The r value will be based on the cavity space allowed between the roof sheets and the foil. R value is used as a measurement of the effectiveness of thermal insulating materials. In fact sisalation foils and radenshield can be given a down r value if installed according to special conditions.
ppgl steel sheets
roof sinks in the corner
plain grey rugs for living room
premade garage roof trusses
roof top punsch wien
pro roof contact details
roof terrace dim
roof terrace paving pedestals
