However, you may have a box sash scenario when the reverse of the plan view is shown in fig.5. You will need to measure brick to brick externally then add 5-10mm each side (to the smallest size), so the outer frame sits nicely behind the existing brickwork.
With a box sash installation the frame can be fixed with a frame addon to make up the gap. Addons available in 15, 25 & 50mm
(It will be necessary to remove existing architrave to survey accurately.)
Cill Options
When entering sizes for manufacture they included the cill which is 30mm high if required.
Open In door with aluminium low threshold fitted on
85mm PVC sub cill to stone/concrete.
Open In door with aluminium low threshold fitted on
150mm PVC sub cill to brickwork.
Open In door with aluminium low threshold
fitted on to stone/concrete.
Open In door with PVC threshold fitted on
85mm PVC sub cill to stone/concrete.
Open In door with PVC threshold fitted on
150mm PVC sub cill to brickwork.
Open In door with PVC threshold to stone/concrete.
