How do I repair this (photo included) please?

R101 · Post by **R101** » Fri Mar 06, 2009 2:39 pm

The concrete sill has disintegrated - what would be the best method to restore same?

: concretepercent20damage_144.jpg (196.67 KiB) Viewed 2330 times

Post by **ultimatehandyman** » Fri Mar 06, 2009 3:52 pm

You will never get a perfect colour match, but you can repair it with some repair mortar-

http://tinyurl.com/4xfvkrr

You can clamp a piece of wood on the underside and then fill the hole with the repair mortar and trowel it off flat, then when it has set remove the wood and the clamps.

You may have to fill the hole with a few thinner layers (if it starts to slump) by building it up gradually.

Geewizz · Post by **Geewizz** » Fri Mar 06, 2009 4:16 pm

It would be prudent to cut off a portion of the top so that your fresh mortar wraps around the remaining portion. This will allow a better grip than a repair that only hangs onto the underneath of the existing original.

R101 · Post by **R101** » Fri Mar 06, 2009 6:11 pm

Thanks for the replies and the prudent tip Phil.

Is a 4Kg tub of the Epoxyset enough for that job?

Geewizz · Post by **Geewizz** » Fri Mar 06, 2009 6:19 pm

It depends how much you drop.

4kg should be just enough though.

R101 · Post by **R101** » Fri Mar 06, 2009 7:07 pm

OK - I'll post up a picture of the repair when done.

leebwk · Post by **leebwk** » Mon Mar 09, 2009 8:37 am

Any epoxy mortar will be able to repair that using methods suggested by previous poster but be aware that this was caused by water ingress causing the reinforcing bar to rust and blow the concrete apart so it maybe prudent to check the rest and take a bit of preventative action now such as sealing the over string courses or creating a small flaunch on top to throw the water off

big-all · Post by **big-all** » Mon Mar 09, 2009 10:40 am

as scruff says clamp a bit off wood underneath but i would extend it forward a further 2" this will allow you to not drop so much and allow you to use a further bit off wood as a former

although you wont see much of the repair just remember to use smooth wood as the repair will take on the grain/rough surface off the wood

R101 · Post by **R101** » Mon Mar 09, 2009 10:50 am

thanks for the tips guys - epoxy mortar ordered.

thescruff · Post by **thescruff** » Mon Mar 09, 2009 11:09 am

big-all wrote:as scruff says clamp a bit off wood underneath but i would extend it forward a further 2" this will allow you to not drop so much and allow you to use a further bit off wood as a former

although you wont see much of the repair just remember to use smooth wood as the repair will take on the grain/rough surface off the wood

That was the Boss BA not me

What I would do

is, remove the old completely and make up a new piece using Bath stone or similar, then peg it into place using dowels, and then make good with bath stone dust and white cement.

R101 · Post by **R101** » Wed Apr 08, 2009 8:30 pm

Here is a photo of the repair - thanks again for the help

: Concrete%20repair.jpg (99.02 KiB) Viewed 2316 times

Post by **ultimatehandyman** » Wed Apr 08, 2009 8:41 pm

Well done