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I should try those on the new pressure-treated treads of the front steps: they refused to stick to cedar for an entire winter. What I'd really like but cannot find locally is the recycled plastic/crushed reused concrete decking surface/ stair treads I saw on HGTV once. I've spent sufficient of my life scrubbing and skid-proofing steps, and I'd like to move on to other thankless pursuits.
the recycled plastic 2x4s had a bad problem with warping and splitting -- those that had them, mostly had to remove all and go back to wood-based lumber
or remove and add flexible grommets at the attach points, attach with bolts rather than screws, and attach every six inches or so
so far the Trex (copyrighted) decking seems to be holding up under use ... but $$$
next summer when we re-treat the steps, after they dry out, I'm thinking of adding sand to the oil, or using a stain which might provide a higher coefficient of friction
I doubt that shingles would stick without being nailed, and I don't want to nail into cedar, too much of an entry for fungus and rot and carpenter ants
in the best of all possible worlds, we'd add the ADA-certified tile that we used in the shower ... even with liquid soap on it, you don't slip .... however there would need to be some waterproofing done underneath, as wet cedar without air passage, rots disastrously
I'm probably going to have to re-deck the front porch next year, and will probably use Trex for the main deck; I wish, since it's not beautiful in and of itself, it would either be paintable/stainable or come in a few colors other than rice, oatmeal, mouldy rice, mouldy oatmeal, and puke.
Given long enough PVC pipe and big enough clear tarp, there are days I would just build a hoop house from the front patio to the ridge of the barn roof. It would save the times the autumn leaves pile up on the roof and create a dam which sends water down through the hall bathroom fan, for one thing.
