Secure the garbage bags with duct tape.
Use plastic sheet on raft.
Food water edit edit source empty cup 4 empty bottle 6 simple purifier 4 advanced purifier 6 cooking pot 6 sprinkler 12 scarecrow 3.
This is a good choice as the cost is minimal and the holes can be easily made or enlarged to accommodate your plants.
Using 4 plastic barrels building a fram around them would make a raft that will maybe out last you.
Place the bundles of plastic bottles in the elongated garbage bags.
Stretch out two sheets of netting.
Form two sausage shaped floaters.
Not to mention that using 4 plastic barrels would be tons more stable.
And then laying of reinforcement is done on spacers over the foundation bed.
This is something that you could use on a yearly basis it could be anchored somewhere to swim from or it can be used to float down the river or acoss a lake.
Plastic is used for 18 different items including the raft foundation.
Plastic can be found floating in the ocean in barrels on vacated rafts and in loot boxes.
After this a waterproofing layer is installed if it is a basement.
Then a waterproof plastic sheet is laid over the earth and a thin layer of plain cement concrete pcc is poured just to create a perfectly flat and level base for the foundation.
You can purchase huge sheets of these and cut them to fit the size of your tank or tanks.
Today most experts feel very strongly that engineered films designed specifically for use as vapor retarders should be used as vapor retarders.