What sealant or flashing tape to fill gap between brick and wall?

[badmojo]

Hi Bunnings Workshop Team,

Our house has a gap between brickwork and upper floor wall. 

Would you really a flashing tape or sealant that is appropriate for this gap?

Thanks

 

[JacobZ]

Hi @badmojo,

Thank you for your question about sealing a gap between the brick and rendered wall on the outside of your home.

I'd suggest you use Sika Concrete Grey Sikaflex Pro+ Polyurethane Sealant. It is a high-quality polyurethane sealant that is perfect for sealing gaps in masonry materials and concrete such as this. 

If you don't already have one, you'll need to pick up a Caulking Gun to apply the sealant. 

You might like to check out How To Silicone a Gap for some guidance, but please note the bead you apply will need to be much thicker than that in this example.

Let me know if you have any further questions.

Jacob

[badmojo]

Thanks for the response @JacobZ. Unfortunately the gaps are too wide for using a sealant. Is there a tape that I could use instead?

[Buddingcloth]

As mentioned by JacobZ.

Application: you should inject the crevice and fill that (big caulking gun or hire an injector and compressor). Don't allow caulk it to overfill or ooze out of crevice. You will need to do the fill at least 2 times, allowing the first to set. This makes the bond more even and flexible with temperature changes. It is important to make a seal which is consistent but doesn't really show itself. It should look like a bead inside the crevice. Some people think it should be touched or wiped to make a smooth finish. You don't need to do this. But 1 thing you must do before applying any beading is use an air gun on a compressor to blow out any rubbish or dust from the crevice before you start. Residual building material and dirt/dust can ruin a seal and allow ants to net.

[JacobZ]

Hi @Buddingcloth, 

Thanks for the additional info. Tt's wonderful to have another experienced member join the Bunnings Workshop community. 

I'd like to extend a warm welcome and encourage you to join in any discussions you are interested in and impart your knowledge and learned experiences where possible.

Jacob

[JacobZ]

Hi @badmojo,

Where the gap is too wide, you should use filler rod stuffed into the crack to act as a backing for the sealant. The sealant can be applied quite wide. You might like to check out Application sealing floor joints on Sika's YouTube channel as an example of it in use.

There are tapes such as CAgroup Byute Flashing Tape that can be used in this application, but it will stand out a lot more than a sealant will.

It's entirely up to you what you choose to do, but my opinion is that the sealant will give a much better look when finished.

Let me know what you think.

Jacob