About CDI - CDI
SE5 Architects Project
About CDI

About CDI

CDI Innovative Construction Materials Ltd is a family run business specialising in a range of high performance floors.

At CDI, we pride ourselves with providing a personal and professional service to ensure that our floors meet the highest expectations of each client and project, our approach is to ensure any technical or buildability questions are answered quickly and efficiently.  Our aim is to push the boundaries of what can be achieved with our systems to solve the interesting situations that our customers find themselves in when searching for a solution to their individual refurbishment or build.

We cover the whole of the UK and Ireland from our office and warehouse in Co. Durham in the North East of England. We can often be found on the road, on the train or in the air, visiting Architects, Engineers, building sites and clients to give CPD style presentations or instructions on how our systems are installed to achieve the desired results. We also spend a lot of time at trade shows showing off our systems and getting to talk and discuss face to face with potential clients on how our systems will benefit differing types of construction projects from small domestic extensions to large multi-storey buildings.

CDI are the sole distributor for all Reppel bv. systems within the UK and Ireland, these include the Lewis Deck, Op-Deck, Lacomet, Hody, Max4 and Lewis FastSlab systems.  The Lewis FastSlab foundation system is our own system, tying together a number of elements from a number of manufacturers both here in the UK and over in Holland.

Our small but professional team are always on hand to discuss ways in which we can help you get the most out of what ever project you may be looking to develop. Please feel free to contact us either by phone, email or through the chat function on this website and we will happy to start a conversation.



General Contact Enquiry Form
  • This field is for validation purposes and should be left unchanged.

Company History

CDI Innovative Construction Materials evolved out of a family business set up by Ian Larnach in 2002 called Ian Larnach Associates (ILA). Initially ILA ran as a construction consultancy business to help introduce new products into the industry as well as providing sustainability and Code for Sustainable Homes services. Ian initially discovered Lewis Deck on the …

Read More

Ian Larnach Associates

Ian Larnach Associates were formed by Ian Larnach in 2002 and were dedicated to Constructing Excellence and Egan Principles. Its intention was to drive forward with the introduction and delivery of new innovative products, systems and new ways of working from within the supply chain. From early involvement with projects it provided a valuable service to …

Read More

Our Philosophy

Our Philosophy is very simple, we’ll do whatever we can to help you get the system you need and provide the support you need through design to installation.

Read More

Meet the team

CDI has a small but experienced team. Chris has a varied CV, but has spent the better part of the last decade in the construction industry advising on sustainability and assisting a number of projects to win national awards, he tends to lead the charge on the technical aspects of the specification of the various systems. …

Read More


What does “Delivery” mean? Well for us it could mean a couple of things. The obvious one is how doe we get our systems and products to you? This is the simple one to answer, it’s however we can. We utilise a number of different solutions when it comes to actually getting our products out …

Read More

Latest Blog

CDI 2024

Cow Close Barn Conversion house build

Cow Close Barn with Heat Pump and Underfloor Heating

26th May 2023

Paul M contacted us in early 2022 to discuss the use of the Lewis Deck system following a recommendation by his Ground Source Heat Pump system installer. We worked through the drawings and provided a quote, the Lewis Deck and…

View All

2022 Has Begun and Exhibitions Are, Fingers Crossed, Back To Normal.

21st January 2022

Starting on Friday 28th January, now that COVID has magically disappeared, we are heading back on the road and will be exhibiting for a full year for the first time since 2019. Next Friday sees the first exhibition at the…

View All
Lewis Deck Logo

Lewis Deck Brochure Content

22nd November 2021

As part of a joisted floor construction, LEWIS® Dovetailed metaldecking provides a first class solution for ACOUSTICS, FIRE PROTECTION and workswell with UNDERFLOOR HEATING AND COOLING systems.LEWIS® Dovetailed metal decking solutions are used in a range of applications includingrenovations and…

View All
View All

Chat Live

Hi you're speaking to Dave, how can I help.

Website by Indigo

About CDI - CDI