The main difference between the two is the location of the insulation.
Insulating a tiled roof.
The main decision to make when insulating a pitched roof is if you are going to have a warm roof or a cold roof.
This is usually done by laying quilts or batts of insulation between and over the joists.
Mineral wool rolls are ubiquitous and cheap meaning a whole roof on a standard home could be insulated to the recommended 270mm with a spend of little more than 200.
This will depend on the construction on your roof and if it is a refurbishment whether the roof tiles are going to be removed.
It s worth insulating the sloping insides of a pitched roof in order to conserve heat if the space is to be used for anything except simple storage.
Install baffles on the underside of the roof sheathing net and blow cellulose into the rafter bays cover that with 2 rigid foam.
Under roof tile spray foam insulation acts to add a barrier between the inside of your home and the harsher outside protecting your property and providing significant long term benefits.
It s also within the capability of most diyers although not the most pleasant of tasks.
Insulating a roof is perhaps the easiest of all the energy saving home improvements.
The water situation made us think that is a bad idea.