One suggested using spray foam on the underside of the attic walls (roof) and the other suggested blowing in cellulose over the floorboards of the attic.

@Justin Fox - you need to exercise caution with spraying {closed cell} foam directly on the underside of the roof deck as you can both prevent the roof deck from drying (insufficient ventilation) and cause condensation within the roof assembly itself ... leading to premature failure of the roof assembly.

My floor assemblies often call for floor toppings like gypcrete or lightweight concrete, as well as resilient metal channels on the underside of the joists which act to isolate the joists from the sheetrock below.

Some of the hoods like the ones that mount to the underside of the cabinet are very simple to install.  

This removes any chances the smell could leach out from the under side or thru the paint.

Do you have any pictures of the underside?

Asbestos positive materials I've run in to -* Caulk around windows and doors* HVAC duct work tape* HVAC exhaust pipes* Resilient flooring glue* Resilient flooring* Mortar in fireplaces* Lining on underside of sinks* Plaster* Drywall* Drywall mud* Siding* InsulationGoogle "Asbestos in construction materials" and the results are staggering.

It was solid and everyone who walked on it commented on how sturdy the floor felt.Another option would have been to also deck the bottom (underside) of the floor joists.

If you put insul between the beams you need an inch clear space at the underside of the deck for ventilation.

. $15.00 per closetLight fixtures – glass cleaned and bulbs replaced $15.00 per fixture /$1.00 per bulbCeiling fan, blades- clean top & bottom, motor housing dust free $30.00 -$50.00Vacuum – per room (carpet is shampooed by management after move out at no charge) $15.00Carpet- burns, stains, soil as per estimate / replacementBaseboards – dust, wipe off, vacuum per room $15.00 per roomA/C vent cover – vacuum, dust $15.00Windows – Glass, tracks, clean and dust free $20.00 per windowTo remove window pane, slide pane to center of track- grasp each side, gently lift up and pull forward to remove, clean, replace in correct order.Window- Glass replacement $35.00 per windowScreens replacement- $25.00 per window -$40.00 per patio door $25.00- $40.00Mini-blinds replacement $20.00 per windowPatio door – Glass, clean both sides, track vacuumed, wiped clean $35.00Patio blind replacement $50.00 per windowOutdoor patio globe- clean $15.00Sweep off patio and railings $15.00Bathroom exhausts fan/vent cover, clean, dust free $15.00Bathtub, clean tub and tile surround $25.00 – $60.00Bath sink, vanity/countertop, clean $20.00Bath – medicine cabinet, clean inside, mirrors, light guard $20.00 minBathroom floor & wall tile – wash, clean tile $20.00 minTowel bar replacement $18.00 minToilet tissue spindle replacement $5.00Toilet – clean inside bowl and outside $20.00 minToilet seat replacement $20.00Kitchen cabinets – wipe off grease; remove shelf paper, empty out $20.00 minKitchen-sink, countertop, wipe off, clean garbage disposal ring $20.00 minDishwasher – clean, remove any food particles from inside $20.00 minVent hood – wipe off grease, clean filter, clean light guard, top/underside $20.00 minStove/ Oven- wipe off exterior, clean under drip pans, clean oven/racks $25.00 min to $125.00Drip pans – clean (replacement cost is $7.50 each) $30.00 maxBroiler pan replacement $20.00Refrigerator/ Freezer-wash off exterior, top, seals, inside, crispers $20.00 min to $75.00Walls / Woodwork – remove nails, screws $15.00 minWallpaper boarders-removal per room $50.00 minNicotine – stained walls/ woodwork that require cleaning (see below explanation) $25.00 per hour min.The cost to prep the unit for painting requires the walls and woodwork to be washed clean from the smoke odor/ and nicotine stained damage.GaragesGarages should be swept clean and all debris removed.Floors should be clean and free of oil and fluids. $25.00 minABANDONED PROPERTY REMOVAL DISPOSAL CHARGESKitchen table $20.00, Kitchen chairs $10.00 each, Upholstered chairs $20.00 each, Sofa/ Couch $35.00- $50.00, Hide abed $45.00, Mattress $20.00, Box Spring $20.00, Dressers $40.00,shelves, entertainment centers, bookcases, end tables, coffee tables, $15.00 - $50.00 each.Computers, Monitors $15.00 each, Televisions & Stereo Equipment $25.00 - $50.00 per item.