Over the year my attic insulation as fallen apart. The foil has deteriorated and all the insulation is just loose. I need to replace with new, but question is do I need to remove all the loose insulation first? or just cover over it?

Yes, any bad insulation needs to go as it will further deteriorate and cause more problems down the road.

4 hours ago, wildoates said:

Over the year my attic insulation as fallen apart. The foil has deteriorated and all the insulation is just loose. I need to replace with new, but question is do I need to remove all the loose insulation first? or just cover over it?

what kind of roof? quality tiles? cheap 3 mm tiles? tin roof?

you might just need to by rolls of insulation and just lay them over your ceiling instead of trying to glue or replace your insulation but it isn't cheap but it is the best work around

9 hours ago, Pouatchee said:

what kind of roof? quality tiles? cheap 3 mm tiles? tin roof?

you might just need to by rolls of insulation and just lay them over your ceiling instead of trying to glue or replace your insulation but it isn't cheap but it is the best work around

Its a good tile roof, the old insulation was lay on the ceiling house was built 20 yrs ago

10 hours ago, Furioso said:

Yes, any bad insulation needs to go as it will further deteriorate and cause more problems down the road.

thanks

Rip out the old insulation and put in a radiant heat barrier. Works a lot better. Insulation is great in cold climates but actually a detriment in hot ones.