diff --git a/hermesv3_gr/modules/grids/grid.py b/hermesv3_gr/modules/grids/grid.py
index 9263e64ff8c78d0db1737186a493fd87cf3401a9..2669dd199ad1070724cc477922983b26fd92f5bb 100644
--- a/hermesv3_gr/modules/grids/grid.py
+++ b/hermesv3_gr/modules/grids/grid.py
@@ -411,6 +411,7 @@ class Grid(object):
         if settings.rank == 0:
             if not os.path.exists(self.shapefile_path):
                 os.makedirs(self.shapefile_path)
+        settings.comm.Barrier()
         if full_grid:
             self.shapefile_path = os.path.join(self.shapefile_path, 'grid_shapefile.shp')
         else:
@@ -531,6 +532,7 @@ class Grid(object):
             settings.write_log('\t\tGrid shapefile already done. Lets try to read it.', level=3)
             gdf = gpd.read_file(self.shapefile_path)
 
+        settings.comm.Barrier()
         settings.write_time('Grid', 'to_shapefile', timeit.default_timer() - st_time, level=1)
 
         return gdf