new tw logo 2019'1
Photo by Emma Caragh Walls
Photo by Emma Caragh Walls

Who Are We?

TW Roof Estimating are based in Glasgow and headed up and run by Tom Walls. Tom has over 39 years experience in the roofing industry, and has been providing pitched roof estimates for over 35 years. He spent 13 years with one of the market leaders Marley Roof Tiles where he gained his qualification in pitched roof estimating with the NFRC (National Federation of Roofing Contractors). Tom has also worked with another market leader, SIG Roofing Supplies, for over 20 years.

In 2014, Tom set up TW Roof Estimating and provided his unique service exclusively to SIG Roofing Supplies. Since then, he has developed and refined the services provided by TW Roof Estimating and we are now the top choice for roofing estimates, providing our specialist service throughout the UK to companies and private individuals alike.

What We Do...

Our professional estimating service delivers a cost effective solution for you, whether you are a Builder, Roofing Contractor, Manufacturer, Architect, Online Roofing Supplier, or are completing a Self Build, re-roofing or building a brand new pitched roof involving any type of concrete or clay tiles, natural, fibre cement and man made slates, gutters and downpipes.


Our industry leading estimating service is based remotely which enables us to provide you an accurate list of materials, no matter where you are in the UK. You can send details of your project by email, post or even hand deliver them to us, and we will do the rest!

We can calculate the quantities required from architect’s drawings, bills of quantities and even from a hand drawn sketch with measurements stated.

Completely independent, TW Roof Estimating will provide you with a comprehensive and easy to understand list of materials which you can then use to get the best prices from different suppliers, safe in the knowledge you are getting the right materials in the correct amounts.

We Are The Specialists You Need!

TW Roof Estimating specialise in many manufacturer’s products including Marley, Redland, Russell and Sandtoft as well as natural slate from various sources. We can also provide our service on any other manufacturer's product you are planning to use too!

We aim to have the comprehensive list of materials needed for your project with you in 48 - 72 hours, however larger or more complex roofs and sites can take a little longer, but we will let you know if this is the case...

Want more information?

Just click the button and fill in our contact form with your questions, we'll come back to you as soon as we can...