removal of ventilation to ceiling space
removal of ventilation to ceiling space
(OP)
Should it pose a problem to remove the ventilators on the top of a commercial building. We have a 40 year old commercial building that will soon get a new roof (changing from a built-up roof system to a simgle ply membrane roofing system). The roofing contractor suggested removing the existing turbine "whirlybird" ventilators to save on flashing cost and leak potentials. He felt like they were not needed and he noted they are not on most similar buildings in shopping centers.
The building has a suspended ceiling (on track grid) with 2' x 4' ceiling tile panels that have about 1.5" insulation. Above those, all the HVAC ducts, sprinklers, and pipes are run. Then the roof is metal deck with lightweiht concrete with the built-up roofing on top of that.
Thanks for any advise or recommendations to other references.
The building has a suspended ceiling (on track grid) with 2' x 4' ceiling tile panels that have about 1.5" insulation. Above those, all the HVAC ducts, sprinklers, and pipes are run. Then the roof is metal deck with lightweiht concrete with the built-up roofing on top of that.
Thanks for any advise or recommendations to other references.





RE: removal of ventilation to ceiling space
RE: removal of ventilation to ceiling space
RE: removal of ventilation to ceiling space
Find out why they are there and don't guess, hire someone who knows.
RE: removal of ventilation to ceiling space
Morevoer, roof fan installation has very little or no leak potential, any roofing contractor can seal edges of roof frames with typical application detail.
Most of roof tightness problems I have seen come from individual stack vents, the worst being vents with small diameter, though new syntetic, often polyethilene based, ply membranes made roof sealing much easier.