Yet another leak question *sigh*
water will go through brick. Try the easy things first. Check caulking on all windows and doors. If needed caulk with one part urethane caulk. SIKA, sonneborne and tremco are three good ones. Next seal the brick. Use a siloxane sealer. Alcohol based 20% solution. Follow all manufacturers guidelines.
Hope this helps.
Look for a construction specialties store in your area. AH Harris is one I know that is in New York.
Siloxane can be sprayed with pump up garden sprayer. It does have some cautions to follow and a respirator is a must.
Any constructions specialties company that provides concrete accesories can get you the product and info.