Windows and Doors for
Developers and

If you’re in the trade, we want to help you find the best windows, doors, roof lights and more for your projects and your customers.

Whether you’re building new homes, renovating period properties or building an extension on a semi, Koncept is here to help. Call us with your requirements and a rough sketch plan with dimensions, and we’ll send you a detailed quote for high spec, energy-efficient:

  • Double and triple glazing windows
  • Secure and smart uPVC, composite and timber doors
  • Stunning roof lights that are weathertight and thermally efficient
  • Elegant, planning-friendly, made-to-measure orangeries
  • Windows and doors for eco-build and passivhaus projects

Why work with Koncept?

Our founder, Chris Hibbert, has worked in the industry for years. He’s made it hisbusiness to know vast amounts about the products Koncept sell and the industry heoperate in. (He is a serious window and door geek!) He’s done the research and checked out the specs, so you don’t have to.

Chris takes a highly technically-focused approach to sales, and is always keen to find the most cost-effective solution for a client. Chris doesn’t employ a sales team in flashy cars, so you’ll deal with him direct. Chris’ aim is to help you achieve the best possible results for your clients, for the best possible price. He backs this up with good old-fashioned customer service. He’s seen first-hand the way after-sales care drops off in big companies once it’s out of the hands of a sales team, and he hates that as much as you do.

Your project, your way

At Koncept, you can choose how involved – or not – you want us to be.

Supply Only

As a trade customer, you can purchase all our windows, front doors, aluminium bi-folding doors, sliding doors, flat rooflights and roof lanterns on a supply-only basis. You can collect in person from our Wokingham depot, or we’ll deliver direct to site at a time to suit you.

Supply and Installation

If you’d prefer not to fit or install the products yourself, we have fully qualified MCT accredited survey and installation teams to do the job for you. We’ll work with you and your timescales to ensure timely delivery and installation to keep you on track and on target for your finish date. All replacement items fitted by one of Koncept’s team are eligible for CERTASS certification. (Products installed into new openings in an extension or new build property will be signed off by building control, as you know!)

10 year guarantee

We are proud members of The Customer Protection Association ( and, as such, all of our installations are covered by a 10-year, insurance-backed guarantee, giving you complete piece of mind that your home is in safe hands.

Trade Loyalty Card

Partners & Accreditations