Design fundamentals - The Hempcrete Topic: Designing and Building with Hemp-lime - page 506

A drip detail incorporated into the bottom of the render
stops water from running down the plinth.
The inclusion of drip details in the render, for example above windows and at the bottom
of the rendered wall where it meets the top of the plinth, is sensible practice. If natural drip
details are to be used at the plinth (see Figure 14(b), page 246 ) these will need to be fixed
in place before the hempcrete is placed.
At window or door openings, external render should be properly sealed to the frames, using
either appropriate frame seal render beads or render stop beads with a suitable mastic seal
(see Chapter 18, page 245 ) . As lime renders tend to shrink back a little on drying, it is im-
portant to use a bead with a glass-fibre mesh to be incorporated into the render. A more
natural alternative is to render up to the door or window frame and then place a hardwood
corner bead to cover the join, held in place with a line of burnt sand mastic down each