It's possible to lay carpet over hardwood, but there are a few things you need to take into account first. If the hardwood is in good condition, then you'll just need to make sure that it's properly sanded and sealed before laying down the carpet. This will help protect the hardwood from any damage that might be caused by the carpet. However, if the hardwood is in poor condition or has already been damaged, then it's best to avoid putting carpet over it altogether.