The best way is to make your The best way is to make your cupboards/boxes out of timbre frame, covered with plywood. Then just screw the timbre frame to the wooden ceiling of your van.
You can also use L shape metal brackets for extra strength.
Do you want to attach them to Do you want to attach them to the inside of the van, on the ceiling? What sort of boxes are they, plastic? What sort of roof lining do you have, ply wood?
The best way is to make your
The best way is to make your cupboards/boxes out of timbre frame, covered with plywood. Then just screw the timbre frame to the wooden ceiling of your van.
You can also use L shape metal brackets for extra strength.
You can see the cupboard I built in this picture. Move to the next pictures to see it screwed to the ceiling
https://www.campervanlife.com/galleries/1/3156/3182
Do you want to attach them to
Do you want to attach them to the inside of the van, on the ceiling?
What sort of boxes are they, plastic?
What sort of roof lining do you have, ply wood?
storage
yes on the roof like on yours, made from timber on a ply wood or the metal shell.