English to French Tech/Engineering Architecture

All tough we are not designers, we have a feeling for architecture and take great care in acquiring the various aspects of your design to ensure its inherent qualities will not fade during the engineering process.

Je n'arrive pas à rendre cette phrase correcte en français. Ce qui me pose problème : "fade".... ternir, affaiblir la qualité du projet???

Toute proposition sera la bienvenue.