Which Thinset for Kerdi?

Unmodified thin-set mortar is recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. Portland cement-based unmodified thin-set mortars are dependent on the presence of moisture for hydration in order to gain strength.

Subsequently, one may also ask, can I use modified thinset on Kerdi?

Modified thinset mortars aren't recommended for use with Kerdi because they must dry out to gain strength, whereas the membrane inhibits drying, which can lead to unpredictable results. For example, if a shower is used before the mortar has cured properly, leaks and polymer leaching can occur.

Similarly, is unmodified thinset waterproof? All portland based cementious products will allow water to pass through. The latex modified is more resistant due to the latex that is mixed in with the adhesive but that doesn;t make it "waterproof". The latex also allows a bit more flex in the tile and substrate. As Jason described, thinset itself isn't waterproof.

In this way, which thinset to use with Ditra?

For example, to set DITRA over plywood or OSB, a modified thin-set mortar meeting the requirements of ANSI A118. 11 is used. To set DITRA over concrete or gypsum, Schluter-Systems recommends an unmodified thin-set mortar meeting the requirements of ANSI A118.

Should I use modified or unmodified thinset?

It's important to note that latex-modified thinset can still be used between the membrane and the subfloor because it is not impervious. However, unmodified thinset should be used between the membrane and the tile.

What happens if you use modified thinset on Ditra?

The problem with using a modified thinset is that it takes forever to dry over Ditra, especially with porcelain tile, being that it has an impervious barrier above and below. Schluter has said that if you use a modified thinset to set the tile that you can have to wait as long as 7- 10 days JUST TO GROUT.

Can I use thinset over redguard?

You''ll be fine with thinset over Redguard on walls. It's recommended for waterproofing niches, shelves, and entire shower walls when tar paper or poly are not used as a vapor barrier behind the CBU.

How long should Kerdi dry before tiling?

Wait 24 hours after the membrane (i.e., Schluter®-KERDI-BAND and Schluter®-KERDI) installation is complete to allow for the final set of the mortar and to ensure waterproof performance of the assembly at seams and connections before water testing.

Can tile be removed from Kerdi membrane?

In the worst case, it's OK to cut the Kerdi, remove the damaged section, scrape up the thinset from the areas, and set a new piece of Kerdi. A pain, yes, but the installation won't suffer performance-wise. Only took 45 minutes or so to remove the 9 tiles.

Is VersaBond Thinset unmodified?

VersaBond® Professional Thin-Set Mortar. A professional formula, all-purpose mortar, polymer-modified to provide good bond strength for floor and tile projects. VersaBond® cures quickly even in cold climates and adheres to most surfaces, exceeding ANSI A118.

Is VersaBond a modified thinset?

The Custom Building Products VersaBond 50 lbs. Fortified Thin-Set Mortar is a professional formula, all-purpose mortar, polymer-modified to provide good bond strengths. VersaBond cures quickly and adheres to most surfaces.

How fast does Thinset set?

The humidity, temperature and air flow in a room affect how long it takes to dry, but thinset generally is cured and ready to walk on or grout in 24 to 48 hours. Some installers and home specialists recommend waiting 72 hours for tiles applied to floors.

What happens if my Thinset is too wet?

But in non-freezing conditions, properly mixed and installed thinset will not be harmed by water for many decades. You need water to mix thinset and make it just right, but TOO MUCH water - or adding water if it gets stiff - can RUIN the thinset!

How runny should Thinset be?

Mix your thinset mortar and water until it has the consistency of a thick peanut butter. Don't be afraid to add more water or mortar to get it right. The consistency is very important. You know you have it right if the mortar on your trowel doesn't drip off but can be shaken off.

Is kerabond modified or unmodified?

Dry-Set Mortars. Floor Tile Mortar is a dry-set (non-polymer-enriched or “unmodified”) mortar for installing floor tile in thin-set applications. Kerabond is a premium-grade dry-set mortar for use in most interior, exterior, residential and light commercial floor and

What if Thinset is too thin?

However, it does meet the minimum requirements of A118. 1 for unmodified thinsets, so, it should work. Since you mixed it too thin and spread it with the wrong trowel, it will take longer to set up. BUT, mixing it too thin also makes it weak.

What size notched trowel for Kerdi membrane?

Cut KERDI to size prior to application. 2. Apply thin-set mortar to the substrate using a 1/4" x 3/16" (6 x 5 mm) V-notched trowel or the KERDI-TROWEL, which features a 1/8" x 1/8" (3 x 3 mm) square-notched design (Note the open time of the mortar).

How much thinset do I need for Ditra?

To bond tile to DITRA, using a 1/4" x 3/8" (6 mm x 10 mm) square- or U-notched trowel: Use one 50 lb (22.68 kg) bag of mortar per 40 - 50 ft2 (3.7 - 4.6 m²). To bond tile to DITRA-XL, using a 1/4" x 3/8" (6 mm x 10 mm) square- or U-notched trowel: Use one 50 lb (22.68 kg) bag of mortar per 35 - 45 ft2 (3.3 - 4.2 m²).

Can I mix half bag of thinset?

Mixing thinset isn't rocket science and doesn't have to be mixed to exact proportions. If you eyeball a portion of a bag and it's too thin - add a little more thinset, if it's too stiff - add a little water.

Can I use unmodified thinset on plywood?

?Thinset is the wet base that you first trowel on the plywood to make the tile stick. Higher latex content is essential for bonding to plywood. A quality unmodified thinset should be used and mixed with a latex additive. One example would be to use Laticrete's 317 thinset mixed with Laticrete 333 liquid latex additive.

Is fortified Thinset the same as modified?

Latex modified usually refers to the multipurpose thin-sets that are 118.4 compliant that are mixed only with water. A latex fortified thin-set is a dry set (118.1) that is fortified with an additive (such as 317 mixed with 333 super flexible additive) that makes it 118.4 compliant.