A key building industry association doubts recommendations aimed at increasing competition will dramatically cut costs. The Commerce Commission's confirmed competition in the sector's not working as well as it could be. In a report it's recommended expanding the range of product certification schemes, making competition a key objective of building regulation, and discouraging suppliers from paying high volume customers rebates that are harmful to competition. The Commission confirmed it's already investigating discounts offered by Fletcher Building's GIB board company. And Fletcher's swiftly followed up with a statement saying it's scrapping the controversial rebates. Master Builders chief executive David Kelly talks to Lisa Owen. [embed] https://players.brightcove.net/6093072280001/default_default/index.html?videoId=6316643014112