Sectional/Tilt spring replacement should only be carried out by a qualified technician. Mr Door offers a service where most repairs are completed on the day of your phone call. Mr Door are 2nd to none when it comes to spring replacement for a reason – your door’s total lifting system is serviced (bearings/cables/hinges/powerarms/bolts/brackets etc.) Why you may ask? Well, when you get your car serviced, you don’t just change the tyres, do you? Why should your garage door be any different?