You have to do it thoroughly so that the rafters sit flush on it.
Leveling existing roof and porch surface.
Place one precast concrete deck footing directly under the point where the porch was the lowest.
To preserve that consistent level height we nail mid span blocking in place and secure each piece tightly with 4 inch timberlok screws two at each end see photo bottom right.
With the level in position take a close look at the location of the bubble.
So to begin i removed the existing counter flashing running about 5 courses up this was as easy as finding nails and prying.
Then without lifting the level rotate it on its axis 180 degrees and let it come to rest in the same position on the surface.
When we are ready to begin decking we remove the roberts ridge.
In raising the roof i knew was going to have to reset the roof s flashing as it meets a sidewall of the house.
If the bubble is in the same position as before the level is accurate.
Neglecting to prepare the old surface will prevent the new concrete from adhering correctly resulting in a weak bond between the two layers.
Make a cutting on one of the sides of the horizontal roof beam on an angle.
Measure from the bottom of the horizontal support beam to the inside bottom of the 4 by 4 receiving.
Empty the contents of the large bucket onto the concrete patio starting at both corners of the sloping end.
Attach the horizontal beam by using a nail gun.
Allow the leveling compound to flow and level itself for one to three minutes or until it stops.
After that to make it flush with the roof of the existing house cut the two outer rafters.
Leveling existing concrete patio for drainage hello i am planning a diy project to screen in my existing and covered concrete patio.
The compound must be flat to avoid future ponding and roof leakage.
After the compound dries water is poured over the area to check for existing ponding.
Clean the area thoroughly to ensure the primer gets a good bond before priming the area.
Use the flat side of a metal trowel to feather the edges of the leveling compound flush with the rest of the patio.
Mix the crumb rubber epdm and eps expandable polystyrene beads with the greenslope adhesive using a bucket or bag and pour it out over the area.
Things to consider with jack up a porch roof the prep.
You can level an existing concrete floor with a leveling layer of new concrete but you must prepare the old concrete floor first.