What’s the difference between modified and unmodified thinset?

What’s the difference between modified and unmodified thinset? Unmodified thinset has been around forever. Unlike unmodified mortar, which consists only of a blend of Portland cement, sand, and water retention agents, modified thinset includes additional retention products, such as latex polymers, which can increase its performance and strength.

What happens if you 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.

Do you use modified or unmodified thinset for Ditra? To set DITRA over concrete or gypsum, Schluter-Systems recommends an unmodified thin-set mortar meeting the requirements of ANSI A118.

Can you use unmodified thinset on porcelain tile? Just to clarify Danny’s answer; You need to use a modified thinset with porcelain. The only time you can use unmodified is when the manufacturer of an associated system advises to use something else such as with Ditra and Kerdi installations. So unless you’re going over such a system, you have no choice.

What’s the difference between modified and unmodified thinset? – Related Questions

Can I use modified thinset under Kerdi?

In general, modified thin-set mortar is not recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. Modified thin-set mortars must dry for the polymers to coalesce and form a hard film in order to gain strength.

Can I use modified thinset with Schluter?

Schluter-Systems requires the use of Schluter SET™ , ALL-SET™ , FAST-SET™, or an unmodified thin-set mortar meeting the requirements of ANSI A118. In general, we don’t recommend the use of modified thin-set mortar to set tile over the membranes because these mortars must air dry to cure properly.

Can you use modified thinset over redguard?

Moreover, the Flexbond modified thinset (sold at HD, for example) specifically lists redgard as one of the surfaces it can be applied to and therefore, following manufacturer recommendations, a person should be using a modified thinset like flexbond over Redgard.

Can you mix modified and unmodified thinset together?

Unmodified thinset has been around forever. More than that, you don’t have to mix some types of modified thinset with water before spreading it out on the subfloor. That translates into less work for you and sturdier concrete for the client.

Is Versabond a modified thinset?

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 Mapei thinset modified?

Ultraflex 2 is a professional-grade, single-component, high-performance, polymer-modified thin-set mortar for interior and exterior installations of ceramic, porcelain and dimensional natural-stone tile. This mortar has a high content of unique dry polymer, resulting in excellent adhesion to the substrate and tile.

Should I use Ditra over concrete?

Yes, writes Doug McEvers, Ditra will insulate the concrete slab from the tile and lower the potential for thermal storage. “There is nothing wrong with tile laid directly on concrete providing all precautions are taken regarding moisture proofing,” he says. “Tile and grout work loose if the underlayment flexes.

How long does it take for unmodified thinset to cure?

It usually takes 2-28 days for thinset to fully cure but make sure to defer to curing times provided by the manufacturer for the thinset you’re using in your project.

How thick should mortar be for porcelain tile?

The terms thinset cement, thinset mortar, dryset mortar, and drybond mortar are synonymous. This type of cement is designed to adhere well in a thin layer – typically not greater than 3/16th thick. For example, a 3/8″ notch trowel will produce a 3/16th inch thick coating after the tiles are pressed in to the cement.

What thinset do I use with Kerdi?

Schluter SET™, ALL-SET™, FAST-SET™ or an unmodified thin-set mortar must be used to construct all KERDI seams to ensure watertightperformance of the system.

What is the best thinset for shower floor?

For large tiles, you are going to want to use an unmodified thinset that specifically says it’s ok for large tiles. The one I prefer is Bostik Ditra-set. It can be used for any size tile and works great with Schluter products.

Is unmodified thinset waterproof?

Since Kerdi is waterproof, the water would take days to leave and the mortar wouldn’t set for days or even longer. It might also wash away the first time the shower was used if it hadn’t set properly. Like concrete, the longer it stands the stronger the unmodified mortar bond gets..

How long does thinset take to dry under Ditra?

Subsequently, drying takes place only through the tile joints. Unmodified thinset is a mixture of Portland cement which actually requires moisture to form a strong bond and achieves final set usually within 24 hours.

Is uncoupling mortar the same as unmodified?

Uncoupling Membrane Mortar is an unmodified, dry set, medium bed mortar that was created for use with uncoupling membrane and waterproofing membrane.

Can you tile directly on RedGard?

For tile installations bonding directly to the substrate; strongly recommended to apply at least one full coat of “undiluted” RedGard® to the “dry” primed area and allow to dry completely before tile installation work is to begin. When used as a vapor barrier, apply one full coat (70 sq. ft.

Can I use thinset for shower floor?

Because thinset is not affected by moisture, it is best for floor tile and any tile in wet areas, including shower floors, walls, and ceilings and tub surrounds.

Do you need to use RedGard over cement board?

As long as it’s Cement Board & not some crappy “almost” cement board stuff. You really don’t need the RedGard, but the more protection the betterso go for it. And yes, you can do the boards beforehand. But, hit the filled seams & screws (your weak points) as soon as a panel is ready to give it some time to setup.

Can I use thinset as grout?

Thinset mortar, commonly used for securing stone to a surface becomes very hard just as a Portland cement grout becomes as it dries. Although the intended use for thinset is not for mortar joints. You can use it on backsplashes and other surfaces that will not see heavy traffic.

Is Versabond a good thinset?

Versabond makes reliable yet affordable thinset mortar, which is why it’s a mainstay in the home improvement world. So, if you’re worried that you won’t get a good bond or that you’ll have to redo your mortar after using Versabond, don’t be. In most cases, Versabond is a great pick.

Can I use mortar instead of thinset?

Thinset is an adhesive cement used to secure floor and wall tiles to concrete surfaces. The word “thinset” is sometimes used interchangeably with “mortar,” because it’s a type of modified mortar made specifically for tile.

What is the purpose of Ditra matting?

Waterproofing – DITRA Matting creates a waterproofing assembly with the tile layer, as long as the joints, floor to wall transitions and connections to building fixtures are properly installed.