Free building advice

The following are links to free building advice from various manufacturers.

We are investigating the use of Rockwool for under the slab insulation and Rockwool provide access to scientists for advice on the usage of it in this application (and other applications) – 
https://www.rockwool.com/technical-resources/building-science-support/
(I believe Rockwool Comfortboard is known as Rocksol in Europe) 

Good information here https://www.apawood.org/buildabetterhome