This paper presents an approach to enhance semantic interoperability between semantic resources for the construction sector. It extends the approach developed by the FUNSIEC project through a set of propositions intended to increase the quantity and the quality of semantic mappings. The evaluation of the semantic mappings targets two directions, i.e. to assess the quality of the mappings using fuzzy logic techniques and to calculate how much a specific mapping is appropriate to a user context. Conclusions and further work are also discussed here.