Trade Windows, Doors and Building Products Supplier in Worthing & West Sussex

Here at MLI, we supply a wide range of building products and double glazing solutions. From windows, doors and lantern roofs to soffits and fascia boards - we have everything you need to complete any home improvement project.
Get in touch Composite Door Designer
Market-leading products

Market-leading products

We stock quality products, hand-picked from market leading manufacturers of windows, doors, conservatories and accessories.
Quick turnaround

Quick turnaround

Whether collecting in-store or delivering to site, we're able to fulfil orders quicker than any of our competitors.


We pride ourselves on our first-class customer service, ensuring tradespeople are able to offer first-class services in turn.

What Our Customer Say

Davyd OddyDavyd Oddy
12:46 07 Nov 23
Great service and products from super friendly staff.Specials thanks to Loretta and Stephen
Stephen GaleStephen Gale
14:31 14 Mar 23
Great service good bunch lads
13:01 24 Apr 22
So helpful - Steve was so patient while I chose my new front door - which was installed by PBM Exteriors who recommended MLI. I cannot emphasise how much my new and very contemporary front door makes the house look so modern and 'new'. Just huge thanks for great service and an amazing grey anthracite grey front door and side panels!
penelope strachanpenelope strachan
15:22 30 Jul 20
So pleased I found MLI to supply the windows and doors for my property renovation, Excellent Prices, far more competitive than any other quote I had. Service from Steve & Loretta was amazing, nothing was too much trouble. Everyone compliments us on the fantastic windows. I highly recommend. Thank you so much
gabrielle lynngabrielle lynn
10:01 18 Aug 17
This was maple leaf d/g. Had conservatory installed some years ago, one roof panel put in upside down, we could never get it changed as after service poor. Now replacing roof due to hail damage and discover all roof panels were 2 inches short so gap was plugged by sticky putty type of glue and tape, poor workmanship and measuring. Beware and follow work in progress.

Why Choose MLI?

Our staff specialise in delivering great services to busy tradespeople. Our massive range of products are expertly specified, ensuring our clients are able to deliver the perfect project.
  • A range of products and finishes for complete versatility
  • Expert staff delivering exceptional customer service
  • Innovative technology for the ideal handover

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Why Choose MLI

Our Products

We take great pride in our commitment to excellence. We are committed to supplying the best windows, doors and conservatories with care that's why you can trust us for your project needs. Our team of experts take pride in manufacturing with care using only high-quality materials and newest technology. We work hard to provide our customers with quality products and services from start-to-finish. From using only high quality materials in manufacturing, such as aluminium or uPVC frames for windows and doors, to providing free skip use, there is no better company than ours if you're looking for top notch service at an affordable price point. If this sounds good to you - contact us today!


We offer a wide range of windows with a selection of different styles available. All windows offer superior security and improved energy efficiency, while giving your home a slick, stylish new look that will stand the test of time with an extensive manufacturer’s warranty.


Our range of classic effect composite doors offer a secure but welcoming entrance to your home, while our range of uPVC doors blend perfectly with the style of your new windows. Bi-fold and French doors can be used to open up your living space to let the outside in, without compromising on security.


We offer a wide variety of conservatory styles to choose from and our team is dedicated to helping you find the perfect fit for your needs and answer any questions you may have during the selection process.

Free skip use when replacing old products with your new MLI products.

Our Brands

Latest News

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victorian conservatory

Enhancing Customer Satisfaction: Minimising Delays in Windows and Door Installation

In the world of home improvement projects, timely and efficient installations are paramount to ensuring customer satisfaction. When it comes to windows and door installations, avoiding delays is crucial to delivering a seamless experience for homeowners. In this guide, we will explore valuable tips for minimising delays and increasing customer satisfaction. 1. Partnering with Reputable […]

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upvc windows and roofline

The Importance of Health and Safety in the Window and Door Industry

In the window and door industry, prioritising health and safety is of utmost importance. Whether it’s the manual handling of heavy items, working at heights during installations, or adhering to health and safety laws, maintaining a safe environment is crucial. This article will highlight the significance of health and safety in the window and door […]

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    MLI Building Products

    Our Opening Times

    8am to 5pm Monday - Friday

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