The underside of my cement washing machine was awkward to clean of leaves and other debris (see: http://www.instructables.com/id/Hand-powered-WASHING-MACHINE ). At first, I decided to block it in solidly with styrofoam and cement, but then decided to take a more minimalist approach, just creating a surface skin to enclose air. It was another chance to practice with the plastic window screen and grout technique I used previously to patch a broken section of privacy wall (see: http://www.instructables.com/id/Grout-and-Screen-Hole-Patching ) .
The shape in this project was more complicated, but as expected, the material adapted nicely to the task at hand.
The shape of the filled in area is highest in the back corner and slopes steeply toward either side to help leaves wash down to the base in front.
I'm sure that, even with their strength limitations, women and children would not have trouble working with this material. The grout is easy to mix in small batches, and is just brushed on with a house brush for the most part. The grout membrane is pretty strong, considering how thin it is.
The screen is just stuck down with grout to the existing structures. It's a quick and easy technique.
Step 1: Tools and Materials
Like cement, when stored in plastic buckets with lids, dry grout will last a long time in storage. Sanded grout, or "pega" as it is called here, is used to glue down tiles. It doesn't shrink, so is less prone to crack than is cement. Mix it with water to a thick cream consistency for brushing.
Plastic window screen comes in rolls. Cut it with scissors.
You need rubber gloves, a house brush and a mixing container. A little trowel is also sometimes useful. A wet sponge helps for cleaning up spots.