Solid Base for Sliding Doors

[DavidL87]

I’m having sliding doors fitted. I already have the opening in place and just had the survey for a 2 pane, 3.7m glass sliding doors. The back of my house is about 3ft higher than ground level so we have decking that you step onto and down stairs.

The doors have a 125mm track and typically sit about 25mm back from the outer edge of the outside course of brick, so basically I need 150mm solid base for it all to sit on. My outer course of bricks are 100mm wide but then there is a cavity approx 50mm wide then joists (see image). What is typically recommended in this situation to strengthen/widen this area ready for the new doors?

 

[23vc]

Can they just over sail into the cavity a bit? Or has someone specifically said the whole 125mm needs a solid base. I’d think given the doors are fixed at the sides and possibly the top, you should be ok…

 

[DavidL87]

Can they just over sail into the cavity a bit? Or has someone specifically said the whole 125mm needs a solid base. I’d think given the doors are fixed at the sides and possibly the top, you should be ok…

I’ve only heard from the surveyor / sales guy of the doors. He told me they need ~150mm base (125mm track + 25mm sat back from outside brickwork) for it to all sit on. So not an actual door installer or builder yet.

I was thinking is there any benefit in buying some sort of steel plate to sit on the top and cover the cavity gap? Maybe 150mm-200m wide so it sits on the outer course of bricks, covers the cavity and then sits on the inner course of bricks & joists?

 

[23vc]

Don’t think there’s any point in a steel plate. You could shove dpm down into the cavity to form a trough and pour concrete in, up to the level of the top of the joists which is made a bit more awkward by the joists being there but guess it’s an option. But I’d check in more detail whether that’s really needed from the door perspective

 

[noseall]

I’ve only heard from the surveyor / sales guy of the doors. He told me they need ~150mm base (125mm track + 25mm sat back from outside brickwork) for it to all sit on. So not an actual door installer or builder yet.

I was thinking is there any benefit in buying some sort of steel plate to sit on the top and cover the cavity gap? Maybe 150mm-200m wide so it sits on the outer course of bricks, covers the cavity and then sits on the inner course of bricks & joists?

Go back and tell the surveyor that brickwork is typically 105mm wide and the doors can sit on that.

 

[^woody^]

Every door system will have a sectional detail for the threshold, so get hold of that

 

[DavidL87]

Every door system will have a sectional detail for the threshold, so get hold of that

Thanks! The doors are sold as a Cortizo ‘GS20’ sliding door, they are 2 pane / track. Is the sectional detail something readily available online? Or will I need to wait for the survey info to be sent over do you think?

 

[DavidL87]

Every door system will have a sectional detail for the threshold, so get hold of that

I’ve literally just been sent this, is this what you were referring to? How’s that looking to you?