I sprayed the corrugated cardboard pieces with aluminum paint and then I assembled the roof. I'm not using the gingerbread or the finials, so I lopped off the curvy rounded thingies at the gable peaks. I had to perform minor surgery on the divider wall.

Then I glued each currogated cardboard piece onto its roof section.

I had gapping at the ridgelines, so I made ridgecaps from strips of heavy-duty aluminum foil.

I touched up the downstairs windowsills with a light coat of paint. I cut the tabs off the interior roof supports to glue over the holes in the gable peaks where finials would have gone.

Next will be to see if the porch finally fits and then start in on the furniture. I was not happy with the Haunted House's couch & armchair ;)