Cedar trim over Hardie cement panel, any tips ??

[kidcampbell71]

Hello all.

I've been working on a spare garage building. Replaced some rotten lumber, reframed some stuff, installed new OSB sheathing, and top finished with Hardie brand cement panel.

Built a garage door overhang, and trimmed it out with cedar board. Getting ready to move on to the front of the garage I just repaIred in the previous paragraph. Plan is to trim out the garage with additional cedar.

No interest in faux painting cement trim boards. My house has a large amount of stained cedar on it already. Plan is to match the house.

I see a general coil nailer used to attach Hardie products. I of course, didn't use a coil nailer. I pre-drilled and screwed the cement panel onto the structure.

I don't want to screw the cedar onto the building. Screws will look sh*tty on the cedar.

Any of you guys have any proven advice, in such an endeavor ?? I've looked thru YouTube, and search engines .. nothing specific. I wish I had more experience with cement board. Will attempt to contact Hardie if all else fails.

Thanks, as always. Much appreciated.

 

[Bert_]

I'd probably just hand nail with galvanized casing nails.

Not sure what the trim is going around but if it's going to be on the tops of windows and doors it should really be flashed.

 

[Skiff Builder]

A good trim screw would disappear in cedar.


https://www.manasquanfasteners.com/product/decking-screws-deck-drive-DWP-trim

 

[kidcampbell71]

My garage door casing is all flashed. Panel abutments have the mandatory z flashing. The overhang is step flashed, and its roofing flashed.

Just want to jazz up the plain panel to match my house. Guess I could hand nail, & predrill every hole .. .. like I did to hang the cement panel .. but dang that's a lot of trim to do as such. There would be significantly more fasteners on my trim out, than the bulk total of my Hardie hanging.

The cement panel has a tendency to chip out and break. Thus my predrilling adventures.

Interesting the trim screws. Here, cedar trim is attached with a headed ring shank nail. Wonder if those trim screws would allow the board to back out ? Have you used such a fastener on cedar outside trim, before ? Texas is very hot, and very cold. I wonder .. ..

Looking for a faster, proven, professional alternative. Thanks for the replies. I'll look into the screws, and see. I dunno' if they will hold the board snug for a long period of time.

 

[Skiff Builder]

Yes, I've used them on cedar. Most recently on my outside stair treads and risers and docks. No issues, sink them just below the surface. The wood seems to swell right over them and make them disappear.
Remember that one of the plus's of cedar is it's dimensional stability. It's not gonna twist it's way out from under the screw

 

[kidcampbell71]

Wow. That's damn nice. I love cedar.

I have a Paslode fence nailer, that I hung all my house cedar trim, with. Of course, the house has Masonite panel. No issues.

When I acquired the Hardie panel it was for another job, that the homeowner backed out on. Had a guy hired with the coil nailer recommended by Hardie. I've had no prior experience with cement board.

To be truthful .. this cement panel, then sat outside, standing on edge for 3 years. Probably should've stored it flat. Anyways, my initial attempt to hang panels with my nailers, all Paslode .. one framer, one fencer .. .. both blew the panel apart like as if I was ***** shooting.

So I reluctantly, was forced to drill and screw. Brittle from pneumatic nailer .. or perhaps, weather aged ? I dunno'.

I do like the look of the fasteners you recommended. You installing them on clearly, soon to be weathered treads .. definitely prove their value.

I'll be 12 to 16 feet off the ground, trimming this garage. I can drill and screw, for sure. LOL. But wow.. this damn, little building is destined to keep kicking my *** .. I guess. What a beating !!

I may test some scrap cedar, against some Hardie scrap, and stud lumber .. .. like the fence nailer will suddenly work differently with cedar board padding .. over my shrapnel Hardie panel. Bahahahaha !!!!

 

[kidcampbell71]

Yes, I've used them on cedar. Most recently on my outside stair treads and risers and docks. No issues, sink them just below the surface. The wood seems to swell right over them and make them disappear.
Remember that one of the plus's of cedar is it's dimensional stability. It's not gonna twist it's way out from under the screw

Just ordered a box for my cedar tongue & groove soffits on that building.

 

[Skiff Builder]

I just started using a fastener I never have before. Narrow crown (1/4") staples in 316 stainless- 1" to 2" long. Using on current boat build when doing epoxy glue ups. Those things hold well even without glue and almost disappear in pine/fir/cedar. Wish I tried them earlier.....
I got a piece of cement board siding- will test it out for kicks tomorrow.

Good luck with the trim job.