Ladder 65 was alerted around 1230 hours to assist Berks Station 58 on a building fire at Poor Richards Tavern off Route 100.  Chief 58 arrived and found smoke showing from a 3rd floor room above the Tavern. This added 65 full company to the response.  Berks Tanker 58 arrived and advanced an attack line to the 3rd floor for suppression.  Ladder 65 arrived and was given orders to ladder side A (alpha) and ventilate the roof.  Engine 38 arrived and laid a supply line to Side C (charlie).  65 crews ventilated the roof and assisted with overhaul. Squad 71 was set up on side A (alpha) for RIT duties.  Engine 65 arrived and assisted with overhaul duties. The fire was contained within 30 minutes and placed under control shortly there after.  Multiple companies were called in to assist due to the extreme heat.  Berks 505 provided EMS services and had a Rehab area set up on side B (bravo).  One firefighter was taken to the hospital for heat exhaustion.  Canteen 41 from Montco was called and set up near the command post.  Crews worked for about 2 hours with overhaul of the building and were returned to service. Traffic 65 and Fire Police directed traffic along busy Route 100.