Laying attic insulation over attic boards

paddylonglegs

Hi folks. I am doing an attic clear out and later plan to insulate the attic. In areas of the attic there is a layer insulation between ceiling joists and then it is covered in various wooden boards. I was wondering will it make a difference if I just lay my insulation over existing boards? Considering there is a layer of insulation under the boards already? ( I just don't have the time to remove all these boards)

I will not be walking in this area but want to put in the 300mm of insulation to help as the house is getting on 20 years.

Thanks

MicktheMan

Are there gaps between the insulation and the boards?
If there is (which I suspect), then the boards need to be lifted.

tommy100

Jlayay wrote:

I am a student in UCC and I've tried Aroma by the opera house and found their food was a bit on the saltier side even for me (and I like salty foods).

I did this for a living before. Yep mick is right. It depends on where boards edges are

paddylonglegs

MicktheMan wrote:

Are there gaps between the insulation and the boards?
If there is (which I suspect), then the boards need to be lifted.

There is the original insulation which was probably squashed down when the boards were laid over it. This is in between the ceiling joists and under the boards if that makes sense

tommy100

What we want tk know is there a gap between top insulation floor boards, (10mm is enough to leak heat). (Is it 100mm joists filled with 100mm insulation, then floor board). A pic would great to see extents, but not sure if u can post a lic on this website

paddylonglegs

Hope this helps but yes it would be 100mm joist filled with 100mm insulation, then the floorboard. Will try get a pic if I can.