I am re building the Groco head
and re installing it. But the Groco K is replaced an OEM head
The head is mounted on a fiberglass
gel coated insert which forms the shower
pan and part of the hull
liner behind the head. The area where the head is bolted down had solid wood beneath the liner for a secure attachment of the head.
Cosmetically the Groco did not line up with the former head bolt holes (4) and so when I installed the Groco years ago I screwed in some round head screws to fill in the old holes. Not especially attractive or hygenic, I suppose. I now have 8 holes into the liner and into the wood below
My plan is to install a corian disc which would cover all the old holes (8) which I would file in with epoxy
so no moisture can get into them and into the wood below. The Groco will then be mounted on top of the disc.
My quandary concerns how best to mount this new "assembly". The options are:
1. Use 6 flathead countersunk stainless steel
screws in a circle, and then tap the corian to receive 4 stainless bolts w/ washers to secure the Groco I can add acorn caps over top of the nuts. No adhesive
between the corian and the gel coated liner for easy removal
2. Use 4 flathead countersunk stainless steel
screws located under the new head so they would unseen, and then tap the corian to receive 4 stainless bolts w/ washers to secure the Groco. I can add acorn caps over top of the nuts. No adhesive
between the corian and the gel coated liner for removal
and replacement. (4 holes penetrating into the wood)
3. Drill 4 clearance holes through the corain and use ss anchor
bolts (screw threads on the end going into the wood and machine threads to accept the nut and washer securing the Groco. The corian acts like a spacer/cover and plays no part in holding the head. Drive the 4 anchor
bolts deep enough to accept SS acorn nuts and washers. (4 holes penetrating into the wood)
The above options with a round bead of silicon caulk at the bottom edge of the corian to prevent water
from getting under it.
Note the entire head is also the shower
so there is water
I don't like the exposed screw heads because water will collect on them and work it's way down into the wood below, so the fewest penetrations into the wood seems like the best approach. Even bedding the flat heads in caulk seems like something which will leak eventually.
Do you think I should put silicone into the anchoring
holes (in the wood) below the liner?