Roof Drain Insulation Requirements

Continuous insulation zones ashrae 90 1 ashrae 189 1 igcc ibc iecc 2004 2007 2010 2013 2016 2009 2011 2014 2012 2015 2009 2012 2015 0 25 1 15 20 2 15 20 25 3 15 20 25 4 15 20 302535 5 15 20 302535 6 15 20 3035 7 15 20 3540 25 8 20 3540 25 minimum r value non residential above roof deck. Basically 4 of insulation is required with the only exception at roof drains. Both 2012 iecc and 90 1 10 piping associated with service hot water systems to be insulated to a minimum of not less than 1 inch of insulation having a conductivity not exceeding 0 27 btu per inch h x ft2x f under certain circumstances.

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Roof drain insulation requirements.

An additional roof drain should be added for each 10 000 square foot area. At roof drains the 4 of insulation can taper down to 3 within the area of the drain sump. In metal stud walls the requirement for continuous insulation in addition to the insulation within the stud space is new. Tapered backwashes can also help reduce the insulation height at the roof edge.

All drain sumps are to be constructed out of manufactured taper insulation panels. Climate zone 1 2 3 4 5 6 7 8. A minimum requirement of inch per foot slope is required byncsbc. Insulation requirements in commercial buildings for mechanical and service hot water piping.

Browse product options or contact your local insulfoam rep to help you quickly pick the best products to simplify your building envelope needs and fit your project budget all with one supplier. Once the drainage system is determined the designer must ensure positive drainage by correctly positioning the roof drains. Hand cut taper sumps are not allowed. A good rule to follow is to provide two roof drains for a total roof area less than 10 000 square feet.

Minimum insulation r value requirements non residential above roof deck. Any water that does not drain must evaporate within 48 hours. There should be no ponding on the roof. Roof drains that are elevated above the roof deck must be supported with a treated wood nailer or some sort of structural element that will minimize.

The roof drain or gutter or drain piping or downspout leader size diameter other size constraints e g. For example in the u k. When roof drains are located a great distance away from a sloped roof edge more than 48 it can be more cost effective to use a tapered backwash. Iecc 2015 requirements by climate zone 3.

Designers specify compliance with bs en 12056 3 2000 that includes a calculation for the allowable capacity of the rainwater pipes. The building thermal envelope shall meet the requirements of tables c402 2 based on the climate zones.