Mold needs 3 things to grow.
Growing in attic.
A sealed room is essential for the pest problems you will have in an attic too.
Also notice the condensation stains at the shingle nail more evidence of a history of attic moisture which was a factor in this mold growth.
When that happens it can become an issue keeping a safe gap between your canopy and lights.
Try a bay6 loft grow tent or budbox roof tent they re the perfect fit.
Related to 3 above this practice can pump warm moist air into the attic where it can be trapped and begin the cycle of mold growth.
Plywood or sheetrock just seal it with duct tape.
You can use a standard flat roof tent but you ll lose some height.
The presence of mold inside your home even if it s in an unused place such as the attic can cause.
Moisture food and warmth.
Nobody else is going to go in your attic but you.
Attic roofs are sloped to maximise height pick a tent that also has a sloped roof.
If you eliminate just one of these elements mold will starve and die.
Dryer vents plumbing vents kitchen or bathroom fans vented into the attic.
Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored.
Your grow room is going to be bright and attics have less places for light to leak out and alert neighbors.
Some type of insulation would be very benefitial if your have the time money inclination.
It s not included on a tour of the house and isn t visible to neighbors.
While five feet might seem tall enough for an attic you ll probably want a reservoir to put your plants on so that water and growing mediums don t spill out onto the attic floor bad news for the.
Attic grows are tricky.
I would suggest you build a room inside the attic sealed.
On attic mold visible on pine tongue and groove roof sheathing near the building eaves.