Rigid twin wall flue is used where there isn’t an existing chimney. It’s a little larger than flexible liner because it’s built with a layer of insulation between two sheets of stainless steel. The standard diameter of twin wall for a wood burning stove would be 200mm external / 150mm internal.
Twin wall flue is suitable for internal and external installation so you can either have it run up through your house, up the outside of a side wall, or even freestanding to a height of 3m above a roof. The regulations can be strict but there’s loads you can do with it, so get in touch and we'll discuss your options.
As with flexible liner, there’s a lot of twin wall products on the market and they can vary in quality. When we supply twin wall flue for our jobs we either use Schiedel or Poujoulat, both brands with excellent reputations. Schiedel even paint their twin wall in any RAL colour you choose. Perfect for blending in with the wallpaper.
Twin wall flue can require planning permission. We always recommend you seek advice from your local planning department in the early stages of arranging a twin wall project. If an application is required we can provide you with all the architectural drawings and specifications you’ll need.