Rear Step Help

Outside my laundry door I dont have a concrete step or any step for that matter, just the timber tread???. When I paved around the house with sandstone looking 500 by 500 pavers I bought a couple of bullnosed pavers to create this step. Now I have about 140mm from top of paver to the underneath edge of the timber tread so what I was thinking was I could use hebel as the base layer/ and direct stick the bullnose paver to this, sliding it in and under the timber tread. I would then...

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