Mounting Roof Top Unit On Existing Roof

Standing seam metal roofing offers a durable sustainable alternative to other roof types and can provide maintenance free service for five to 10 decades.

Mounting roof top unit on existing roof.

Installer s guide roof curb packaged rooftop units. Tenants frequently remodel commercial spaces for their current needs and in many cases add new air make up units exhaust fans and hvac units. Never attach roof ashing directly to a york rooftop unit. Excellent weather just a perfect early morning to replace a york dl10 10 ton pack.

And in this one sentence lie the benefits and the detriments we face in the roof curb business everyday. 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. You can t ask for a better job on a monday morning to start off the week. Renaud de saint ceran subject.

The primary function of the curb is to keep weather out while supporting flashing the equipment on it. Placing the unit on lumber which bears on a sloped roof causes the equipment to sit out of level and operate less efficiently. 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. There are three options regarding permitting of replacement roof mounted units.

Using improperly designed internal and external isolation springs can increase vibration. In the last month we were asked to evaluate two commercial spaces for new rooftop units. Often we are asked to evaluate an existing steel roof structure to determine if it can support new roof top units. Baycurb042a baycurb043a baycurb044a precedent roof curb acc svn43e en created date.

It may also migrate if not anchored. Prefabricated roof curbs have been in use since the roof has been utilized for something other than keeping weather out. 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.