The existing insulation is non existent and will be being removed as i move into the loft space shortly to give it an overhaul. The loft space will be used for storage only and the upstairs rooms will all be fitted with downlighters.
Joists are 150+ deeps between upper floor ceiling and loft floor.
I have used quilt before and whilst it is cheap and easy and gives the results i used it in a loft that was not very accessible. This loft whilst only for storage will be accessed quite a bit so i want a sturdy floor in there to walk about on.
The options as i see them are;
1) Install fire caps to all downlighters (60 ish), install quilt, counter batten over joists and board out
2) Install PIR on top of joists and board over (is this acceptable) leaving the depth of the joist as a void for cables and downlights
3) Install PIR between the rafters and board out the floor leaving the depth of the joist as a void for cables and downlight
I guess option 3 is less energy efficient as i will be heating the loft from the rooms below when there is no need.
What do you think is best.
I am having the roof re finished in the next few weeks so thought if i am going with PIR it would be a good time to order the material as it can be dropped into the loft in full sheets rather than having to cut them down to go through the hatch.
Joists are 150+ deeps between upper floor ceiling and loft floor.
I have used quilt before and whilst it is cheap and easy and gives the results i used it in a loft that was not very accessible. This loft whilst only for storage will be accessed quite a bit so i want a sturdy floor in there to walk about on.
The options as i see them are;
1) Install fire caps to all downlighters (60 ish), install quilt, counter batten over joists and board out
2) Install PIR on top of joists and board over (is this acceptable) leaving the depth of the joist as a void for cables and downlights
3) Install PIR between the rafters and board out the floor leaving the depth of the joist as a void for cables and downlight
I guess option 3 is less energy efficient as i will be heating the loft from the rooms below when there is no need.
What do you think is best.
I am having the roof re finished in the next few weeks so thought if i am going with PIR it would be a good time to order the material as it can be dropped into the loft in full sheets rather than having to cut them down to go through the hatch.