At SashWise, we are passionate about preserving the beauty and character of London's period homes.
At SashWise, we are passionate about preserving the beauty and character of London's period homes. We understand the importance of timber sash and casement windows – their elegance, their functionality, and their contribution to the city's architectural heritage. But we also understand the importance of preserving our planet and keeping our carbon footprint as low as possible. We recognise that the raw materials of our industry, most noticeably timber, is a precious resource that must be used prudently. That is why we are incredibly proud of our partnership with Ecologi, a fantastic organisation dedicated to tackling the climate crisis.
Every time an order is placed with SashWise, we fund the planting of a tree!
We believe all businesses should be part of the solution to climate change. We have always tried to be environmentally friendly in how we work and the materials we use, but we wanted to do more. We wanted a real way to actively help forests grow and reduce carbon in the atmosphere. That's why we teamed up with Ecologi.
Ecologi is a fantastic organisation that makes it easy for everyone, businesses included, to take action on climate change. They fund all sorts of amazing projects in the UK and around the world – from planting new forests to developing clean energy and protecting the trees we already have. They arere totally transparent about where your money goes, so you can see exactly what impact you are having.
Ecologi really impressed us because they are all about doing, not just talking. Their projects are carefully chosen and make a real difference to the environment. We also love how transparent they are. They keep everyone updated on the projects they support, so you can see the positive changes happening.
... and Counting!
Trees are so important for our planet. They soak up carbon dioxide, which helps fight climate change. They're also homes for wildlife, they stop soil from washing away, and they even clean the air we breathe. Planting trees is a simple but powerful way to make the world a better place.
For us at SashWise, planting a tree with every order is not just a nice idea – it is a real commitment. It is our way of giving back to our customers and the planet.
Since we joined forces with Ecologi in 2025, we have funded the planting of over 50 trees! That is a brilliant start, and we are so grateful for everyone's support. Every tree makes a difference, and we can't wait to see our little forest grow!
• Real Action on Climate Change: We're helping projects that are making a real difference.
• Smaller Carbon Footprint: We're helping to balance out our carbon emissions.
• Protecting Wildlife: More trees mean more homes for animals and plants.
• Doing Our Bit: We're showing we care about sustainability.
• Happy Customers: You can feel good knowing your new windows are helping the planet.
We only use Accoya timber in the manufacture of all of windows and doors. Accoya is made from sustainable wood which provides maximum resource while locking in carbon from the atmosphere.
Accoya timber goes through a process of acetylation that significantly increases the durability and stability of the raw timber, prolonging its useful life. This role as a ‘carbon sink’ means Accoya captures carbon dioxide from the atmosphere and locks it in for longer thereby helping reduce carbon emissions in the atmosphere.
Accoya wood is certified by the Forest Stewardship Council, meaning the timber comes from forests that are managed in an environmentally appropriate, socially beneficial and economically viable manner.
For more information on Accoya see our dedicated webpage: Introducing Accoya
All of our aluminium windows and doors are made from 100% recyclable aluminium, helping to promote a sustainable society.
We have made a conscious decision to stop all forms of paper based marketing materials. We no longer produce and distribute leaflets, our marketing brochures are only available in an online downloadable format and we have moved away from all forms of print media.
Our back office is all Cloud based and we have installed a comprehensive Customer Relations Management system. Customer enquiries, quotations, contracts and invoices are all done electronically.
We have electronic tablets for sales appointments and surveys.
Our fitters have a dedicated mobile app that provides job scheduling, client information, installation and fitting instructions.
Thereby doing away with the need for endless and unnecessary paperwork.
We dispose of our waste in the most environmentally efficient way possible.
Old timber frames, uPVC and aluminium windows are removed from site by our installers and brought back to our workshop. We have a service agreement with a local commercial waste management company that collects all of our waste on a fortnightly basis. It is transferred to their depot where it is sorted into the different components and disposed of in the most appropriate manner for each material. 96% of our waste materials are recycled.
At SashWise, we believe we have a responsibility to care for the environment. We are always trying to reduce our impact, from the materials we use to how we work. Ecologi is just one part of our plan to build a more sustainable future.
We are so proud to offer our customers beautiful, premium-quality sash windows that also help the environment. When you choose SashWise, you are not just improving your home – you are investing in a greener future for everyone.
We're always happy to discuss your timber window and door needs. Whether you're looking for advice, a detailed quote, or simply want more information about our services, our friendly team is here to help.
