I went old school with my latest vehicle purchase.
1984 VW Vanagon. Full 4x8 sheets of plywood or sheet stock fit right inside since I have the plain Passenger Vanagon model and not a Camper/Westfalia. Haven’t measured for Metric Baltic Birch sheets, the 5 foot by 5 foot ones, those would either fit inside, or end up on roof bars, but would make it home either way.... [smile]
This is the first time in years that I could do this. I’ve done the hourly rental route too from Home Depot or Menards.
All my first, original haulers in years past were either passenger cars that held what fitted out an open window, or gently tied to the roof with the exception of my first vehicle, a 1968 VW Camper. It held what would fit around the interior cabinets.Not that satisfactory at times, but it worked. [embarassed]
When I started buy SUVs , I had roof gutters to finally attach bars to, so plywood and sheet stock went on way more securely than previous methods, but still limited to not too many sheets on the roof for safety. That was a game changer, as long as it didn’t rain on the way home.... [wink]