ironspider
Member
Greetings all,
Finalyl got hte tub/shower alcove framed in and now we are moving on to putting up our hardiebacker 500 (1/2inch) to the alcove.
I am using backer-On screws (square drive) to attach the hardibacker 500 (the 1/2" stuff) to the studs.
My question though is that when I drive the screw as it begins to come up flush the area around the screw's head pushes up creating a little "bump" that consists of the pushed up hardibacker and the screw head. Thinking about basic physics this must be normal right? because as the screw head goes into the board the head presses down, displacing the board that was there--forcing it to rise up around the head. But it just seems that this makes the surface not flush anymore. It also seems like the screws don't countersink that well--if at all.
So I guess my question is whether or not the screws should be countersunk, or more flush, or more "just above" the board.
In any situation, should I be sanding down the raised board around the screw head? Or does the thinset even it all out?
I've also read that maybe I should back out the screws now, clear out that raised and broken up backer board from the screw hole path, and re-drive--does anyone do that method?
Thanks in advance!
-john
Finalyl got hte tub/shower alcove framed in and now we are moving on to putting up our hardiebacker 500 (1/2inch) to the alcove.
I am using backer-On screws (square drive) to attach the hardibacker 500 (the 1/2" stuff) to the studs.
My question though is that when I drive the screw as it begins to come up flush the area around the screw's head pushes up creating a little "bump" that consists of the pushed up hardibacker and the screw head. Thinking about basic physics this must be normal right? because as the screw head goes into the board the head presses down, displacing the board that was there--forcing it to rise up around the head. But it just seems that this makes the surface not flush anymore. It also seems like the screws don't countersink that well--if at all.
So I guess my question is whether or not the screws should be countersunk, or more flush, or more "just above" the board.
In any situation, should I be sanding down the raised board around the screw head? Or does the thinset even it all out?
I've also read that maybe I should back out the screws now, clear out that raised and broken up backer board from the screw hole path, and re-drive--does anyone do that method?
Thanks in advance!
-john