Originally Posted by Chevaux
Re age of the barn: If it is structurally sound, it will last you for your lifetime.
Re concrete cracks: If you 'water proof' the cracks, then yes the urine wouldn't run into it. However, I think the cracks originally started because of the ground freezing and thawing which in turn causes the ground to shrink and swell which in turn forces the concrete to shift (which is rigid and not flexible) and thus started the cracking -- that is a reality in Canadian winters.
Even with the concrete cracks? The guy who built the barn passed away a long time ago but he sure did a good job on the barn.
Would filling in the cracks stop the concrete from coming apart at the cracks?