As above, I have 2 x 1.2m oak mantel's (200 depth x 100mm height) that I want to mount above 2 gas fires both fitted into chimney breasts that are each about 1.3 and 1.4m wide.
The face of the chimneys appear to be double brick (i.e. 2 x brick widths) thickness to the flue.
I have planned to fit them using something like Rawlplug R-KEM II Styrene-Free Polyester Resin with probably 5 or maybe even 7 x 27cm lengths of M16 threaded bar, 15cm glued into the oak and 12cm glued into the chimney breast, and also with the chimney face of the oak also lined with some resin, then braced as it sets hard.
I'm concerned that the weight of the oak cannot be taken by the chimney breast either immediately or over time.
Am I right to be concerned or should I go ahead?
Do you experts have any other tips with regards to fitting the mantels?