I tried a few different scrapers, putty knives, etc., but I found that a sharp-edged tool like a scraper tended to cut the backer rod because the foam rubber (EPDM, I'm guessing) is quite soft, and I had to push fairly hard, since the rough sides of the grooves resisted squeezing the rod in. An old screwdriver with a slightly rounded edge was a pretty good compromise. It was slow work, but it left the backer rod intact so that none of the low-viscosity self-leveling sealant leaked past it.If you have more to do try a wallpaper scraper to ease the foam in.
but I found that a sharp-edged tool
Agreed, but I found that even an old and very dull scraper/putty knife blade was still narrow enough to cut or damage the soft foam rubber when enough force was applied to squeeze it into the groove. I also tried a well-used and rather dull stone chisel, which sorta, kinda worked, but not as well as the somewhat rounded edge of the old screwdriver, which was just thick enough and dull enough to do the job, and the width was just right for pushing the rod in at about a 45-degree angle across its diameter, as shown in the photo. If I had to install a lot more of these rods, I'd experiment with more tools and different approaches, as I'm sure that there are better ways of installing them. Also, I think closed-cell polyethylene foam backer rods would be easier to install than these soft EPDM rods, but these EPDM rods conform really well to rough surfaces to prevent liquid leakage.Rubbing a tool edge over the concrete a few times will usually dull a blade notably.
Dormer A002 are a good compromise for use in a hand drill. Hold their edge better than HSS but still flexible enough not to shatter easily.Exactly this.
The only thing that does work in a manual drill properly is the dormer jobbers with brazed carbide in the tips.
They are incredible.
Dormer A002 are HSS just Tin coated tip.Dormer A002 are a good compromise for use in a hand drill. Hold their edge better than HSS but still flexible enough not to shatter easily.
Think Id be drilling into the old stuff, and putting some rebar in across the joint!That's it I'm broken now, that was hard work getting the shuttering done on me tod
Glad the boys are coming back to level it properly and lay the readymix thursday
View attachment 499970
Think Id be drilling into the old stuff, and putting some rebar in across the joint!
Think Id be drilling into the old stuff, and putting some rebar in across the joint!
Its getting mesh and a couple of expansion joints but thats it, were on clay so everything moves depending on the time of yearYep, resin in some bits of stud I do then wrap the end sticking out in duct tape. Allows expansion but limits up / down between the old and new slab. Even better have the bit sticking out plain shank and wrap in Denso tape.

Don't send the dog!I made a box from a box and a crude but effectively way to stop the bottom of the box giving out!
View attachment 500111View attachment 500112View attachment 500113
Although I think the supervisor prefers the box in its original form.
View attachment 500119

He obviously thinks he's a cat, with all that getting in boxes malarkeyDon't send the dog!![]()



