Hanok recently is getting attention by Korean wave and the eco-friendly construction. However it has the not a few weak points to live in modern and been recognized as a big problem such as efficiency problem, hight cost to construct and maintenance difficulty to be solved.
The solution are the modularity and weight lightening of Hanok but the roof is one of the most difficult parts of it, the roof represents the beauty of Hanok with graceful catenary line, filling timber and soil should be improved to the modern materials and construction methods as an alternative. As the result, this study conceives the improvement figuring out the problem and the case study review as well as suggests the valuation of feasible plan and the potential for modularity by application of the actual field. The roof is consisted of the framework as the constructable role on the upper part of roof board, the insulation and air layer as well as additional roof board should be installed to make easy the roof construction and attach the vapor permeability water proofed paper. Accordingly, Additional rafter, Diaphragm board and Panel can be used as the alternatives. and this reports the possibility of workability, modularity applied in the field.
The results of this study are expected to improve the efficiency of the waterproofing of roofs, insulation, maintenance, etc and so on contribute to the pervasiveness of the hanok.

Abstract
 1. Instruction
 2. Case study and development plan
 3. Conception of a dry roof system
 4. Dry roof system, field application
 5. Closing remarks
 References

• Kim Min Joo(Interdisciplinary Program of Cultural Properties Graduate School Chonnam National University)
• Cheon Deuk Youm(School of Architecture Chonnam National University)
• Lee Bang Yeon(School of Architecture Chonnam National University)