Monday, January 21, 2013
Tatched Roof 3
I finished coating the roof. The final mixture was one part cement to two parts of aggregate, plus asphalt emulsion. So each batch included four parts sand, two of cellulose insulation, three of cement. It was easiest, after the dry ingredients tumbled awhile in the mixer, to rake some into a large plastic bowl, add water, and mix by hand (rather than in a bucket with the drill), then add the asphalt emulsion. I would just scoop some asphalt emulsion -- maybe two handfuls --out of the bucket into the bowl of damp mix and knead it until it was evenly distributed. I daubed the stuff on. Thin coats work best. It was pleasant to work with. I used a broken CD as a tool to created the thatched look. The crete lightens as it cures.