Loft insulation - Kingspan?

[Huge]

Worth tinkering with for that money.

[Doctor Drivel]

It is best to do what I suggested. You can have the foam under the boards and areas where there are no boards Rockwool at 90 degree to the joists. Cold bridging is insidious. Eliminate it.

[george [dicegeorge]]

and cans of foam to seal the gaps- i believe most heat is lost in air currents.

[g]

[Doctor Drivel]

Yep. Seal the ceiling isolating the house air and loft air. Do not forget the loft hatch. Insulate over and make sure the seal is 100%.

[Doctor Drivel]

I a vented loft, you can put OSB on the inclined rafter and 3 ridge vent tiles on the apex. Seal at the bottom of the OSB to the ceiling plasterboard and make long space under the apex, making a small abut 1 foot wide ceiling. This means air run up between the OSB and tiles and out the ridge vent tiles. The loft area is then sealed up and cold outside air does not enter the loft. Foam insulation can be attached to the OSB as well. This keep the items in the loft in better condition as they are subject to damp freezing cold air. The insulation value of the house below rises as well.

[Grimly Curmudgeon]

We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember Lobster saying something like:

Just bought one, will see what it's like. At that price, if it's within its stated tolerance it'll do.