I need to replace my cracked garage threshold that has separated from the garage slab and the walls. It is a single car garage with a total area that needs replacing of about 17 inches in width after I will trim the slab to a flat edge with a saw that I will rent.
I have perused this forum and various other 'how to's' online and have gotten some basic understanding what I need to do. I plan on cleaning out the old area and then drilling into the slab where I can epoxy rebar into the original slab and then use a concrete 'cleaner' to make sure the new concrete adheres correctly. I will then build a form out of the asphalt fiber board (reinforced with 2x4's, plywood, etc.) between the asphalt driveway and the new concrete. After originally pouring flush, once the concrete starts to set up, I will scoop some out and create the slop needed to let water drain away.
Now here are my questions:
1. Should I drill and tie into the side walls of the garage that support the walls as well as the slab? If not, how should I treat that joint?
2. Seeing that the original slab is only 5 inches in thick and this new lip will be a high impact point, I was going to pour something thicker than 5 inches. Will this be an issue having the slab thinner? If not how thick should I make the threshold?
3. The asphalt driveway slopes a bit towards the garage as it is old and there is a fair gap (1-2 inches) between it and the foundation for the garage walls. Should I consider cutting into the driveway to take away the sloping section and just extend the threshold out even further (it would require extending the threshold about 5-7 inches more)?
I have posted pictures below and welcome some suggestions. Thanks in advance.
I have perused this forum and various other 'how to's' online and have gotten some basic understanding what I need to do. I plan on cleaning out the old area and then drilling into the slab where I can epoxy rebar into the original slab and then use a concrete 'cleaner' to make sure the new concrete adheres correctly. I will then build a form out of the asphalt fiber board (reinforced with 2x4's, plywood, etc.) between the asphalt driveway and the new concrete. After originally pouring flush, once the concrete starts to set up, I will scoop some out and create the slop needed to let water drain away.
Now here are my questions:
1. Should I drill and tie into the side walls of the garage that support the walls as well as the slab? If not, how should I treat that joint?
2. Seeing that the original slab is only 5 inches in thick and this new lip will be a high impact point, I was going to pour something thicker than 5 inches. Will this be an issue having the slab thinner? If not how thick should I make the threshold?
3. The asphalt driveway slopes a bit towards the garage as it is old and there is a fair gap (1-2 inches) between it and the foundation for the garage walls. Should I consider cutting into the driveway to take away the sloping section and just extend the threshold out even further (it would require extending the threshold about 5-7 inches more)?
I have posted pictures below and welcome some suggestions. Thanks in advance.
