The paper presents a comparative analysis of the cost of roof truss production for the gable hip roofs for the truss and rafter construction. There have been discussed the benefits of application of modern roof beams for the realization of singlefamily housing. The analysis showed that for gable roofs we can achieve very significant savings in the implementation of the truss roof structure. Slightly smaller benefit hes been obtained for the hip roofs, but it has been shown that modern truss rafter is definitely favourable to roofing of houses.