I am getting on with the extension and i have a question about fitting the patio door next spring.
The door will sit on the external brick work, but i assume it will be sitting slightly back off the brick as the door will be about 100mm deep. so my brick is 110mm deep and the patio will be set 20mm inside of the brick. so i will get an overhang of 10mm approx.
Is this ok, or could the two cavities be tied together at about 4 places so making a stronger base for the door. If you tied them together what would you use ? I was thinking about filling in this cavity, but BC said i still needed it for drainage. Is this correct because there will be no brickwork above it, just the patio door.
The door will sit on the external brick work, but i assume it will be sitting slightly back off the brick as the door will be about 100mm deep. so my brick is 110mm deep and the patio will be set 20mm inside of the brick. so i will get an overhang of 10mm approx.
Is this ok, or could the two cavities be tied together at about 4 places so making a stronger base for the door. If you tied them together what would you use ? I was thinking about filling in this cavity, but BC said i still needed it for drainage. Is this correct because there will be no brickwork above it, just the patio door.