DIY - Insulated Plasterboard - Will BC Accept?

[iSelfBuild]

Just had a price for 25mm insulated plasterboard @ £27.00 a sheet 

 

Is there any reason why we can't just fix 25mm Recitcel to our rafters, tape all the joints with foil tape and then screw the plasterboard through the insulation onto the rafters?

 

Will BC accept that or is there a condensation risk because it's not bonded seamlessly? 

 

There is 100mm Recitcel between the rafters as well. 

[jamiehamy]

Is the insulated plasterboard the vcl? If not, no reason at all.

[Russell griffiths]

The way you are proposing looks better to me, you are taping all the joints then covering and going to tape and joint or skim the plasterboard. 

I can never understand how they think insulated plasterboard is any good, how do you join all the foil faces together.?  

[Cpd]

1 hour ago, iSelfBuild said:

Is there any reason why we can't just fix 25mm Recitcel to our rafters, tape all the joints with foil tape and then screw the plasterboard through the insulation onto the rafters?

Exactly how I am going to do it. 

[nod]

You do that 

The reason why it’s not usually done that way is the ceilings can finish quite Wayney 

You will also get a lot of screw pops when the heating goes on  

[nod]

Just checked what I’ve been paying

G tech 22 mil insulated PB

&14.09  2.4x1.2 sheet 

[iSelfBuild]

16 minutes ago, nod said:

Just checked what I’ve been paying

G tech 22 mil insulated PB

&14.09  2.4x1.2 sheet 

 

That's EPS not Foil faced polyurethane ?

 

Jewsons wanted £28.00 a sheet for that sort of stuff - GYPROC ThermaLine 38mm

[nod]

Jewson’s and TP are expensive 

The G tech and Knauf  are fine 

 

[bassanclan]

If you ring this ebay seller they usually have some good seconds reasonably cheap

 https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F292423373977

[MikeGrahamT21]

I always use these for insulation https://www.secondsandco.co.uk/

 

You'll be able to get phenolic boards probably cheaper than the PIR you've got a price for, and they're always in good condition i've found