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The Daily Insight

How wide is Kerdi membrane

Author

William Taylor

Published Apr 03, 2026

The new size of Schluter-KERDI membrane is 6′ 7” (2 meters) wide, versus a standard roll that is 3′ 3” (1 meter) wide.

How thick is Schluter Kerdi membrane?

KERDI features a polyethylene core with a polypropylene fleece laminated to both sides. The material is physiologically safe and does not require special disposal. KERDI is 8-mil thick and has a water vapor permeance of 0.90 perms, when tested according to ASTM E96, using Procedure E at 90% relative humidity.

How wide is a Kerdi shower curb?

The curb can be used in conjunction with KERDI-SHOWER-T/-TS/-TT shower trays or mortar bases and is available in three sizes, 38″ x 6″ x 4-1/2″ (97 x 15 x 11.5 cm), 48″ x 6″ x 4-1/2″ (122 x 15 x 11.5 cm) and 60” x 6” x 4-1/2” (152 cm x 15 cm x 11.5 cm).

How wide is Kerdi board?

With the available panel thicknesses of 3/16″, 3/8″, 1/2″, 5/8″, 3/4″, 1″, 1-1/2″, and 2″ (5, 9, 12.5, 15, 19, 25, 38, and 50 mm), KERDI-BOARD allows the installer to prepare and create a broad range of substrates and building elements for the installation of ceramic and natural stone tile that are flat, level, plumb, …

Can Kerdi membrane be installed over plywood?

The Kerdi membrane system requires a 2” overlap at all seams; either with the membrane itself overlapping adjacent piece or with the use of Kerdi-Band tape. … Since thin-set mortar works over almost any substrate, the Kerdi system can be used over drywall, plywood, or the various cement boards mentioned above.

Can you put Kerdi membrane over cement board?

Yes,Kerdi can be installed on drywall or cement board. However if installed on drywall it is only protecting one side. … All shower/tub areas should have concrete board (I prefer hardiboard).

Can you overlap Kerdi membrane?

3. Seams can be constructed by overlapping the edges of the KERDI 2″ (5 cm) using Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar, or by abutting the edges and covering the joint with KERDI-BAND using Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar.

Can Kerdi shower curb be cut?

The Schluter®-KERDI-BOARD-SC shower curbs can be cut to length using a utility knife or a handsaw. To modify the height, remove the desired amount from the bottom of the curb using a utility knife.

Why is Kerdi-board out of stock?

We are dealing with a raw material shortage as a result of COVID, and we are unable to source part of the materials required for our Kerdi-Board production.

Can I screw into Kerdi curb?

2 Answers. The kerdi curb won’t hold your screws. You can try putting a screw on a piece of scrap and you should be able to pull the screw out by hand. It is designed to be used at the bottom of the shower door just to hold the tiles and good enough for a person to step on it.

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How wide is a wedi curb?

Order no.DesignationLength x width x thicknessUS3000039Curb5 in. x 4 1/2 in. x 60 in. 127 x 114 x 1524 mmUS3000038Curb, Lean2 in. x 3 1/2 in. x 60 in. 51 x 89 x 1524 mmUS3000041Curb5 in. x 4 1/2 in. x 96 in. 127 x 114 x 2500 mmUS3000040Curb, Lean2 in. x 3 1/2 in. x 96 in. 51 x 89 x 2438 mm

Do I need a vapor barrier behind KERDI?

NO – DO NOT us a vapor barrier behind Kerdi. It is a vapor barrier.

How thick should subfloor be under DITRA?

Proper Floor Preparation However, the plywood subfloor must be thick enough to support the tile floor. This means: A minimum of 5/8” nominal plywood or OSB thickness installed over joists on 16” centers.

Can you put 2 KERDI shower pans together?

Yes. The KERDI-SHOWER- T/-TS/-TT trays can be cut to size to fit various applications. Ideally, the tray should be cut by equal amounts on all four sides to ensure a consistent height of the first course of wall tile. … The shower base can also be extended past the perimeter of the shower tray using dry pack mortar.

How much should a Kerdi membrane overlap?

Make sure that the second sheet of KERDI membrane overlaps the first by at least 2”—you can make sure this is accomplished by marking the sheet 2” from the edge. Alternatively, KERDI sheets may be butted and covered with KERDI-BAND waterproofing strips.

What Thinset do you 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.

Does Thinset stick to Kerdi fix?

Kerdi fix does not stick to thin-set FYI. So if you pre-treated the backs you just ruined the corner.

Can you put Kerdi membrane over drywall mud?

No. It is not necessary to tape the joints between drywall panels before installing KERDI. … Joint compound can be water soluble and should be protected from the moisture in the thin-set mortar used to install KERDI.

How soon can you tile over Kerdi membrane?

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 you use cement board with Kerdi shower pan?

You can use it over drywall. … I still put Kerdi over cement board instead of drywall, even though drywall is an approved backer for Kerdi.

Can Kerdi board be used on the floor?

The material is equally suitable for creating level substrates in floor renovation projects e.g. residential bathroom installations designed for foot traffic. Schlüter®-KERDI-BOARD is simply cut to size with a utility knife. The gridlines printed on the surface are helpful for neat and quick installation.

Which is better wedi vs Schluter?

The Wedi materials are less forgiving and fixes for mistakes in your cuts are not recommended. The Schluter system is more forgiving since you can use the Kerdi band, mortar, offcuts and Kerdi fix to.

Is Kerdi board waterproof?

KERDI-BOARD by Schluter is one of the best ways to waterproof a shower. … A lot of folks like using cement board but it’s heavy and requires a waterproofing membrane over it. Furthermore, if you’r working in an older home KERDI-BOARD fits better than cement board in odd spaces.

How do you fix a KERDI membrane?

Holes can typically be repaired by installing a patch of KERDI or Schluter™-KERDI-BAND with Schluter SET™ , ALL-SET™ , FAST-SET™, or unmodified thin-set mortar, making sure to provide a 2″ overlap in all directions.

Is the Schluter system worth it?

Great product. It takes a little longer than the traditional mud shower bed and water-proofing methods, but it is worth it. … My shower is water-tight, and the sloped floor drains water perfectly. The finished product looks great.

How wide is shower curb?

The width of a shower curb is 36 inches up to 48 inches depending on the size of the shower.

How thick is a Schluter shower pan?

The shower tray, available in a range of sizes with thicknesses from 1-21/32″ (42 mm) to 2-3/8″ (60 mm), eliminates the need for a mortar bed, and is easy to install.

What is the standard height of a shower curb?

The standard shower curb height in the United States is a minimum of 2 inches above the top of the drain. This is building code however it does not mean that the curb itself must be 2 inches high. It means that you must have 2 inches of a drop from where the drain is located to where you step in.

Is Schluter all set waterproof?

Schluter®-Systems offers a variety of systems for tile installation, including uncoupling and waterproofing membranes, shower systems, and building panels. … It is sag-resistant and ideal for setting tile on both horizontal and vertical surfaces.

What is a shower curb?

Shower curbs serve as the border between the floor of the shower pan and the bathroom floor. They keep water in the shower, and sometimes also serve as a base for mounting brackets for a shower door.

What thickness cement board should I use?

Walls: Use 1/2-inch or 5/8-inch-thick cement board, not 1/4-inch. The extra thickness is needed when spanning the studs and it provides a solid base for the tile. Countertops: 1/4-inch, 1/2-inch, or 5/8-inch-thick panels are all suitable for countertops.