Pumice chimney systems were first used in Denmark for use with wood burning stoves and form a durable insulated masonry chimney. Pumice chimneys are very well insulated and are a much better choice than uninsulated terracotta liners. This is especially important when connecting the chimney to a stove. There are two main types of pumice chimney systems:
The material costs for this type of pumice chimney liner are lower than for the DM system or Scancore single block, but the labour costs are higher and it takes longer to install and the chimney will inevitably be bigger. You might like to read more about Isokern pumice chimney liners
Material costs are higher for DM block system but installation is much faster and easier. Ideal for self-build, the DM system forms the smallest masonry chimney and so takes up less living space. DM is a modular pumice liner system with hexagonal inner liners that fit inside square outer casing sections. Ties hold the chimney into the adjacent wall or where the chimney is freestanding stainless rods can be fixed into the floor slab, run up through holes in each corner of the casings and then tentioned to strengthen the chimney. You might like to read more about Isokern DM pumice chimney system
In terms of design pumice liner systems are a little involved and even when we are working with architects we discuss the system design on the phone direct.
There are many things to consider with pumice chimneys for example truss widths on new builds and the ventilation requirements for fireplaces.
Please contact us and one of our flue design experts will get back to you.