In October, the company said it had found that some of its plastic door linings were plastic and some weren’t.
The company said the plastic insulation it uses was “better than most manufacturers.”
The company also said it was taking steps to ensure the insulation it buys is of the highest quality and meets government safety standards.
The new materials would be manufactured by the company’s U.K. division and will be sold in Europe.
Norva said the new materials were made from recycled materials.