| If you are having a vinyl liner pool installed - then the pool installers should be doing this =)
To answer your question, yes, you want to complete al work near the edge of a pool (coping included) before you hang the liner. Technically you could do the brick work after the liner and water are in the pool, but I would not recommend it.
How terrible would it be to knock a brick or sharp object like a screwdriver into the pool and puncture your liner. That would be terrible. Your liner is the weakest link of your pool so you need to treat it like a baby if you are ever going to make it through the 30 year pro-rated warranty that good manufacturers are giving now on vinyl liners.
Being that I am a pool professional, there are many occasions where I need to work in close proximity to an unprotected liner with all sorts of menacing tools and materials. Bricks are pretty much the worst. If you drop one in, you have a hole in your liner and a dent in your soft floor. Then for the next thirty years you get to look at an underwater patch that no one else can see - but you know its there.
Whether vinyl liners or gunite plaster finish, I always do it last to make sure that the finished product is as good as it can possibly be.
I hope this information is helpful.
Steve Goodale
Serendipity Pools & Artificial Rock
Vancouver, BC
604-421-8429
1-888-267-0802 | 
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