These new roofs can be either low sloped less than 2 12 functional roofs or high pitched greater than 2 12 architectural roofs depending on the expectations of the building owner.
Retrofit installation pitched roof.
This system would consist of a base clip variable height post and a purlin system that would create the required positive pitch for a new metal roof panel system says chuck howard pe president of metal roof consultants inc cary n c.
The use of metal retrofit roofs allows the flat roofed buildings to undergo a transformation into a sloped roof building.
Mcelroy metal retrofit roofing systems are engineered to adapt to the existing roof s structural support system whether constructed of steel concrete or wood.
In an un ventilated roof moist air is passed from the roof construction through the breather membrane out into a ventilated air space formed by counter battens.
Download the mcelroy metal retrofit roofing guide to learn more.