London's #1 Window Repair Expert

Timber Window Repair for Period Properties in London

Timber windows are significant source of the quality and charm of period properties. As such, they are often protected by planning law, and even when not, there is more value in looking after timber windows than replacing them.

Our skilled carpenters and joiners perform meticulous and sympathetic repairs to restore the form and function of sash and casement timber windows across London’s period homes.

Environ Property Services are dedicated to the restoration and preservation of historic fabric wherever possible.

Our director, Terry Clark, is a member of The Society for the Protection of Ancient Buildings where he is engaged with the latest research and training in best practice when performing building works on old properties.

Rot, mould, warping and sticking in timber windows can all be repaired and do not necessitate replacement. Get in touch with us now request a call back to find out how we can give your windows a new lease of life.

Should you replace or repair timber windows in a period property?

In conservation areas, you will need to ask for planning permission to modify period timber windows on the street-facing side, while listed buildings will have protections on all windows in the house.

If you are permitted to replace the windows, it is usually on the condition that the replacement are conservation approved period replicas, built exact to the millimeter with the originals.

Because of the cost involved in producing such replicas, you need to consider whether it is more cost effective to repair or replace period windows. Except for the most extreme situations of long-term neglect, most timber windows can be repaired.

Rotten sections of timber can be cut away and replaced, while warped framed can be planed and sanded back into shape. Mould is often a result of condensation, which is an issue with ventilation and moisture permeability in the property, not an issue with the window itself.

Are PVC or timber windows better for period homes?

Contrary to popular opinion, PVC windows aren’t more durable than traditional timber frames. This has been proven by the fact that many PVC windows installed in the 90s are already having to be replaced, while timber windows from the Edwardian era are still going strong.

Due to their typically very high quality hardwood construction, it is almost always advised to repair rather than replace period windows, especially because many of the problems people associate with timber windows are a result of disrepair, not the design themselves.

A well-maintained timber window will be sealed from draughts, bone dry to the touch and open and close smoothly. They add significant value to period properties and, once fully repaired, should last a lifetime.

If you want to improve the thermal or acoustic performance of your windows, we can install a second removable interior pane with opens inwards inside the property. This solution is accepted by planning departments and won’t damage historic fabric.

Sash window repairs in London

Sash windows slide up and down using a rope pulley and counterweight. This simple and durable system has lasted for hundreds of years, and with the appropriate maintenance there is no reason not to continue using sash windows.

A sash window should be able to move smoothly with no more force than the push of your finger, with no friction and no rattle and form an airtight seal when closed.

That might sound too good to be true if you’re used to poorly maintained sash windows, but we can this is how they’re supposed to work and exactly how sash windows perform after we have repaired them.

Call us now for sash and casement window repairs in London

Our quotes are based on detailed surveys of the current condition of your windows and factors elsewhere in your property. To book your survey, call now or request a call back.

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Lauren clark
Lauren clark
2023-09-28
In a panic I called environ with a rat problem, and in less than an hour later they showed up and dealt with it! Amazing efficient service, extremely knowledgeable also about the rodents/pests they deal with. Never thought I’d learn so much, but it goes to show how experienced they are. 10/10 from me, will definitely be reusing!
Phil Shaw
Phil Shaw
2023-09-21
Very professional outfit I would highly recommend
Sarota Saro
Sarota Saro
2023-09-08
Extremely pleased with the work Environ Property Services has done at my house. Jordan was very pleasant and polite, he did an impeccable job with the gutters and manhole.
Chris Castle
Chris Castle
2023-09-08
Fantastic services. Everyone was fantastic! Terry came and done the inspection and can’t thank him enough.
sophie osullivan
sophie osullivan
2023-08-23
The team at Environ has demonstrated professionalism and efficiency in their work, I am very pleased with my experience. Annie was also very helpful when i spoke to her about the services????
Aliza Shafi
Aliza Shafi
2023-08-23
I am thrilled to share my experience with Environ Restoration Services, and I must say, their work with graded building is exceptional. The importance and attention to detail they demonstrated during the planning and execution of the project were truly impressive. From start to finish, their team displayed a level of professionalism and expertise that surpassed my expectations. They took the time to understand the unique requirements of the graded building and ensured every aspect of the restoration was carried out meticulously. The final result was nothing short of remarkable. I am immensely satisfied with the outcome, and without a doubt, I will be using Environ Restoration Services again for any future projects. If you are seeking a team that values quality, precision, and care for graded buildings, look no further than Environ Restoration Services. They have earned my trust and highest recommendation.
Kevin
Kevin
2023-07-28
A big thank you to Lincoln for conducting an excellent drone survey! I truly appreciated the care and safety he demonstrated while operating the drone on my property. Highly recommended!
Monum Khan
Monum Khan
2023-07-27
Huge thanks to Environs Restoration Team for their outstanding work on restoring my London property. Even while away, they kept me updated throughout the entire project. Highly recommend them for their expertise in working on listed buildings!
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Stars
I wanted to take a minute and thank you all for resolving the damp issue we had. Its so nice to come home and not see or smell the disaster that was there before. Just in time for Christmas which I would have to say you guys saved as we have family coming who had their flights already booked. A massive relief Thank you so much!! Would definitely recommend your team from initial contact to works completed. Great job.
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Stars
I chose to use Environ to deal with a damp wall, the whole process from beginning to end has been straightforward, well explained and they've managed to strike a pleasing balance between friendliness and professionalism. Everyone they sent over during the course of the work, as well as their office staff has been, nice helpful and accommodating. I hope not to need to use them again but if I do, I'll do so gladly!
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Stars
Came round to have a look at work required and actually realised it was all low level work. Explained and showed what was required. They can back about a week later (or thereabouts) to carry out the work which was done very quickly (about an hour if I recall). Because it took less time than was originally thought have not been charged for the materials so was very happy about that.
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