We have been designing twin-wall chimney systems since 2007 (in winter we will often do 5-10 designs a week).
We use our own twin-wall design software which is accurate to within millimetres.
Just drop us an email using the Contact Form (orange button right side of site or in footer) to express interest and provide your email. Ideally let us know the answers to the questions below (see QUESTIONS FOR YOU).
Once we have corresponded via email and have the answers to our simple questions we will request a half dozen or so simple measurements and from this we can create a quote.