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Replacing a rotten window cill

Discussion in 'Windows and Doors' started by Launchbury, 20 May 2015.

  1. Launchbury

    Launchbury

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    I've removed all the wet rot from our window cill.

    I suppose I should now get a new cill and cut down the length, and just connect it to the existing cill, using glue and screws?

    Thing is, the existing cill is all jaggered and rough (as per the picture) so my new (cleanly cut) cill won't connect tightly, there will be long large gaps along where the old and new meet.

    Is there some sort of filler I should use before applying the new cill so it fills all the voids before I push the new cill on? Or what do I use?

    Any help appreciated.

    Thank you.
     
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  3. honda

    honda

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    Ronseal high performance wood filler is a two part product made for repairing such as your cill. Can be sanded down when set and then painted.
     
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  4. Launchbury

    Launchbury

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    So do I smear the filler onto the extg cill then push my new cill against it, remove the excess filler that squidges out, and put some screws through my new cill into the existing cill to hold it on place?

    Thank you.
     
  5. crank39

    crank39

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    :eek:

    And then it want's to be re puttied and sanded and painted once the putty has dried, probably in 2 months time and then after that effort the unit will blow because of all the banging, I would honestly save your money and put it towards a new window
     
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  6. joe-90

    joe-90

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    I'd use a fibre glass paste personally. Totally waterproof and tough as anything.
     
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  8. Burnerman

    Burnerman

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    It's in a bad way, that one.....I wouldn't mind betting there's some rot below the glass unit too.
    John :)
     
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  9. Launchbury

    Launchbury

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    So do I smear the fibre glass paste against the extg cill, then screw the new cill onto it, wipe off the excess?

    Thanks.
     
  10. joe-90

    joe-90

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    Yes. It'll set like nothing else you'll ever try. It's really handy stuff to have around the house. Sandable too. They make boats out of it so it's pretty watertight.
     
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  11. gregers

    gregers

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    if you dont want to take it back to level across the length,then screw on some timber and resin repair it.
     
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  12. Launchbury

    Launchbury

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    Thanks joe-90, do you have the brand name for this stuff?

    Thanks.
     
  13. DIYnot Local

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