Darren just an off the wall question, (i went back and looked at the building again). Is there no way you can use the space above the trusses.
What i mean by that is this. In my shop instead of using blown in insulation and a ceiling, i put my insulation R22 roxul between the top trusses and then covered it with the usual poly for a vapor barrier and then sheetrock. What this did in my case was give me a cathedral type of ceiling and i could use the space. Now when i look at the height of the building and i think of all that space being lost but still insulated lower down i am wondering??? Because when i see you partitioning the place then i am thinking mezzanine storage could be placed above some of the partitioned areas and you know what its like we always after storage even for houshold Christmas lights and other "stuff".
If you insulate at roof height then that mezzanine storage space could be heated as part of the shop.
I know you have to consider loads and you have to cater for the snow loads but could you not do a little reinforcing like lapping of the trusses in places to cater for the additional load if any.
I placed that polystyrene sheet that goes against the roof and keeps air flowing from the sofit thru to the vents before i put the insulation in.
Dunno just thinking aloud when i see how quickly the space gets gobbled up for various uses.
Dang i guess its never enough. The layout tool is cool. I dont have particular preferences related to your current layout but i do think moving the office space makes a big difference.
Does seem to me that the back end where the gravel is, is getting a disproportionate share of the overall building size for what it is going to be used for and the amount of time in each year. I mean grass does not get cut in winter right. So a huge chunck of garden stuff gets a huge chunck of the shop space because of gravel for only what 8 months of the year.
