10. (C) Vermiculite and Cement Layer (insulation)

 1. In a wheel barrow mix your vermiculite with cement in a ratio of 5:1. (Make sure you wear a dust mask). You will need to make three seperate wheel barrow loads so it doesn’t set before you can use it. 

2. Apply by cupping the mixture in your hand and applying to the surface in a thick layer (20mm). Work with a trowel. 

3. Dry at least overnight.Cover with tarpaulin if it rains.  

NB: This layer is quite crumbly so it 

needs a bit of work  with the trowel to 

get it to bond. You can take this layer

up the chimney if you like. We placed 

it to the top of our chimney