I am having granite steps installed. The platform will be 7" from the threshold but currently there is a 10" board sill/kickplate (white) with OSB behind it.
I think the proper way is to remove both boards and replace with composite. I am slightly hesitant to do that simply because the kickplate appears to be supporting the metal base of the door and I want to keep things simple for now. Is that just a silly thing to be hesitant about?
Would it be unwise to take a circular saw to cut some of the two existing boards off so that the new steps would fit under them against the foundation and deal with the now shortened kick plate later? This is assuming the concrete is at that height. If it isn't, I would put a composite board against the foundation for the steps to rest on. Any advice is appreciated.
Best Answer
The metal threshold will support itself over that span with no issue. You won't want to leave it without the boards under it for the long term, though, as it will bend under the weight of people stepping on the unsupported metal, but for the short term of the construction project (where it's getting little to no use and you can remember to not step on it) it will be just fine.
Also, I highly doubt you'll need a saw to remove that wood there, just the careful application of a pry bar. Those pieces should be nailed to the wall and there shouldn't be any attachment to the threshold or the ends of the siding.
Also, check with your contractor - what does he expect to find when she gets there to do the actual install?
You will definitely want to replace the trim after the steps are installed. This way you can ensure that you have a nice tight fit under the door and to the top of the step. If you install it before hand, it might be in the way or even get damaged during the installation.
Composite/PVC trim would be an appropriate material to use here when you do replace that trim material. You'll probably need 2 layers to bring it back out from the outside wall of the house to be flush with the bottom of the threshold.
Be sure to caulk the ends of the trim pieces (both of them) where they butt up against the siding to ensure water can't leak behind.
Be sure to apply a thick bead of caulk to the top of the trim where it meets up with the bottom of the threshold.
Attach each board individually to the wall, just be sure to offset the screws to that you don't run the outer board's screws into the ones beneath.
Ask the contractor what kind of sealant they recommend between the bottom of the trim and the top of the step (if any).
You can get screws (with a driver bit) specifically for PVC trim. The ones I got included a driver with a depth stop and a set of plugs to cover the screw heads. They're essentially invisible once the plugs are in place. Worth the extra few bucks in my opinion.