Roof Drain Insulation Requirements

Hand cut taper sumps are not allowed.

Roof drain insulation requirements.

A minimum requirement of inch per foot slope is required byncsbc. Tapered backwashes can also help reduce the insulation height at the roof edge. The building thermal envelope shall meet the requirements of tables c402 2 based on the climate zones. In metal stud walls the requirement for continuous insulation in addition to the insulation within the stud space is new.

Once the drainage system is determined the designer must ensure positive drainage by correctly positioning the roof drains. A good rule to follow is to provide two roof drains for a total roof area less than 10 000 square feet. 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.

An additional roof drain should be added for each 10 000 square foot area. Climate zone 1 2 3 4 5 6 7 8. 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 roof drain or gutter or drain piping or downspout leader size diameter other size constraints e g.

Any water that does not drain must evaporate within 48 hours. Insulation requirements in commercial buildings for mechanical and service hot water piping. 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. Designers specify compliance with bs en 12056 3 2000 that includes a calculation for the allowable capacity of the rainwater pipes.

Iecc 2015 requirements by climate zone 3. 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. All drain sumps are to be constructed out of manufactured taper insulation panels. Minimum insulation r value requirements non residential above roof deck.

At roof drains the 4 of insulation can taper down to 3 within the area of the drain sump. For example in the u k.