The British Woodworking Federation (BWF) sent out an update to its members after the government missed another deadline on the publication of Part L.
The government consulted on Part L changes last year and originally intended to introduce the amended Part L in April, but later changed this to a publication of the new standard in May, with introduction in the autumn.
BWF policy executive Matt Mahony said there were still no signs from the government despite fears that delays were adding further uncertainty to the construction industry, particularly for housebuilders and product manufacturers.
"Despite the fact that we have reached the beginning of June, there is yet to be any indication of the timing and nature of the response on Part L," he said.
"The lack of activity has come amid speculation that the delays owe much to disagreements within the coalition over how strong the new efficiency rules should be."
