The old house that my elderly mother lives in in California was recently found to have traces of asbestos from behind the popcorn ceiling of her living room. There is a 4" x 6" patch where the popcorn has come off. But there are no openings/holes in the ceiling. Taking out and replacing the ceiling would be a major job, that would require her to move out while the work is being done. Because of her frailty and dementia, we would rather not put her through such an unsettling experience. I've heard that an alternative would be to put wall board over the ceiling and then paint it as a temporary but long-term fix. Is the information re the wall board correct? If so, how much time and expense would it entail? Can any contractor do it or must they be certified to do asbestos work? We are looking at the ceilings of two 9X12 rooms. Thanks for any information or suggestions.