Replacing wooden 'step' near door

[CallmeGoose]

Got a piece of wood that must act like a seal to stop water coming in, at the rear of the house which is beginning to rot. Any advice on how to replace it? Do I need specific wood, or sealant etc?,

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[MHP]

That's called a threshold. It needs to be hardwood. You can cut the old one out but getting the replacement in might be a bit tricky. You may have to remove some of the cement from the front.

[Squizza]

Can you not use some wood rot hardener then catty the funk out of it before painting it with something like Ron seal Step Paint?

[big3card]

I covered mine with pvc window sill, little slippy when wetbut tbh it hardly ever trud on