Why are these top brokers bearish on the Boral (ASX:BLD) share price?

Shares in building and construction materials supplier Boral Limited (ASX: BLD) opened at $6.45 a piece to start the session on Tuesday.

That price marks a 13% decline from a previous closing high of $7.41 on 23 July and an almost 5% fall in the last week of trading.

Several brokers have…