I remember posting this in a previous laminate thread and it caused controvacy!!!  but I laid my flooring over carpet, not thick but the crappy contract thin knee burning stuff that came with the house. Did it in 3 rooms here and the same at my previous place with no issues, a lot of positives though like added insulation and quieter but not at all springy
	
		
			
		
		
	
				
			 
	 
  
 
		

 
 
		
 
 
		