Between the ceiling of the house and the metal roof you might have a layer to act as a water barrier another one for thermal insulation and yet another reflective layer for insulation.
Roofing reflective underlayment.
Item 169827 model 5003002.
Therma sheet roofing underlayment is manufactured in the usa by environmentally safe products inc.
When there is an airspace between the 2200 series underlayment.
Rfoil reflective insulation 2200 series underlayment in an effective energy efficient barrier that can greatly reduce transfer of radiant heat through roofing.
The product is very lightweight and easy to install.
The reflective layer applies in hot regions to resist the build up of heat in the building.
Preferably it is used in conjunction with traditional felt paper.
The new 2200 series underlayment s polyethylene bubble material sandwiched by a layer of metalized foil and a white polyethylene sheet provides an added r value of 1 1.
And this synthetic roof underlayment becomes famous due to its quality easy installation process and affordability.
This smart and competent armorlay 25 synthetic roof underlayment is the most useful thing for every house roof.