Just before filling each hole with the expanding concrete repair product use an old spray bottle and spritz the hole with a spray.
Opening hole in concrete wall.
Correct placement of the rebar helps prevent the concrete around openings from cracking from structural loads or shrinkage.
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Drill through each corner of your cutout using a rotary hammer equipped with a masonry bit.
Steel reinforcing bar around openings is a critical structural element of cast in place concrete walls whether they are built with removable forms or insulating concrete forms icfs.
Until now i just figured they weren t ready to knock it out.
Remove loose material from the hole in the wall by probing it with the tip of a screwdriver or blade of a putty knife.
Steel lintels in concrete block walls are placed in the mortar between blocks so the first step will be opening a space for the lintel itself.
You want the concrete surface in each hole to be perfectly clean.
Clean the hole and surrounding area with a wire brush.