As said above, there are those plastic fir trees for fitting the headlining back on. The bubble wrap is thin enough as to not interfere with the headlining. The headlining is only secured down the sides above the doors, above the rear bulkhead and via the sun visors. You cold put as thicker stuff as you like between the headlining and roof because there are no fitting points in the middle to the roof. I was perfectly able to use my old fittings too. The spray glue was around £3 each and I used 3 cans, the roll of insulation was on offer 2 for £25 quid I think. I could have used just one roll but I doubled the thickness for added warmth. The fabric was about £20 a roll but you could get it cheaper online I think, I didn't bother to look around I wanted it done that weekend so I bought the first I came across.