HOME SERVICES INSERTS CARLSON'S F.A.Q. SERVICE AREA (414) 774-6955 TUCK POINTING CONCRETE CAPS RELINING CLEANING RAIN CAPS SCAFFOLDING WATER PROOFING DAMPER FLUE CAP FLASHING REBUILDING RAIN CAPS You need a chimney cap to keep the rain from damaging your chimney flue and to keep squirrels, raccoons, and bats from taking up residence.