incorporating draught-proofing during a scheduled service appointment addresses every one of the concerns thoroughly and simultaneously.
Rotten bottom rail
The lower rail of the lower sash is the most exposed part of a sash and case window!
Where the decay is limited to a particular section of the rail, we carefully remove the compromised timber and splice fresh, perfectly matched material seamlessly into its place.
The remainder of the original window remains completely untouched.
Window stuck shut by paint
Years of coatings applied to the sash to protect it from Scotland’s damp climate can make it become bonded to the frame.
We free the sash from its binding, thoroughly clean every surface, refine the fit required, and return the mechanism to smooth, proper working order once again.
The cords and pulleys are thoroughly inspected during the process, saving you from several repair jobs down the line.
Single glazing
Original single-glazed panes lose their warmth with surprising ease and offer little resistance to the clamour of the street outside. We replace them with double glazing whilst preserving every detail of the window’s outward appearance entirely intact.
Sash and case windows Renfrew FAQs
Is it better to refurbish sash and case windows or replace them?
So what’s the right answer? It really comes down to the condition of the window itself! If the box frame is solid and the sashes are structurally sound, refurbishment is certainly worth considering. You get excellent performance without sacrificing any of the original character. But if the frame has seriously deteriorated or the timber has rotted beyond saving, replacement is honestly the more sensible and practical option.
Can sash and case windows take double glazing?
Yes. We use slim profile sealed units that fit neatly within the existing glazing rebate, requiring no alteration to the sash width or glazing bar arrangement. Viewed from the exterior, the window retains the appearance of the original.
Get a free quote for sash and case windows in Renfrew
Should you need a sash repair, restoration, or full replacement in Renfrew, Woodfellas has the expertise to handle every aspect with attention.
Contact with our team now and we will guide you on the most suitable solution for each window. All quotes are complimentary, written, and carry no obligation. If you choose to proceed, we will work around your schedule.
Every window and door is crafted within our own workshop using time-honoured methods and fitted by our own joiners throughout Scotland.
Reach out us today by calling 07920 057592 or simply fill in the form on our contact page and we will respond to you within 24 hours.