Do you have to use RedGard?

You do not need to use the Redgard. Millions of showers have been built with out using a waterproofing. However, the information coming down the pike these days is that a surface water-proofer under the tile eliminates the need for a moisture barrier on the studs and it will extend the life of the facility.

In respect to this, 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.

Also, is waterproofing membrane necessary? A moisture barrier is all that's needed to keep water out of the water cavity. But more extensive waterproofing is required for the horizontal surfaces if you want to prevent a shower from leaking.

Also question is, do I need to use RedGard over Hardibacker?

Either you use a vapor barrier behind the hardi, or you can use a waterproofing system (like redgard) over the hardi, but you should not do both. As Vic mentioned, hardi isn't waterproof, so no sense in being concerned with the seams. Hardi, while not waterproof will not be affected by water. Water will do it no harm.

Will paint stick to RedGard?

RedGard Creates a Waterproof and Crack Resistant Membrane Applying RedGard to any surface is super easy. If you can paint a wall you can use RedGard no problem.

39 Related Question Answers Found

Does tile stick to RedGard?

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 does it take RedGard to dry?

1-1.5 hours

Can I use RedGard on drywall?

It's true that RedGard can be used on drywall, but when all their product information is carefully considered, it is not the case that RedGard can be used on Drywall in a wet area. As far as I can tell, there is no industry standard that supports the use of a liquid membrane on drywall in a wet area.

Can I use RedGard on shower floor?

redgard is not a code approved method of shower pan lining. use cpe liner with pre slope the mud bed then redgard the mud if you want.

Should you put cement board under a tub?

You don't need any cement board under the tub. It is far more important to have a sturdy layer of ply under the tub.

What is RedGard used for?

RedGard Waterproofing and Crack Prevention Membrane is a ready-to-use, liquid formula that creates a seamless waterproof barrier and prevents common cracks from occurring in tile, stone and grout. RedGard is easy to apply and dries quickly.

Do you need to seal cement board before tiling?

Contrary to popular thought, tile and grout are not waterproof, and some moisture will penetrate even if sealant is used. However, if you choose to use concrete backerboard, which is much stronger and more durable than gypsum board, a water vapor membrane must be placed underneath it or a sealant applied on top of it.

Will silicone stick to Redgard?

Apply the RedGard SpeedCoat membrane to the bottom of the flange. When dry, apply an additional coat of the membrane. NOTE: Apply membrane over Silicone Caulk within 3 hours. Membrane will not adhere to silicone when applied on next day.

Do I need vapor barrier behind Hardibacker?

You need to install a vapor barrier to the studs at the very least, and you must alway mud and tape the seams with fiberglass cement backerboard tape. Backerboard is water-permeable, and will not stop moisture from entering the wall cavity.

Which side of Hardibacker goes out?

Cement board has a smooth side and a rough side. Face the rough side out if you will be using thin-set mortar adhesive to install the tile but the smooth side out if you will be using latex mastic.

Is HardieBacker waterproof?

Everything you've come to expect from the most preferred brand of backer board* – exceptional performance, ease of use, and excellent tile adhesion – now with a waterproof composition throughout the board. HardieBacker® 500 Waterproof Cement Board delivers lasting results in less time with no compromise on quality.

Is Hardie backer waterproof?

cement backer board is not waterproof,but water cant hurt it,even when soaked in water for months or even years

Can I use Hardibacker in a shower?

It usually works fine for a kitchen backsplash or fireplace but as a shower tile backer board, it's a bad idea and against code. This also goes for moisture resistant drywall also known as green board.

Do I need to waterproof Hardibacker board?

In fact, it can be submersed under water indfinitely and maintain its structural integrity. However, when a product is characterized as "water resistant," it means it is impermeable, able to repel water. Most concrete backer-boards on the market today are not water-resistant, but all are waterproof.

Should you put a vapor barrier behind cement board?

You still need a vapor barrier with cement board, although in this case the barrier can go behind the board. Cement board is heavy enough and breathable enough to take the moisture without a problem. By having the vapor barrier behind the cement board you stop the moisture going further into the wall.

Can I paint over waterproofing membrane?

Painting your waterproof membrane may not be warrantied, but it is possible. Remember that you will have to use a good quality primer or an all-in-one paint for the best chance at success with your fresh coat of paint.

Does cement board have to be waterproofed?

Cement boards may be classified as water resistant as in not affected by water exposure; however, they do allow penetration and passage of water and water vapor. To waterproof cement boards, a liquid or membrane waterproofing material is applied over its surface.