You also might have the alternative of buying quality products for the contractors to use, if this helps to improve your planned project or for keeping costs low, not just the contractor.

Here is a tip that worked for me for lowering energy bills if needing drywall or possibly wood paneling projects that is difficult to find.

I don't want to keep this a secret, because this insulation project works at the recommended levels for helping dismiss global warming, thus is good quality insulation hard to find.

I found out Energy Conservation Specialists built a radiant barrier high energy model contest left in place for 10 years and is still winning every contest held on a yearly basis against all other insulation products that are as far as I know created by the many well known manufacturers.

Exploring a bit more, I than found out you could use Energy Conservation Specialists high r-value radiant barrier foils behind wood panel even, or drywall and plywood, instead of inside the walls if using one layer per wall to fully mock this ECS contest model. All you need to do, at very minimum, is to make sure two opposite exterior walls have one radiant barrier foil's shiny side facing the other exterior wall's held radiant barrier foil shiny side. This is what builds the high r-value protection indoors, but getting all four exterior walls is proven unbeatable, and should be made permanent.

A non-thickness solution for high r-value protection that works. These are not low r-value radiant barrier and seem to be difficult to find because their used inside the more advanced projects around the world. On the Internet these RBs are reduced by as much as 3-4 times for found lowest insulation costs on the entire Internet.

Energy Conservation Specialists is found on the Internet or eBay very easily by business or do-it-yourselfers and my blog often posts more found useful ideas or details as is found by me at http://bloggingchoices.blogspot.com/, just to encourage everyone has found a way to reduce global warming.