Bamboo and Exotic Wood Floors - Capillary suction in basement walls

My husband and I are about to be brave and finish our basement. We are going to be DIY ing it. I am an interior designer and have done some basic construction myself. In doing research on the best way to finish a basement I have come across mention of Capillary suction in basement(concrete block) walls.How would I know if I have this and how would one correct it before applying rigid foam insillation?
Hope somebody out there knows!!!!!Thanks

All concrete absorbs water to some extent. The idea is to stop water outside the wall, before it gets to it.

6mill. poly is used under the slab, before the pour. Tape a 1' square piece of foil down on the slab, at all perimeter of foil. Check in 2 days, wet, prob. no vapor barrier under slab.

The rigid foam board, 1" thick is noted here: BSD-012: Moisture Control for New Residential Buildings — (http://www.buildingscience.com/documents/digests/bsd-012-moisture-control-for-new-residential-buildings?full_view=1)

Also: Energy Savers: Vapor Barriers or Vapor Diffusion Retarders (http://apps1.eere.energy.gov/consumer/your_home/insulation_airsealing/index.cfm/mytopic=11810)

Just type in topic in search box. Be safe, G