Builders install tapered roof insulation on a flat roof adding a positive slope that will improve your roof s drainage while still having the benefits of a flat roof this slight slope can make it easier to drain excess water and debris.
Tapered roof insulation sizes.
Standard material is johns manville enrgy 3 tapered and flat polyisocyanurate roof insulation.
A flat polyiso underlayment board often referred to as flat fill is used beneath continuing repeating tapered panels.
That thickness has to be accounted for in the wood nailers when developing the roof edge detail as well as in wall flashing heights and curbs.
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Designed to provide positive drainage of water.
Properly installed tapered iso 95 gl insulation can extend the life of the roof assembly by eliminating problems associated with ponded water.
Firestone iso 95 gl tapered insulation.
The roof consists of pre designed pieces of expanded polystyrene having a slope of 1 8 3 16 or 1 4 per foot as required.
Taper is not recommended for use on level roof decks.
Insulation tapered polyiso foam roof insulation 3 5 tapered polyiso insulation provides a logical and economical answer for roofs that do not permit adequate positive drainage like low slope roofs.
Thermapink tapered roof insulation has been tested over steel roof decks without a thermal barrier in accordance with ul standard 1256 and is listed for use direct to deck in accordance with ul roof deck construction 457.
Tapered polyiso panels are manufactured in standard 4 by 4 sizes with a minimum thickness of at its low edge and maximum thickness of 4 for a single board.
When correctly installed tapered insulation helps eliminate problems due to ponding water and can extend the longevity of your low slope roofing.
C402 2 roof assembly exception 2 allows a 1 inch insulation thickness variation 4 0.
Tapered roof layout tapered roof insulation.
Thickness to be 4 2 at the low point or 5 2 4 away from the drain on a per foot tapered system.
It is readily available in the two most popular and efficient tapers 1 8 3 18 mm per foot 305 mm 1 and 1 4 6 35 mm per foot 3 18 mm 2.
Two way and four way systems.
The added thickness to produce slope to drain is a positive factor in today s energy conscious society.
The roof drain with a tapered insulation system sloped at inch per foot and 2 inch minimum at the roof drain will be 14 inches thick at the roof edge.
Firestone tapered iso 95 gl polyiso insulation provides an efective and economical solution.
If the tapered maximum thickness exceeds that permitted by 457 a thermal barrier may be required.
