Fixing roof trusses to a wall plate requires a small amount of carpentry knowledge such as the abilities to read a tape measure and operate a framing square.
Fixing flat roof to wall.
To install the roof wall flashing above the builder bent the top edge of the flashing into a 90 degree lip about 2 cm in width.
But if the flashing rusts through or a piece comes loose water will run right behind it and into the house it goes.
To fix the joists and rafters down on to the wall plates they should be toe or skew nailed to the top plate like below.
Step flashing is used along walls that intersect the roof.
Make sure you offset yo.
And tie it into your hip roof.
Unless it is detailed to allow for movement any slight deflection of the roof could cause a break in the waterproofing membrane at the roof parapet wall junction.
How to remove repair and install a flat roof.
Otherwise setting roof trusses onto wall plates can be done by the average do it yourselfer usually in one to two days depending on the size and scope of the project.
Each short section of flashing channels water over the shingle downhill from it.
Any leftover dirt gravel and water in the area can prevent the repair material from bonding to the roof.
Always clean up any areas you wish to repair.
That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above.
In addition sweeping the area clear gives you a better view of the damage.
This is a long video but it will show you how to do it.
Set out the ceiling joists onto the wall plates the ceiling joists are installed before the rafters as they will stop the roof spreading and also give something for you to lay planks across to stand on when building the roof.
A common area which needs to be designed and constructed properly is the joint between the flat roof and any parapet wall.