I have a two story four square house with a front porch across the front. The posts supporting the roof have rotted and the porch roof has settled about 1 1/2" the roof extends out 8' from the house and is 25' long. I have put in temporary support posts I need to jack the porch back up and then put in permanent supports. I was thinking three screw jacks one at each corner and one in the middle and slowly raising it. Would this work or is there a better way?

Jan Anderson