parget                  any of various materials for covering walls,
                        esp. a mixture of hair, lime, and cow dung for
                        plastering chimney flues; gypsum; [wtf?]
pargeting               a lining or mortar; ornamental plasterwork.
parging                 a thin layer of plaster or mortar to seal
                        rough masonry against moisture or for smoothness.
snecked                 built of uncoursed, partially-squared rubble.
                        (compare |ashlar|)
sneck harling           harling of rubble masonry that leaves the
                        larger stones exposed.
harl                    (Scot.) v.t. to drag something; to troll for (fish); 
                        to plaster (an exterior) with roughcast; 
                        v.i. to move draggingly; to sulk;
                        n. the act of dragging; roughcast; a small amount.
roughcast               mortar and gravel, mixed and thrown against a wall 
                        as an exterior finish.
pebble dash             a finish in which the wall is mortared, and
                        pebbles are thrown at the wet mortar and
                        pressed in.
depeter                 now the pebbles are pressed in with a board,
                        without being thrown.
Gunite                  a mixture of cement and sand, sprayed on supports.