I did no work on it at all. I just leaned them against the genny leaving the muffler side open.Decided I would give myself a break and build a floor mat cage for myself.
Do you have the smooth side in or out? It would seem that the crinkled side would be better at directing sound in different directions but the smooth side would absorb rainwater better.
It appears your "house" has a greater than 45 degree peak.Did you trim the interconnectors from one side of the end wall?
Any re-inforcements? What did you do to allow ventilation?
Let me know how yours turns out!