Tiling a Porch floor.

[bluenun20]

At the moment my porch has ugly concrete paving slabs on the floor.

From the outside path there is 1 step up to get into the porch.
The floor level in the porch finishes just below the Damp proof membrane.

I know on the outside path levels should always be 2 or 3 bricks below the DPM but does it matter in the Porch which is totally weatherproof?
If I tile on top of the slabs the finished level will be about 1/4' or 6mm above the DPM, is that ok?

 

[JohnD]

why don't you want to lift the concretre paving slabs?

 

[gday2uk]

In theory if the porch has no dpm then you are in effect bridging the dpc. You can get around this by laying a small piece of dpc under the tiles meeting the house, leaving some sticking up that you can trim back when tiles set off.