Performance imperatives for high r value roof retrofit using insulating sheathing above the roof deck plus cavity insulation in roof framing.
Retrofit deck on sloped roof.
The existing roof s physical footprint framing system and other rooftop conditions will most likely control the new roof s geometry.
Cold storage freezer facilities and swimming pools constitute a special condition.
Single ply roofing over a metal roof also called single ply retro fit can be completed with tpo pvc or epdm.
This is where a single ply membrane retrofit roof system comes into place.
Single ply roof manufacturers may also have minimum requirements for roof deck properties depending on how the roof.
The roofslope auxiliary sloping compound provides a quick and easy way to fill in low spots on flat roofs and achieve positive slope to aid in proper drainage.
Roof decks that do not provide adequate fastener pullout resistance 8.
Structural concrete roof decks.
In some cases another metal roof can be installed over and existing one.
To 12 ga steel framing installed over the existing roof s framing members to create a sloped plane.
The mbci nuroof retrofit roof system utilizes light gauge 16 ga.
Effective water control is essential to the performance of any attic roof system.
2010 standard for steel roof deck has a total load deflection limit for steel roof deck at l 120 whereas ibc table 1604 3 footnote a stipulates a total load deflection limit of l 60 for structural metal roofing figure 6.
A sloped retrofit metal roof incrementally extends the life expectancy of the building reducing roof maintenance costs.
The following measures are necessary to ensure high levels of performance for this roof retrofit strategy.
The slope could be increased to improve solar panel performance says david stermer director of engineering at metal sales manufacturing corp louisville ky also the slope could be increased to improve the aesthetics of the roof by adding hips valleys and color.
For the purposes of this article we will only be discussing single ply retro fits.