Quality Control
Quality guaranteed
We use Accoya timber in almost all of our projects, ensuring your windows and doors will last a long, long time. Find more info below about Accoya wood.
Our windows are made in Britain and we will colour match to paint brands such as Farrow and Ball and Paint & Paper Library.

Accoya wood
Accoya long life modified wood has become the timber industry benchmark for performance and sustainability. No other timber can offer this combination of stability, durability and versatility. This modified wood is sustainably sourced with FSC® certification and it has minimal environmental impact throughout its entire life; from production, through its use, right the way to the end of its life.
Performance – Beyond any other wood
Accoya brings unprecedented reliability for timber; it is checked and trusted not to visibly swell, shrink or distort. Highly durable, it withstands the test of any climate. And what’s more, it stays that way – a 50 year above ground, and 25 year below ground and freshwater warranty are testament to the fact that you can expect to enjoy your Accoya wood for many decades to come.
Finish – With the ultimate consistency and quality
Finish sums up many of the reasons architects and manufacturers love working with Accoya – coatings look brilliant and last longer, generally require less maintenance saving time and money in the long-term. It also offers huge design freedom, with the ability to create a multitude of textural finishes such as smooth, charred and brushed, plus bespoke size and finish options for endless creativity.
Sustainability – Unrivalled anywhere in the market
Accoya is the truly sustainable choice that helps you meet global challenges like climate change. From source to production and through to end of life, sustainability shines through. Accredited by the FSC® and Cradle to Cradle Gold certified™, it is the only construction material in the world to achieve C2C Platinum certification™ for Material Health. With a low carbon footprint, you can help combat carbon emissions for a healthier world. It’s also non toxic, so safe for people and pets as well as the planet.
50 Year Guarantee Above Ground
The generic term for Accoya is acetylated wood. Acetylated wood had been studied by wood scientists for many decades before Accoya came to the market. Consequently, there are examples of long term trials where acetylated wood has demonstrated its exceptional performance.
In addition, there is a standard European test for the durability (rot resistance) of timber by which it is possible to directly compare the durability of Accoya with that of any other timber and since we know what to expect from the other timbers we can conclude what to expect from Accoya. Both the BRE (Building Research Establishment) and TRADA (the UK’s leading independent timber research association) support the claims made about the durability of Accoya and therefore we can offer the unrivalled 50 year warranty.
EXCELLENT Based on 39 reviews Alice Prentice16 December 2024Trustindex verifies that the original source of the review is Google. I really recommend Deltahome - we had our french doors replaced after Greg knocked on our door. They were faster and more competitively priced than two other quotes we received and the quality of the doors and the fitting is great. Communication throughout was very good too. Thank you! Sianne Schwikkard7 December 2024Trustindex verifies that the original source of the review is Google. Wonderful service from Greg and Delta homes. We had a coloured glass feature window which needed a new frame. The glass was safely removed and refitted in a new frame. It looks fantastic and we were so glad not to lose this feature window. berkeley 473222 April 2024Trustindex verifies that the original source of the review is Google. Greg and the Delta team installed two hardwood casement bay windows in my SW12 terraced house. From beginning to end their service was excellent. The windows are high quality (leaded glass included) and the installation was quick and efficient. I would highly recommend! david hughes7 February 2024Trustindex verifies that the original source of the review is Google. An excellent solution to a difficult job The quality of the door is first class Jaime Rowbotham6 January 2024Trustindex verifies that the original source of the review is Google. Deltahome did an excellent job of replacing four sets of windows (some of them very big bays) and a pair of patio doors in our Edwardian house. The attention to detail was high (taking care around stain glass casements, colour matches, fixtures & fittings etc), the accoya product is high quality and with the 10-year guarantee & FENSA certification we should be well set for the future. Thanks to Greg, Jamie & the team - we would highly recommend Deltahome. Mike Campbell3 January 2024Trustindex verifies that the original source of the review is Google. We used Greg and Delta to refurbish and replace windows across our Victorian home. They were very responsive, and proactive in helping us with this element of the refurb of our house, with the windows being installed on time and with minimal fuss, and the end product is great. Thank you Megan Taylor5 December 2023Trustindex verifies that the original source of the review is Google. Greg and his team did a great job with a full replacement of all windows in our Victorian terraced home. Quick, communicative, and good quality. Thanks. Richard Symington1 October 2023Trustindex verifies that the original source of the review is Google. We are absolutely delighted with all three windows you have installed. They are all superbly fitted, without any lateral movement, all painted with a number of coats, and the glass impeccably cleaned. Your Team did a really good job, and left each room spotless. It was a pleasure having your people working in the house. Victoria T21 September 2023Trustindex verifies that the original source of the review is Google. We used Deltahome to replace the sash and casement windows in our attic of our Victorian home. We live in a conservation area and I was keen to ensure that the new windows would look as close to the original design as possible with the added benefit of having modern features such as better insulation and sound proofing properties. We’ve not had a cold enough snap to test the insulating qualities, but I’m very happy with the windows appearance and the reduction of sound coming from the road and an adjacent park. The window installer, Dave, did a superb job, was very professional and polite, arrived on time, fitted the windows with care, and tidied up after each day of work. Greg was also very professional - a great communicator, checked up on work progress, and delivered exactly what he said he would deliver. We used Deltahome on a recommendation from two people and I would not only use Deltahome again in the future but also recommend Deltahome to others. Victoria Gilbert11 June 2023Trustindex verifies that the original source of the review is Google. Greg offers a great service at good value. Our new windows are brilliant quality.

We are extremely pleased with our replacement double glazed sash window which was badly rotted. The old window was removed and the new one installed with no damage whatsoever and the room was left clean and tidy- job completed on one morning. The new window is 100% better than the old one! I could not recommend Gregg and his team more highly.
Victoria W.