Hi All

 

As you have probably noticed from my other posts I am sorting my quantity and type of insulation required. I want to insulate between ground and first floor

 

I have 225mm posi joists, there will be UFH spreader plates (installed from below) MVHR ducting and all other services (cabling, pipes etc..)

 

What is the best insulation between floors? and guessing I would install all services and then push the insulation in around everthing?

 

Many Thanks

 

One option I thought was to install my UFH spreader plates and then push up 100mm Isover APR insulation up to it

https://insulation-uk.com/products/isover-acoustic-partition-roll-apr-1200

 

Then install my MVHR ducting and cabling/pipes etc...

I have just found this option from

@Nickfromwalesand this sounds exactly how I want to do it. 

Consult the posi-joist literature for sound and fire resistance requirements.

One issue I have come across is the Isover APR insulation is that it is pre cut at 600 but my joist centres are 400.

 

would it be better to use standard loft insulation (isover space saver) that is perforated at 400mm?

 

I know the acoustic performance won’t be as good but will it more suitable to install?