Hi basically i need to install intumescent door seals to 5 fire doors. Neither the doors or the door frames have the necessary grove for the strips to be fitted into.I understand therefore i would need to use a router,which i would have to buy and have never used plus the apprioprate attachments.Could someone give me some guidance as to a suitable router and attachments to do the job .On the other hand does anybody have any idea as the cost of a joiner to do the work.Help would be great