Roof Drain Insulation Requirements

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Roof drain insulation requirements.

The roof drain or gutter or drain piping or downspout leader size diameter other size constraints e g. A good rule to follow is to provide two roof drains for a total roof area less than 10 000 square feet. 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. A minimum requirement of inch per foot slope is required byncsbc.

Insulation requirements in commercial buildings for mechanical and service hot water piping. 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. The building thermal envelope shall meet the requirements of tables c402 2 based on the climate zones. An additional roof drain should be added for each 10 000 square foot area.

Climate zone 1 2 3 4 5 6 7 8. In metal stud walls the requirement for continuous insulation in addition to the insulation within the stud space is new. There should be no ponding on the roof. At roof drains the 4 of insulation can taper down to 3 within the area of the drain sump.

Basically 4 of insulation is required with the only exception at roof drains. R 20ci r 25ci r 25ci r 30ci r 30ci r 30ci r 35ci r 35ci. Iecc 2015 requirements by climate zone 3. All drain sumps are to be constructed out of manufactured taper insulation panels.

For example in the u k. Tapered backwashes can also help reduce the insulation height at the roof edge. Hand cut taper sumps are not allowed. Once the drainage system is determined the designer must ensure positive drainage by correctly positioning the roof drains.

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. Any water that does not drain must evaporate within 48 hours.