The CLA today (30 September) said its members would lose out over the European Commission's intervention in the UK's renewables policy.
The Association has spent 10 years lobbying for a long-term sustainable incentive for renewable heat and said it is disappointed to be presented with a last-minute delay to the Renewable Heat Incentive (RHI).
CLA President William Worsley said: "Many CLA members have been gearing up to launch projects on 30 September, while others have already taken the plunge and will face cash flow problems as a direct result of the Commission's intervention.
"The announcement for RHI funding was made in the Comprehensive Spending Review last October so the UK Government should have ironed out the wrinkles well in advance of the launch date."
Mr Worsley added: "The CLA welcomed the proposed RHI rates which we see as realistic in face of the rising costs of woodfuel in local markets. However, we fail to see how the bureaucrats in Brussels have a better idea of the real costs of installing large-scale renewable heat systems than our own Government."