1. And would putting new plasterboard over the rigid insulation be OK? 2. The foam insulation is flammable and must be covered with plasterboard . 3. There is no need for a primer on plasterboard or plaster. 4. Also, the Blueboard is more water resistant then ordinary plasterboard . 5. Q . My finished-basement walls are covered with plasterboard . 6. Finishing under the stairs with plasterboard also will contain the odor. 7. Yellow insulation was visible through gaping holes in the plasterboard walls. 8. Knauf ( 2002 ), plasterboard cartel, 86 million euros. 9. The manufacturing of plasterboard began in this area in about 1880. 10. The interior walls are covered in plasterboard , which remains unfinished.