Hello, new to this forum, not great with technical terms but here goes ....
Am building extension with 5metre opening (for bifold glass doors). Structural engineer designed flitch beam to span opening and support flat roof.
Beam is now in place and need to put 2 courses of concrete block on top. Do I need to put something between the timber and the mortar, as am worried about the expansion of timber vs that of the masonry? (Timber specified was C24 grade and treated).
A friend suggested hardibacker board, but won't that risk crushing with the weight of the roof?
Can anyone help?
Thanks in advance.
Am building extension with 5metre opening (for bifold glass doors). Structural engineer designed flitch beam to span opening and support flat roof.
Beam is now in place and need to put 2 courses of concrete block on top. Do I need to put something between the timber and the mortar, as am worried about the expansion of timber vs that of the masonry? (Timber specified was C24 grade and treated).
A friend suggested hardibacker board, but won't that risk crushing with the weight of the roof?
Can anyone help?
Thanks in advance.