I've never done that- but I think it would slow the rate of heat flow through the ceiling, and hopefully reduce the upper tenant's need to open the window.If you have dropped ceilings, maybe some fiberglass insulation wouldn't be too hard to install.

Monthly Expenses = $2800 Per Month: Current Management Team = $1000.00Insurance = $224.00Real Estate Taxes = $92.00Fiber Optic High Speed Internet = $89.00Cable TV = $52.00Trash Dumpster = $55.00Sewer / Water = $186.00Natural Gas (average) = $142.00Electric = $327.00Housekeeping = $270.00Ongoing supplies = $230.00Maintenance = $133.00Total Renovation The renovation started in 2011 and was completed 2016 with entire complex being gutted to the studs, then completely rebuilt fully furnished inside and out to new standards, as follows: 26 gauge top of the line triple epoxy coated metal roof26 gauge top of the line triple epoxy coated awning and patio coverSingle hung gas filled energy efficient EZ clean vinyl tip-out windows4 new natural gas water heatersAll new plumbing throughout entire complex/buildingOnly #1 Grade Premium lumber was used throughout entire renovationQuality Price Pfister plumbing fixtures and lifetime parts180 feet of new 4 inch sewer line from the building to the street tapNew premium exterior fiberglass dimensional Colonial style entry door with new door jams, aluminum thresholds, all new lock sets and peep holesCustom picture framed windows with decorative edging and exterior door trim to matchCommercial toilets: all new PEX plumbing, shut off valves, bullets, supply lines, hose bibs, angle stopsNew attic and wall insulation with vapor barrierUpgraded electrical, HE lighting, new fixtures, switches, outlets, breakers, energy efficient lighting, vapor lights, rope lighting and HE flood lightsCustom artistic signage (3) built by Management TeamNew drywall, texture and highest quality Valspar paint throughoutAll exterior wood was hand primed and hand paintedNew vinyl fencing for corner lotPremium Quality pillow top mattressesNew hand textured walls (office), ceiling and covered entryNew concrete sidewalks, kitchens, baths, showers stalls, toilets, vanities, cabinents, counter tops, sinks, refrigerators, microwaves, deep freezers, dryers, A/C units, flat screen TVsAll work has been documents and permitted

Monthly Expenses = $2800 Per Month: Current Management Team = $1000.00Insurance = $224.00Real Estate Taxes = $92.00Fiber Optic High Speed Internet = $89.00Cable TV = $52.00Trash Dumpster = $55.00Sewer / Water = $186.00Natural Gas (average) = $142.00Electric = $327.00Housekeeping = $270.00Ongoing supplies = $230.00Maintenance = $133.00Total RenovationThe renovation started in 2011 and was completed 2016 with entire complex being gutted to the studs, then completely rebuilt fully furnished inside and out to new standards, as follows: 26 gauge top of the line triple epoxy coated metal roof26 gauge top of the line triple epoxy coated awning and patio coverSingle hung gas filled energy efficient EZ clean vinyl tip-out windows4 new natural gas water heatersAll new plumbing throughout entire complex/buildingOnly #1 Grade Premium lumber was used throughout entire renovationQuality Price Pfister plumbing fixtures and lifetime parts180 feet of new 4 inch sewer line from the building to the street tapNew premium exterior fiberglass dimensional Colonial style entry door with new door jams, aluminum thresholds, all new lock sets and peep holesCustom picture framed windows with decorative edging and exterior door trim to matchCommercial toilets: all new PEX plumbing, shut off valves, bullets, supply lines, hose bibs, angle stopsNew attic and wall insulation with vapor barrierUpgraded electrical, HE lighting, new fixtures, switches, outlets, breakers, energy efficient lighting, vapor lights, rope lighting and HE flood lightsCustom artistic signage (3) built by Management TeamNew drywall, texture and highest quality Valspar paint throughoutAll exterior wood was hand primed and hand paintedNew vinyl fencing for corner lotPremium Quality pillow top mattressesNew hand textured walls (office), ceiling and covered entryNew concrete sidewalks, kitchens, baths, showers stalls, toilets, vanities, cabinents, counter tops, sinks, refrigerators, microwaves, deep freezers, dryers, A/C units, flat screen TVsAll work has been documents and permitted

You can also put fiberglass drywall mesh over the joint. 

You can't replace old windows with new vinyl or fiberglass. 

Use a one-piece fiberglass shower (as appose to a tub or a built-in) they are harder to destroy and leak much less.

Just thought I'd mention my preference has been the 1 piece fiberglass bath/shower units. 

My concern is trying to make the hole bigger and to fit the panasonic exhaust fan, when there is fiberglass insulation hanging out above me.

Since the tenant is a good payer and has a regular cleaning service come in to clean the unit, I decided to work with her on the request as turnovers are costly and keeping a good tenant that is paying market rate should be a priority.My first thought was to install a 4 piece fiberglass shower kit, however, I am not a big fan of the fiberglass kits and think that they look cheap.

Steel or fiberglass?