In building material declarations and similar documents, you can find out that the "technical lifespan" of, for example, asfaboard is 60 years. That sounds quite long, but does it mean you should expect the asfaboard to start falling apart after 60 years? I had hoped that the house I'm building would last a bit longer than that, and it doesn't seem too fun to start tearing into walls, floors, and ceilings (even if it's probably someone else who will have to do it 
).
How long can you really expect materials like asfaboard, oil-hardened board, plywood, particle board, etc., to last? Is there any institution that tests and knows?
).How long can you really expect materials like asfaboard, oil-hardened board, plywood, particle board, etc., to last? Is there any institution that tests and knows?
I basically believe it depends solely on the environment where the asfaboard is situated.
I tore down the asfaboard that was used as a subfloor panel on our house last summer, it was then 40 years old and seemed to be in like-new condition. Hard to believe that another 20 years would make much of a difference.
I tore down the asfaboard that was used as a subfloor panel on our house last summer, it was then 40 years old and seemed to be in like-new condition. Hard to believe that another 20 years would make much of a difference.
Yes, it must make a very big difference. But I still wonder what happens when the board is under somewhat ideal conditions. It is compressed with some kind of glue - does the glue hold 'forever' or does it naturally break down? Does anyone know?