How much should a KERDI membrane overlap?

2”KERDI sheets may be joined using a lap seam. This approach allows you to combine membrane installation and joint sealing in one step. 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.

How much overlap does a KERDI membrane have?

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.

How much thickness does KERDI membrane add?

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. KERDI-DS is 20-mil thick and features additives to produce a water vapor permeance of 0.18 perms.

Can you tile over KERDI membrane right away?

Once the KERDI membrane, including seams, corners and protrusions have been completely bonded and, therefore, waterproofed, the assembly is ready to be tiled. No wait time is required. A water test should be performed before setting tile to verify a successful waterproofing installation.

Can you run KERDI membrane horizontally?

Schlüter®-KERDI-BOARD can be installed vertically as well as horizontally.

Can you overlap waterproof membrane?

The end-to-end overlaps of the waterproof sheets must not be arranged along a single line but must always alternate. The sheets must be arranged with overlaps as in tiling a roof, i.e. always starting the overlaps at the drains or the downpipes.

Can you tile over KERDI same day?

How long do I have to wait before I can install tile on Schluter®-KERDI-BOARD? For most installations of KERDI-BOARD, tile can be installed right away.

How long does KERDI membrane need to dry before tiling?

24 hours

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.

What do you put under KERDI membrane?

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.

How long does KERDI take to cure?

Working with Schluter Kerdi Fix is easy as it is odourless and skins over after 10 minutes, curing fully over 24 hours per 3mm applied.

Does KERDI need to go to ceiling?

KERDI application on the ceiling is optional for showers and bathtub surrounds but required on the ceiling for enclosed showers. For intermittent use steam showers, KERDI must be applied to walls and ceilings. For continuous use steam rooms, KERDI-DS must be applied to walls and ceilings.

How much do you overlap roofing membrane?

Ensure that each layer overlaps by 1cm – 2cm as you work your way up the roof. Where the membrane meets a chimney, cut around it to create flaps and ensure the overlap goes up flush against it.

Why do waterproofing membranes fail?

Many waterproofing membranes deteriorate over time due to exposure to UV rays, harsh environments, aggressive groundwater or permanent ponding, leading to the disintegration of the waterproofing layer and thus the failure of a membrane.

How long does KERDI last?

Does the Schlüter®-KERDI last a lifetime? For many of our products, sustainability is key and we ensure that all of the materials that we use are built to provide the waterproofing you need for a long time. With our products, you can expect for them to last for upwards of fifty years.

Can you waterproof and tile same day?

It is not unusual to hear of a water-based membrane being applied one day and tiled the next day. However, the majority of water based waterproof membranes require a minimum of 48 hours prior to tiling.

What is the best thinset to use with KERDI?

Schluter's recommendation is to use unmodified thinset mortar when installing Kerdi over most shower substrates.

Is KERDI really waterproof?

Schluter®-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities.

Can KERDI go over drywall?

• Yes. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower.

How do you overlap roof membranes?

Here this lap the membrane will extend beyond the thickness of the batter. It could therefore come into contact with the back of the tower.

Should roof membranes be tight?

• Never pull your roof membrane under tiles too tight

  The ideal measurement of this will sit between a minimum of 10mm and a maximum 15mm. If the membrane is taught, there is risk of tearing and the water could become trapped behind the tiling batten.

When waterproofing is installed incorrectly?

Incorrect waterproofing

Correct installation is key when it comes to waterproofing. Many leakage problems are caused by poor waterproofing, which can result in moisture. If the waterproofing is done incorrectly, the building can degrade much quicker due to the moisture build up.

How thick should waterproofing membrane be?

The waterproofing membranes we are discussing are composed of thin layers of waterproof material, 2 to 4mm thick. There are sheet membranes, i.e. they are supplied in a premade layer, and there are liquid applications.

How many coats of waterproof membrane?

Bathroom waterproofing is applied before tiles are laid, using a combination of sheet and paint-on liquid membranes. Two coats are needed, each taking 24 hours to dry. Extra sealant may also be needed once the tiles are down. It's a job that can take up to four days, so allow plenty of time.

Can you tile directly over waterproof membrane?

ANSWER – Ceramic tile can be adhered directly to certain types of waterproof membranes, which are designed for ceramic tile or stone. A roof that has a concrete substrate, over interior occupied space, can have ceramic tile or stone installed on top of it.

What trowel do you use for KERDI membrane?

What size notched trowel should I use to install Schluter™-KERDI? A 1/4" x 3/16" (6 mm x 5 mm) V-notched trowel or the Schluter™-KERDI-TROWEL is recommended.

Why does KERDI require unmodified thinset?

Portland cement-based unmodified thin-set mortars are dependent on the presence of moisture for hydration in order to gain strength. Since KERDI is impervious, it does not deprive the mortar of its moisture. This allows the cement to properly hydrate, resulting in a strong, dense bond coat.