Installing Insulated Plasterboards

[richo106]

Hi All

 

To get to my target u value of 0.18 I need to install 50mm backed plasterboard (62.5mm)

 

My plan was to just dot and dab on the majority of the walls to overcome any unevenness in the existing walls, am i right in thinking that dab is around 12.5mm thick?

 

I was thinking for mounting my sockets using 40mm wood and then 35mm back boxes to make it up to 70mm...is this the best way of doing it? The wall will be parged first before dotting and dabbing

 

What is the best way to hang TV's on insulated plasterboard? (if any)

 

I have one wall that will have a row of kitchen units on, what we would be the best way to have 50mm PIR insulation on this wall but also give me a good fixing for my kitchen units? I need to work this out so i have accurate measurement for my kitchen design

 

Any information/advice greatly appreciated

[PeterW]

It’s expensive and tbh I would go with battens and 25mm insulation and then use standard boards. 

[jayc89]

I've used PU adhesive to stick PIR to the wall, 25mm battens on top as both mechanical fixings and a service void for sockets etc. PB on top of that. 

[richo106]

4 minutes ago, PeterW said:

It’s expensive and tbh I would go with battens and 25mm insulation and then use standard boards. 

One option I did think of was to have 25mm battens with 25mm PIR between, then 25mm PIR over the top with all joints taped etc.

 

Then screw my plasterboard through the 25mm PIR into the studs.

[richo106]

1 minute ago, richo106 said:

One option I did think of was to have 25mm battens with 25mm PIR between, then 25mm PIR over the top with all joints taped etc.

 

Then screw my plasterboard through the 25mm PIR into the studs.

Thank you! definitely an option to consider

 

I just worry about getting my battens all level and plumb

[BotusBuild]

12 minutes ago, richo106 said:

I just worry about getting my battens all level and plumb

A laser level and a plumb line are your friends for this :-)

[nod]

Pink backed insulated PB are ideal for dot and dab Simply solid dab where you have kitchen units etc 

I did all the perimeter walls on ours 

[Thorfun]

21 minutes ago, richo106 said:

Thank you! definitely an option to consider

 

I just worry about getting my battens all level and plumb

surely the plasterer will get all the minor imperfections out? or am i being naive?

[nod]

If the batons are wonky The plasters will follow what’s there 

The good thing about insulated boards is they are flat and rigid 

Any bad shapes in the studs will cause a step 

They are better fixed to gypliner As you can easily get it perfectly flat 

[Thorfun]

7 minutes ago, nod said:

If the batons are wonky The plasters will follow what’s there 

The good thing about insulated boards is they are flat and rigid 

Any bad shapes in the studs will cause a step 

They are better fixed to gypliner As you can easily get it perfectly flat 

ok. thanks. me being naive then! will make sure that my boards are flat and true when i come to fit them. 😉