a high gloss synthetic. and why the name delta there's more than one reason. it's of course the greek sign for all the greek alphabet for the triangle but it's also flawed from the architect with me and my interest in aviation so it's adult off the delta airlines. now everybody's calling it the delta house because that because of the shape and because they know me and my story so it's nice it gives the house a little bit more of an attitude. interest in flight is reflected not only by name the house after an american airline company but also in the very special shape of one of the homes two terraces. rectangular is here so we needed a triangle triangle shape to make it fit with