The exterior wall like the interior also plays a significant role in heat transfer, thus proper insulation is needed. Exterior Insulation and Finish System (EIFS) as an exterior wall cladding system is one of the most effective ways of insulating the exterior walls. In this method, XPS insulation boards are screwed and installed using special rawlplugs and adhesives on the wall substrate which can be made of concrete slabs or clay blocks. Then the first base coat is applied with the fiberglass mesh as a reinforcing agent. Finally the final coat as desired such as decorative paint, bricks, stone tiles etc. is applied. EIFS system with its low weight will not only insulate the exterior walls but also lowers the weight of the whole structure.