Since conventional venting is probably not a good option for your roof the needle points toward the spray foam option you noted.
Vent a metal roof or not.
A home s ventilation system consists of everything from roof vents to the best attic fans without the right roofing and attic ventilation system your home can become uncomfortable and cost more to cool or heat.
Take for example ridge vents.
A metal roof typically does not increase nor decrease the need for ventilation.
One of the big reasons homeowners choose metal roofing is for the uninterrupted run of metal from the top of the roof to the gutter which reduces the risk of leaks.
In many cases for existing homes this is the easier way to go.
The idea of roof vents existed for hundreds of years with natural vents employed in chinese buildings during the tang dynasty natural ventilation ducts in the buddhist monks caves and wind catchers incorporated in arabian architecture.
Air must be able enter through the soffit vent and exit through a ridge or gable end vent.
Plus roofing and attic ventilation systems can protect homes from the expensive roof and structural damage caused by trapped heat ice dams moisture and mold.
Traditional roofers use passive ridge vents which are ineffective.
We do need to mention though one very rare scenario we have seen just a couple of times over our 35 years.
However there are a few simple tips that will help make the process a little easier and also ensure that the vents are placed to allow the maximum benefit.
Ventilation that meets code requirements is adequate for any type of roofing material including metal.
While hardly anybody agrees on the best roof ventilation system everybody agrees some roof vents do hardly any good at all.
The building codes and building science for.
Proper air movement from soffit vent to ridge vent is not always possible.
The good and proper ventilation is the key to lowering home energy costs preventing attic mold.
Vent roofs with steeples towers or cupolas can be found in different buildings from barns to cathedrals.
The majority of roofing experts agree that ridge vents are the most effective and cost effective roof vents available.
Metal roof ridge vent one of the most important components of a residential roof is the ventilation system.
Installing some type of ventilation mechanism on a metal roof is not a lot different from the addition of vents to any type of roof.
Metal roofing works well with this because the metal is unaffected by heat not being able to pass through it and enter the attic.
I have roof vents so i have roof ventilation.
The other option of course is a vented attic which requires an equal balance of intake and exhaust vents.
