This is not my experience. I bought a DC04 which, although not bought for this purpose, has been used entirely for cleaning up building work, often plastering, for 4 years, and has worked fine. With this sort of dust, some very fine dust which the cyclone can't extract ends up in the foam filter. It takes about a day, perhaps 4-5 canisters of plaster dust, before the thickness of plaster trapped in the foam filter works its way through to the other side of the foam. Even then, I've never had the Dyson clog/overheat/tripout.