Supply conditions in the US lumber market have shifted rapidly as prices have normalized, with 49% of dealers saying they had excess inventory in July, according to a survey by Bloomberg.  Some dealers were facing less severe inventory build-ups: 32% reported "normal" conditions and 19% reported "slightly low" inventory last month. No surveyed producers reported "very tight" inventory in July. By contrast, in June, 19% reported very tight inventory - and in April, 40% did.  The survey, conducted by John Burns Real Estate Consulting, took the temperature of lumber dealers and manufacturers doing over $25 billion ...