Hi, I have bought a Truma 6E boiler. It says not to have any combustible flooring under the boiler. The YouTube videos I have been following have either Altro flooring or some other type of decorative flooring under the boiler. It is going to be easier for me to fit the Truma unit over the Altro floor. Any advice or views? I'm not ready to fit all the flooring but as I have a 'garage' area under the fixed bed I can get the back end done before I fit the front. The biggest problem I'm finding with this build is sequencing the next job. Building a house is a doddle compared to this.