Thermal insulation 3/16" 17 yards large roll or $3.00 per yard

bubble insulation, $3.00  per yard  
a radiant barrier material used for thermal insulation. 
It is constructed with polyethylene bubbles sandwiched between layers of reflective aluminum foil. 
It reflects up to 97% of radiant energy, helping to keep spaces warmer in winter and cooler in summer. 
It acts as a vapor barrier and is lightweight and waterproof. 
Commonly used in attics, garage doors, basements, and for ductwork insulation.