Wrong forum Insulating Attic-3bed semi

Hi,

I want to re-insulate my attic this winter. I currently have Rockwool Blown Loft Insulation for the last 5years.
I’m considering insulating over this with new insulation, preferably the type that I can roll between the joists. Is this advisable or should I go to the hassle of removing the old insulation beforehand (id rather just insulate over it).

Also, any recommendations on which type of insulation to use?

I have some condensation on the north facing felt during severe cold snaps. I’m hoping that proper insulation will prevent this occurring.

Any suggestions much welcomed.

xtratherme rafter lock seems very good and easy(ish) to install that should stop the moisture issue and mean you can leave down your other insulation, dont forget to leave 25mm air gap between insulation and felt

Have you experience using this insulation? I google'd it for info. Looks fairly easy to install or is it?