Battens under joists for insulation

[Thedreamer]

Evening folks,

 

Just after an idea of what type of timber you have used to hold up insulation on joist?

 

And type of screws?

 

Any pictures would be greatly appreciated.

 

 

[Declan52]

You can use Rockwool that is much denser than the Normal attic version that once cut to size it will sit there and won't say.

Same goes if you intend to cut up sheets of pir. It's cut and squeezed in so it's tight against both sides. Any gaps can be filled with expanding foam.

[Redoctober]

Not sure about insulation being nailed / screwed to the joists but like @Declan52 has said, insulation usually goes in between the joists - that is certainly the way we did ours. See image - Nothing required to keep it in place as the width of the insulation came in at the same width of the gap between the joists.

 

[Thedreamer]

Sorry should have said it's for our suspended floor.

 

Having a layer of Kingspan and then Frametherm wool on top. Timber is to support the kingspan, which will fit snugly in the joists but will still need some support.

 

 

 

 

Edited September 21, 2018 by Thedreamer

[ProDave]

Type of joist?

 

Our ground floor has JJI joists and I cut sheets of OSB to lay in the bottom to support the insulation.

[Thedreamer]

4 minutes ago, ProDave said:

Type of joist?

 

Our ground floor has JJI joists and I cut sheets of OSB to lay in the bottom to support the insulation.

 

Just plain old wood joists. Did you use thin strips of OSB and attach with screws? 

[ProDave]

2 minutes ago, Thedreamer said:

 

Just plain old wood joists. Did you use thin strips of OSB and attach with screws? 

The OSB just sat in the bottom of the I beam. Does not help you though.

[nod]

11 hours ago, Thedreamer said:

Evening folks,

 

Just after an idea of what type of timber you have used to hold up insulation on joist?

 

And type of screws?

 

Any pictures would be greatly appreciated.

 

 

Two 50 mil collated screw in each joist