Raising the roof

[Dr Stan]

I'm kicking myself as I knew when I built my 24 X 48 shop it should have 12ft walls, but instead made them 8ft. Trying to save a buck.

When I first built my shop with the 8ft walls I installed the trusses without a ceiling so I could use them for storage. However I insulated the underside of the roof with fiberglass batting and in turn covered them with ceiling tile. Being the safety nazi I am I was concerned with welding sparks reaching the kraft paper and igniting. I'm removing said tiles and they will not go back up. I'm still somewhat concerned with welding sparks reaching the ceiling, but realize the chance is quite low.

Is there something one could recommend to protect the underside of the insulation? I researched Tyvek and discovered it has a class 1 fire rating just like typical clothing. They also have a fire retardant version which I assume is much more expensive.

Am I over thinking this? Should I install a ceiling (I'd really rather not) and store the material on the added 4ft height of the walls? Should I cover the underside of the insulation with light weight fire resistant canvas? Just cover the area above my welding table?

I'm also seriously considering buying/building a large hood with forced ventilation to install above my welding bench. Would this effectively eliminate my welding spark/fire issue?

Or am I still over thinking/being a super safety nazi?

Thanks in advance.