Advice: Concrete Expansion Joint for Concrete butted up to Asphalt.

[Tidybuoy]

I need to know if I should use some type of edging beteen concrete and asphalt.

Below picture shows my project (still have to dig a few inches deeper). I'm putting an expansion joint between the garage cement and the new drain cement. I was previously told that I don't need any expansion joint between the cement and asphalt. However, I'm concerned that I won't have a nice clean edge on that side, due to the inperfections in the old asphalt.

Any thoughts? I was thinking of putting a very thin strip of wood (like 1/8 inch) just to create a clean concrete edging and then fill in with asphalt after the concrete hardens. I could also use very thin galvanized flashing since I have some of that laying around.

[GH85Carrera]

Are termites or wood ants a problem there? Wood on the ground is just a buffet for a lot of insects.

[Evans, Marv]

Is the slab on the right in the picture asphalt? It looks like an old concrete slab to me. Maybe it's just how it looks in the photo. If it were me, I think I'd insert some standard expansion joint material between the new concrete and the asphalt(?) slab. Since it seems to be pretty cracked, a layer of the black expansion joint material would give you an easy interface if you decide to replace it later on.

[Tidybuoy]

Originally Posted by GH85Carrera

Are termites or wood ants a problem there? Wood on the ground is just a buffet for a lot of insects.

Yes, termites.

The wood siding in the picture is actually 1" off the ground. The siding is 70 year old redwood and has not had any termite issues. The only termite issues I've had is where a repair was made with douglas fir.

The light blue boards in my photo show some damage at the bottom which is where the old rain gutters down spout exited. These boards are being replaced and the down spout was moved.

[freeform911]

I would have use the deck o drain for the joint. You should be able to find a Styrofoam material that gets put in place and the top 1/2" gets pulled out after the concrete sets, the 1/2 void gets filled with a concrete chalk.
Dont forget to pull the deck o drain up to level with existing concrete /w Slight fall for drainage.

[Tidybuoy]

Originally Posted by Evans, Marv

Is the slab on the right in the picture asphalt? It looks like an old concrete slab to me.

It's asphalt. It is covered in concrete dust from when I epoxyed my garage floor and had a ton of dust from grinding the floor. It's slowly washing/sweeping away.

[Tidybuoy]

Originally Posted by freeform911

I would have use the deck o drain for the joint. You should be able to find a Styrofoam material that gets put in place and the top 1/2" gets pulled out after the concrete sets, the 1/2 void gets filled with a concrete chalk.
Dont forget to pull the deck o drain up to level with existing concrete /w Slight fall for drainage.

Thanks. I did buy a roll of styrofoam expansion joint which I had decided not to use and instead use a 1/2" sturdier expansion joint between the garage and new concrete. I think I will use it on the asphalt side.

I don't want to use the drain for the joint. The manufacturer recommends a min of 4" concrete on each side as well as underneath which will prevent any movement when driving over. Any movement will cause the drain to break over time.

I'm going to sink the drain 1/4" below the new concrete and then slope the concrete to the drain (if that makes sense).

[cabmandone]

I say when in doubt use the expansion joint I don't think you can go wrong using it where it wasn't needed but you CAN go wrong by not using it in a place where it was needed.

[T77911S]

they put a drain in here at work like that. no joint,.
the concrete is stronger than the asphalt if that helps.

not a concrete expert but I would not use one.

[vash]

construction felt board. that's what it is for.

[Borders Reivers]

Swimming pool cool-deck expansion joints. Have them around my house that was built for/by a Los Angeles swimming pool company owner. White PVC kinda stuff. Seems to last forever in the direct sun. Comes in colors too. Some have water drains built-in.

[Tidybuoy]

Originally Posted by vash

construction felt board. that's what it is for.

What is construction felt board? I did a Google search and I come up with hundreds of photos of kindergarden arts & crafts.

[dad911]

Deja Vu? Next Project, seeking advice: Channel Drain

If you can't fix low spot in slab, my comments are below in red:

Originally Posted by Tidybuoy

My garage has sagged over it's 70 year life and water tends to pool up in the front left corner. Water will stay out of the garage until I open the door and then I will have a 1" puddle in the corner about 24-36" diameter. To combat this, I added a garage door threshold that has a 1" bump and this helps a lot.

To really help with this problem, I am going to add a 4" channel drain along the entire front of the garage area of my house. The water will then be routed to a planter bed that has a drain that slopes out to the street.

My Questions:
Directions state that I must have 4" of concrete under the drain and 4" on each side (if cars drive over drain - that's a yes). Should I be adding rebar to this concrete? I would, rebar is cheap It's a small section but want to do this correctly.

My driveway is asphalt. Can use my existing concrete saw blade to cut this or is there a special blade for asphalt? Diamond blade should work fine.

One side of the new concrete will be the cement garage, the other side will be the existing asphalt driveway. What is the best way for framing this newly poured concrete or would you just use the existing edges of the garage/driveway? Since I don't want to create a gap between new concrete and existing (by pulling framing boards out), I was thinking of using something very thin, like galvanized flashing or something. I would pin the new concrete to the old with some short rebar drilled in. On the asphalt side use an expansion joint https://www.homedepot.com/p/Oldcastle-4-in-x-5-ft-Expansion-Joint-65470081/301890380

I'm seeking advice, especially on the last item. I can do pretty much anything but seem to learn a lot from guys that have already done this.

Thanks, in advance...

Originally Posted by Tidybuoy

What is construction felt board? I did a Google search and I come up with hundreds of photos of kindergarden arts & crafts.

See link in my previous reply....

[Tidybuoy]

Thanks, I've got a pack of the expansion joint boards...I had just not heard the term construction felt board. I've followed/following your other advice.

I think it's just a slow Monday - too many Christmas Parties this last weekend. I really just need a nap.