Wooden Sash Windows Installation & Repair in Islington
We provide professional wooden sash windows installation in Islington, supplying and fitting high-quality timber windows made to suit your property. Each installation is carefully measured and installed to ensure smooth operation, excellent insulation, and a classic appearance that complements traditional London architecture.
Our timber sash windows can include modern glazing options, discreet draught proofing systems, and secure fittings, delivering modern performance while preserving the character of your home.
Our wooden sash windows repair services in Islington address common issues such as stiff or jammed sashes, rattling panes, draughts, and decayed timber. Many sash windows can be restored rather than replaced, and we always aim to retain as much of the original material as possible.
We carefully assess each window and explain the best solution, whether that involves minor repairs, timber splicing, or targeted part replacement.
When repair is no longer practical, we offer full wooden sash windows replacement in Islington. New timber sashes are custom-made to match the proportions and style of your existing windows, ensuring compliance with conservation requirements where needed.
Replacement sash windows improve thermal efficiency, security, and ease of use, while maintaining the traditional look that period homes demand.
Our draught proofing services for wooden sash windows in Islington are designed to eliminate cold air ingress, reduce noise, and improve energy efficiency. Using specialist draught-proofing systems, we seal gaps without affecting the appearance or operation of your windows.
This service is ideal for homeowners looking to improve comfort and reduce heating costs without replacing their original sash windows.
Broken or worn cords are one of the most common sash window problems. We provide precise wooden sash cords replacement in Islington, restoring proper balance and smooth movement to your windows.
Correct sash cord replacement ensures the window opens and closes effortlessly and safely, preventing further strain on the frame and hardware.
Across every project, we focus on clear communication, tidy workmanship, and respect for your home. Floors and furnishings are protected, disruption is minimised, and all work is completed to a high standard.
Much of our work comes through recommendations from satisfied customers in Islington and surrounding areas, reflecting the care, honesty, and attention to detail we bring to every wooden sash window we work on.
Timber Sash Windows in Islington.
Klis Joinery & Carpentry Ltd is Specialist timber sash window repairs, refurbishment, and replacement in Islington.
Local London joiners working on Victorian, Georgian, and period properties.
At Klis Joinery & Carpentry Ltd, we focus exclusively on timber sash windows in Islington, providing skilled repairs and restoration that protect the character of period homes while improving performance and reliability.
Many sash windows do not need replacing. We prioritise repair and refurbishment first, helping homeowners avoid unnecessary costs while extending the life of their existing windows.
We offer a complete range of sash window services, including:
All work is assessed on-site to determine the most practical and cost-effective solution for your property.
What Happens When You Call
You speak directly with the joiner
We arrange a site visit in Islington
Your windows are inspected and explained clearly
You receive honest options — repair where possible
No call centres. No sales scripts. Just practical advice.
Islington is known for its Victorian and Georgian architecture, where traditional timber sash windows are a defining feature. These windows require specialist joinery skills to maintain both appearance and function.
Our experience working on period properties across Islington allows us to deliver repairs and restorations that respect original detailing while improving usability, insulation, and longevity.
If you’re looking for timber sash window repair, restoration, or replacement in Islington, speak directly with a local specialist.
Free site visit • No obligation • Local joiner
A close team with more than ten years of hands on experience in wooden sash and bay windows, treating every home as if it were our own.
Classic timber frames combined with modern draught proofing, double and triple glazing, and careful sealing to keep homes warm, quiet, and efficient.
We visit, inspect your windows, and talk through repair and replacement options in simple terms, with written quotations and no hidden extras.
Yes, we repair old wooden sash windows as well as install new ones. We can replace cords, restore timber, improve glazing, and draught proof older frames so they work smoothly again.
We can match the original style, proportions, and detailing of your existing windows. All timber frames are crafted to suit the character of your home, especially in period properties.
Double glazing has two layers of glass, while triple glazing has three. Triple glazing offers better insulation and noise reduction, but both options improve warmth and comfort.
No. Draught proofing is fitted discreetly inside the frame, so it does not change the appearance of the window. It simply makes the home warmer, quieter, and more efficient.
Yes, we offer a prompt emergency service for damaged windows or conservatories. We secure the area and provide either a temporary fix or a full repair depending on the situation.
In many cases rotten timber can be repaired by replacing only the affected sections. If the damage is too severe, we will advise whether new windows are the better long term option.
The time depends on the number of windows and the complexity of the job, but most installations take between one and three days. We always keep disruption to a minimum.
Yes. We offer a supply only option for homeowners or builders who need high quality timber windows ready for installation, made to your exact size and glazing requirements.
The cost can vary depending on the size, design, glazing type, and property requirements. On average, wooden sash window installation in London can range from £1,200 to £2,500 per window.
Wooden sash windows are often preferred for their classic appearance, durability, and suitability for period properties. They also add more character and can increase property value compared to uPVC.
Yes, in many cases sash windows can be fully restored. Repairs may include replacing cords, fixing rotten timber, draught proofing, and upgrading glazing without replacing the entire window.
With proper maintenance, timber windows can last 50 years or more. Regular painting and minor repairs help extend their lifespan significantly.
Draught proofing involves sealing gaps around the window to prevent cold air entering and warm air escaping. It improves comfort and energy efficiency without changing the window’s appearance.
Both, services typically include full supply and installation, as well as repairs, upgrades, and maintenance depending on your needs.
Yes, bespoke timber windows can be crafted to match original designs, ensuring consistency with the property’s character.
They do require periodic maintenance such as painting every few years, but modern treatments significantly reduce upkeep compared to older timber windows.
Sash windows slide vertically, while bay windows project outward from the wall, often consisting of multiple window panels.
Yes, rotten sections can often be cut out and replaced with new timber, restoring the structural integrity without replacing the whole window.
Restoration preserves the original character of the property, is often more cost-effective than replacement, and is more environmentally friendly.
Yes, especially when combined with draught proofing or double glazing. Modern timber windows can achieve excellent energy performance.
Typically, installation takes around 1 day per window, depending on access, condition of the existing frames, and project size.
In some cases, especially in conservation areas or listed buildings, planning permission may be required. It’s always best to check with your local authority.
Yes, many original timber windows can be upgraded with slimline double glazing, maintaining the traditional look while improving insulation and energy efficiency.
If you would like advice, a free estimate, or urgent help with your timber windows, simply call or send a message and we will be happy to assist.
