Chimney for your boiler stove
This is especially true when you are burning wood.
Flexible liner for existing chimneys
If you are using an existing chimney then often the best option is to run a flexible stainless steel liner down the chimney and then insulate around that either using chimwrap, rockwool sleeves, or leca backfill.
Creating a new chimney in an existing house
An easy way of creating a new chimney in an existing house is to use twin wall insulated chimney. These stainless steel lengths of pipe twist lock into each other with the join held firmly by a locking band. Running twin wall insulated chimney through your house should result in only minor disruption: the flue may be run 50mm from combustible materials, and there are easy to use components to support and take the weight of the flue as well as make floor and roof penetrations easy.
Pumice chimney for newbuilds
If you are building a new house or extension, or carrying out extensive refurbishment then a pumice chimney system may be the best option. The chimney is built from prefabricated sections which are quick to install and are take up less space than a traditional brick or block chimney. The resultant chimney is well insulated and can withstand very high temperatures.