Mounting Roof Top Unit On Existing Roof

If anchored holes are punched in the roof.

Mounting roof top unit on existing roof. In the last month we were asked to evaluate two commercial spaces for new rooftop units. And in this one sentence lie the benefits and the detriments we face in the roof curb business everyday. Never attach roof ashing directly to a york rooftop unit. York does not recommend vibration isolation be pro vided on both the fan skid inside the unit and the curb outside the unit without credible testing results.

Standing seam metal roofing offers a durable sustainable alternative to other roof types and can provide maintenance free service for five to 10 decades. Prefabricated roof curbs have been in use since the roof has been utilized for something other than keeping weather out. Using improperly designed internal and external isolation springs can increase vibration. Baycurb042a baycurb043a baycurb044a precedent roof curb acc svn43e en created date.

There are three options regarding permitting of replacement roof mounted units. Going to be doing a full install. Often we are asked to evaluate an existing steel roof structure to determine if it can support new roof top units. Adding new roof top units to existing roof msquared48 structural 21 feb 13 16 36 i like to convince architects to put any rooftop units on the ground wherever possible solves a lot of problems if the space is available and the roof is weak.

Sadly this exceptional lifespan often is sabotaged with the mounting of essential rooftop equipment and ancillary mechanicals. Units shall be mounted on curbs raised a minimum of 8 inches 203 mm above the roof surface or where roofing materials extend beneath the unit on raised equipment supports providing a minimum clearance height in accordance with table 1510 10. The usual method is to mount the unit on wood blocking to raise it above the plane of the panel ribs and give it a surface to bear upon. It may also migrate if not anchored.

Placing the unit on lumber which bears on a sloped roof causes the equipment to sit out of level and operate less efficiently. You can t ask for a better job on a monday morning to start off the week. Tenants frequently remodel commercial spaces for their current needs and in many cases add new air make up units exhaust fans and hvac units. The primary function of the curb is to keep weather out while supporting flashing the equipment on it.