window sill damage inc pic

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octobauk

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hi

i have a damaged hard concrete window sill that needs a repair.

http://tinypic.com/view.php?pic=35bwo7t&s=6

you can see from pic its a mess .

i was wondering if a rebar placed inside holes drilled and lined with adhesive would be adequate.

i have already done a wooden mold surround for a rapid ready mixed mortar.

thx

sorry just noticed i posted in wrong forum
 
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whats the worst that could happen, it cracks again.
i would drill a number of holes for the rebar which i would fix with 2 part epoxy resin to act as the adhesive and the concrete would be fixed in a mould/shutter, probably the same as you have outlined
 
I'd be considering removing the old cill, shuttering out and forming a whole new one. Be just as easy as trying to patch in and probably last longer because it would all be fresh materials.
 
Aye. Personally I'd create a mould and use some grano-to-dust to pour the concrete in. Have a look in the library for the Collins DIY book - they have a lovely picture of how to do this ;)
 
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Don't forget to get some aggrigate in the mix,you can use a bit of sash cord to form a drip, that's my two pennorth
 
Or 1/4" dowelling laid in the bottom of the box 1/2" in from the front.
 
"STOP"!!!! Before you go anyfurther, the round post on the bay windows are probably supporting the upper bay, so before you knock out the old concrete cill get a couple of accro props to support the floor (lay a 3' plank or 4x2 on the floor in front of the bay, stand your accro's on them then another piece of 4x2 on the cieling and wind the accro's up) then carry on and knock out the old cill and pour in the new, i would use half to dust/cement 6:1
 
contact rockbond. I bought their repair mortar to fix a spalled concrete porch. It is better than standard cement for this type of repair. It is easier to work with than resin mixes - you apply it with trowels or you can handle it (with gloves). Make sure you get the latex liquid to prime the existing concrete.
 
htgeng said:
contact rockbond. I bought their repair mortar to fix a spalled concrete porch. It is better than standard cement for this type of repair. It is easier to work with than resin mixes - you apply it with trowels or you can handle it (with gloves). Make sure you get the latex liquid to prime the existing concrete.
Click to expand...


Not only does this sound like a DIY bodge but it also sounds expensive....
 
Thx for all replies

its only a rented property and i will only replace whats broken off without any other impact on the other parts. the landlord i hope would not reject to this because its ghastly to see.

i think just a lack of replacement of paint on window sills over the years left them to get saturated. the previous rebar was rusted and expanded.
 
Don't forget the rain drip groove otherwise damp internal wall ;)
 
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