100's of Composite and uPVC Doors to choose from.

Very competitive prices, just give us a call.


What makes us different from other double glazing companies is that from the first contact with us its very straight forward and hassle free as you only deal with the one person from the very start to the finish. Once you've made up your mind that you want us to give you a cost just call us, e-mail us or fill in the short form on this website and we will come out at your convenience and we will take quick sizes and give you any advice you require. The average time for our visit is around 15 minutes, WE DO NOT USE PRESSURE SALES. We will then contact you the next day or as soon as we can with a cost. Our cost to you is always very competitive so assuming you are happy and want to go ahead we will then arrange a true measure of your frames and a date would be set for the installation, its as simple as that. We also recommend that you take a visit to our showroom/office to see the product. Remember our windows and doors are manufactured to very stringent British Standards.

With 40 years experience in the Glass/Glazing and uPVC manufacturing side of double glazing you can have confidence in your investment when you deal with the owner directly from Fortress Doors and Windows Ltd. Based in Wishaw, North Lanarkshire we have been installing frames and supplying them to the trade since 1995, establishing ourselves as a trustworthy and knowledgeable company who care about our installations before, during and after the work has been completed. As we are a family run company who care about our installations you can rest assured we we will give you our full attention throughout your installation. Each product is made-to-measure and is focused on your exact specific requirements.Whether you want to replace your home's entrance with a new high security door or you're looking to upgrade the windows in your home, get in touch with us today.

We only use the highest quality energy saving glass.

Upvc doors in Wishaw North Lanarksire.

With a wide range of door styles to choose from you won't have to look any further than Fortress. Our prices are very competitive and with our 10 year guarantee you can rest assured that your investment  in your home improvement was a satisfactory transaction and one you will enjoy for many years,

We can supply uPVC, Composite, French, Patio, Tilt & Slide Patio's, Bi - Folding, Stable and Composite Fire Doors, all made to measure and fitted by our experienced installers. Usually within 3 weeks of final measure.

Composite Doors in North Lanarkshire
uPVC Stable Doors in North Lanarkshire

All our doors can be manufactured in any colour you prefer. Whether it be Anthracite Grey, Rosewood, Woodgrain, Sherwood Oak, Chartwell Green, Black just plain white, just ask and we can arrange a free no obligation quote.


High quality, safe and secure, heat retaining and cosmetically beautiful, just some of the aspects of the windows available from Fortress Doors and Windows Ltd.When you take into consideration we have been supplying and installing for 25 years you should be confident with your investment.

uPVC Tilt and Turn Windows Lanarkshire
uPVC Windows Lanarkshire

We can manufacture your windows to any shape or size you require. Our windows are steel reinforced to extrusion specifications and can be upgraded to Secure by Design locking system on request with certification. Our glass is Low E (ECO) as standard with Argon Gas and Swiss spacer bar.

uPVC Sliding Sash windows Lanarkshired


Covering all areas including:

Wishaw, Motherwell, Hamilton, Bothwell, Carfin, Bellshill, Carluke, Lanark, Newmains, North Lanarkshire, South Lanarkshire, Larkhall, Cleland, Shotts, Salzburgh, Livingston, Bathgate, Edinburgh, Uddingston, Holytown, New Stevenston, Airdrie, Coatbridge, Cambuslang, Rutherglen,Glasgow, Glasgow South, Glasgow North, Glasgow East, Glasgow West, East Kilbride, Falkirk, Linlithgow, Newton Mearns, Bearsden, Milngavie, Strathaven, Stonehouse, Kilmarnock, Ayr, Lesmahagow, Douglas, Carstairs, Stirling, Whitburn, Carnwath, Bishopbriggs, Cumbernauld, Kirkintulloch, Kilsyth.

Fortress Doors and Windows Ltd

Unit 1 Pickerings House,

Netherton Road,


North Lanarkshire


Monday to Thursday 8:00 - 4:30

Friday 8:00 - 3:30

Saturday 8:00 - 12:00  (Call before hand as sometimes we are out on site)

Sunday - Closed

VAT Reg: 659 0687 92

Company Reg: SC 165 708

Kommerling Window Systems Scotland