How do you fill gaps before self-leveling compound?

Use self-leveling compound to fill the remaining sloped gaps.

  1. Spray foam at a guess, but let someone who’s tried the options weigh in with an answer. …
  2. Enlarge the gap by cutting off a slice of the existing sub-base, then fit the larger gaps. …
  3. “Backer rod” is usually used when you’re caulking and need to fill a large gap.

Should concrete expansion joints be filled?

Just remember that expansion joints should always be sealed and filled with a flexible joint sealer and never epoxied or coated over. Contraction joints can be filled in the same manner after a coating or sealer is applied if you desire.

How do you fill expansion gaps in concrete?

Quote from the video:
Quote from Youtube video: You want to place a backer rod a foam cell backer rod in between the expansion joint.

Do you need to seal concrete before using floor Levelling compound?

It is recommended that the concrete surface is primed with a primer before applying the leveling compound. This is meant not only to improve adhesion with the leveling compound but also to serve to seal the concrete slab beneath.

How do you prepare a concrete floor for self-leveling compound?

Quote from the video:
Quote from Youtube video: If any holes dips or cracks in the floor are deeper than the maximum thickness that the leveling compound can be applied to they will need to be filled with a suitable concrete repair compound.

How do you prime a floor before self-leveling?

Quote from the video:
Quote from Youtube video: You need to dilute the primer. So it soaks into the substrate for non porous substrates. There's no need to dilute the primer to be effective.

Does expansion joints need to be sealed?

Expansion joints need to be sealed periodically to protect against water, dirt, and debris. These elements can hurt the structural integrity of concrete over time. Water can also lead to mold and interior leaks that are costly to repair.

Should you caulk concrete expansion joints?

Caulking Concrete Cracks and Expansion Joints

Even expansion joints in your concrete driveway should be caulked. They can be the biggest culprit of water under your slabs. Notice how the caulking is slightly lower than the concrete slab around it.

What is the best concrete joint filler?

Epoxy and polyurea-based joint fillers are two of the most popular filler solutions. They help extend the lifetime of concrete floors and allow them to perform as intended throughout their usable years.

Do I need to PVA before self levelling?

There’s no need to use a PVA before you use a self levelling compound. However, it is advised that you clean and prime the surface before pouring over the cement mixture.

What happens if you don’t use primer before self-leveling?

Self-leveling underlayments require the use of a primer prior to installation (like the TEC Multipurpose Primer). Failure to use product recommended primer may result in installation failure. Primer retains the moisture within the self-leveling underlayment to allow proper curing.

Do you have to prime concrete floor before self levelling?

The floor needs to be primed before adding the floor leveler and you’ll want the primer to soak into the floor, not the dirt and dust sitting on top of it. Keep a marker or roll of tape in your pocket while you’re vacuuming, and mark all the holes or cracks in the wood that will need to be sealed up.

How do you seal the edges of self-leveling compound?

Quote from the video:
Quote from Youtube video: So it doesn't take that long to use i then use great stuff in between the bottom plate. And the wood subfloor to seal any gaps.

How thick can self-leveling concrete be?

QUIKRETE® Fast-Setting Self-Leveling Floor Resurfacer (No. 1249-51) can be installed from 1-1/2 inch (38 mm) thick to a feather edge, although a ¼ inch (6.3 mm) minimum thickness is required for heavy traffic areas.

What primer should I use for self-levelling compound?

After five to six hours, Primer X or any of the MAPEI epoxy sand-broadcast primers can be used to prepare for self-leveling.

Should I PVA concrete before screed?

PVA glue is a good screed adhesive especially if it is mixed with water & cement, to make a slurry. If the concrete base is primed the day before with PVA & water mixed, then a slurry applied prior to screeding, then it is quite reasonable to expect screed to fully bond at just 25mm thick.

Can you use PVA as primer for self Levelling compound?

No to the PVA, but wet the floor first before using the self leveling compound, be warned it’s not self leveling you have to trowel it level. FatHands likes this.

Can you use PVA as floor primer?

No, never use PVA to prime a surface before applying tiles. The acetic acid produced when cement and PVA come into contact would render the adhesive and grout useless.

Will PVA seal a concrete floor?

One of the best products for sealing a concrete floor is PVA.

Can you use PVA to bond concrete?

PVA in Cement and Mortar

PVA can be added to a cement mortar mix to give the mix a) slightly better waterproofing qualities and b) advanced adhesion to the surface it is applied to. Painting a coat of PVA on the surface before the cement mortar is applied can even further increase this adhesion.