Make it step by step
- Step 01
Inspect for droppings, chemical residues or flaking coatings. Choose a clear spot away from dead overhead branches and paths.
- Step 02
Slope the tarp towards one low corner without pooling. Keep the corner above the container rather than submerged.
- Step 03
Let initial runoff bypass the storage container, then move it underneath. This removes some debris but does not disinfect water.
- Step 04
Cover and label after collection. Keep entirely separate from safe water supplies and avoid storage that allows mosquito breeding.
Check before use
No pooling or overflow, and the container is clearly distinct from drinking water.
Limits of this project
Rainwater can contain germs and chemicals. Ordinary tarps are not certified drinking-water catchments; boiling does not remove all chemicals.
Take down and restore
Dispose of leftovers as permitted and dry the tarp and container.
All lashings and racks here are for light objects, never people, climbing or rescue.
Further reading
References support relevant principles, not certification of these projects or their dimensions. These original practice designs and diagrams have not been field-tested by this website.
