has anyone ever built with cement SIPS before? i came across a company that manufactures cement SIPS and i'm wondering if it will be a good fit (over metal SIPS) since i want to be able to tile in my bathroom. any thoughts are appreciated. :o)

I've seen people use MgO SIPs (not in use long enough to say) and the somewhat similar SCIPs (works fine). But perhaps best to investigate the ways to attach tile to steel SIPs.

jonr
,tile mastics and thinsets have a hard time drying out between the metal skins and tile, but a 1/4" hardi-backer can be screw attached to the steel skins.
my client that built the workforce housing in the Bahamas is looking to build a barracks at GTMO and for economy reasons is going to utilize the metal panel skin as the shower wall surface with a sealed fiberglass shower pan below.

MGO: absorbs water and is banned from use in wet areas, cement board is brittle and will not flex much.
probably not a good choice for a structure to me moved or mobilized - IMHO

,tile mastics and thinsets have a hard time drying out between the metal skins and tile

This makes sense, although I wonder if it matters. Thinset doesn't need to dry to be strong and normally steel covered by cement based materials doesn't rust.

Innova Eco Building System located in Miami Florida manufactures product approved James Hardie Board Cement Fiber SIPS (CSIPS. CSIP Panels are available in 4' x 8', 10' and 12' heights.

I suggest that you use tile mastic on the cement fiber board in lieu of thin set for a wall tile installation. The cement fiber board does not absorb moisture like Durock and other common backer boards so you may not get a sufficient bond with the thin set on cement board for a wall tile installation. Thin set is OK for floor tile installations on cement board, but I woulds not use it for a wall tile installation.

Posted By Innova on 11 Aug 2016 10:49 AM
I suggest that you use tile mastic on the cement fiber board in lieu of thin set for a wall tile installation. The cement fiber board does not absorb moisture like Durock and other common backer boards so you may not get a sufficient bond with the thin set on cement board for a wall tile installation. Thin set is OK for floor tile installations on cement board, but I woulds not use it for a wall tile installation.

Thinset is OK for wall and floor tile , I would never advise mastic on floor,
polymer-modified thinsets are flexible and can be used to adhere wall or floor tiles directly to plywood, durock, hardi-Bd, glazed ceramic tiles , VCT and linoleum