Wall insulation help.

[Pa Co]

Hi - Looking for some help.

Our dormer window bedroom is cold with these walls being very cold. After removing the plasterboard, this is what is behind. A mixture of loft insulation stuffed into the RSJ and Kingspan.

Should I use expanding foam in the small gaps or just tape them up?

Does this insulation meet building standards?

Cheers for any help.

 

[Alastairreid]

You need to make sure the roof has enough insulation as well...warm or cold roof.
Try thicker insulation in walls by increasing the depth of the studs.