We are a family run, Orpington-based manufacturer & installer of windows, doors, glass roofs & bespoke glazing solutions for London & surrounding counties.

Established in 2002, we have spent many years researching the best profiles, components and technologies for residential use, currently manufacturing in a range of timber materials, aluminium and uPVC.

Our wide range of fenestration products for new builds, self-builds & renovations extends from traditional and heritage timber sash windows, bespoke timber entrance doors to modern roof lights, bi-folds and sliding patio doors with our signature slim frames of large aluminium HiVision 25 Sliding Doors and steel-looking Cube windows.


Award Winning Manufacturer

2019 Winner in Best Timber Windows & Doors Manufacturer - London and The South East category, by BUILD Construction & Engineering Awards.

Made to requirements

We tailor our products and  process to meet the needs of each individual customer and project. We design, manufacture and install stunning aluminium, timber and uPVC fenestration products - all bespoke to your requirements. Superior quality bifold doors, french doors, roof sky lanterns and even orangeries and double glazed conservatories.


At Grabex, we are conscious of our planet and always try to choose the most environmentally friendly and sustainable options. We are a responsible manufacturer, sourcing materials from suppliers who practice sustainable development and recycling virtually all of our waste.