My builder uses Houzz Pro to plan the timeline and give detailed estimates and daily updates with photos of progress, and provide invoices at pre-agreed key points in the build. This made the whole experience much more efficient and stress-free.
It is my understanding you need a recessed fireproof material in the underside of a wood mantle to be to code or it has to be quite far away from the gas or wood firebox?
Fratantoni Lifestyles