Cracked concrete window sill

Discussion in 'Misc DIY' started by Ben Aldhouse, Feb 28, 2008.

  1. Ben Aldhouse

    Ben Aldhouse Guest

    Hi

    A sizeable part of our outside bathroom windows sill has fallen off exposing
    the steel reinforcement within. I have no experience at all of working with
    concrete. Is it possible to repair a concrete sill in this condition - or
    would it have to be replaced?

    Ben
    Ben Aldhouse, Feb 28, 2008
    #1
    1. Advertising

  2. Ben Aldhouse

    Palindrome Guest

    Ben Aldhouse wrote:
    > Hi
    >
    > A sizeable part of our outside bathroom windows sill has fallen off exposing
    > the steel reinforcement within. I have no experience at all of working with
    > concrete. Is it possible to repair a concrete sill in this condition - or
    > would it have to be replaced?
    >

    As it is the sill, not the lintel, at least it isn't likely to lead to
    any major structural problems. Like large chunks of wall falling out.

    It sounds like the steel has corroded, forcing off the concrete as it
    expanded.

    In which case, the corrosion is deep seated and will simply force off
    any replacement concrete. Treating the corrosion is going to be nigh on
    impossible. So replacement is the permanent answer.

    I'm assuming that it is a first floor bathroom - lucky the bits of
    concrete falling off didn't hit anyone.. And really, you don't want
    replacement concrete to provide a second opportunity.

    Reinforced concrete is usually a sod to drill - so putting in anchors,
    to give any replacement concrete something to hang on to, is going to
    be hard work.

    Nah, I would probably bite the bullet and replace it. However, I
    obviously haven't seen it, so that is based on my mental image of what
    you have.

    --
    Sue
    Palindrome, Feb 28, 2008
    #2
    1. Advertising

  3. Ben Aldhouse

    Ben Aldhouse Guest

    "alex" <.> wrote in message
    news:...
    > "Ben Aldhouse" <> wrote in message
    > news:_9wxj.22312$%...
    >> Hi
    >>
    >> A sizeable part of our outside bathroom windows sill has fallen off
    >> exposing the steel reinforcement within. I have no experience at all of
    >> working with concrete. Is it possible to repair a concrete sill in this
    >> condition - or would it have to be replaced?
    >>
    >> Ben

    >
    > a diy'er like myself would attempt to repair it, making sure there's no
    > loose or dusty bits before applying a bag of concrete mix (from any of the
    > big diy merchants) with a piece of timber batten or boxing in for a
    > straight edge... while being given verbal abuse by the Mrs for being such
    > a tight b*astard & to 'Do The Right Thing' & replace it!
    >
    > i'm afraid w/o seeing it i can't say but a cause for concern is, if a
    > sizeable part of a steel reinforced lintel exposed to the elements has
    > come off... there might be other problems like damp penetrating. You'll
    > need to find out if the remaining lintel is structurally sound & what
    > other problems there are. Builders merchant sell reinforced concrete
    > lintels for less then a tenner... but taking the old one out & putting a
    > new one in might not be that easy depending on the window & brickwork
    > around it, best to ask someone round to have a look & get 3 quotes. From
    > my experience, windows & doors when done correctly will last a long time,
    > if not damp/cold/wet will penetrare & you'll end up with a much bigger
    > problem next time!
    >
    > alex.


    Thanks for this. I think the idea I had that I could somehow bodge fix it
    has now been laid to rest.

    There is no weather getting in, thankfully. I may not get around to doing
    anything about it for a while but I'll watch it carefully to see if it gets
    worse.

    Ben.
    Ben Aldhouse, Feb 28, 2008
    #3
  4. Ben Aldhouse

    Ben Aldhouse Guest

    "Palindrome" <> wrote in message
    news:ATxxj.375618$...
    > Ben Aldhouse wrote:
    >> Hi
    >>
    >> A sizeable part of our outside bathroom windows sill has fallen off
    >> exposing the steel reinforcement within. I have no experience at all of
    >> working with concrete. Is it possible to repair a concrete sill in this
    >> condition - or would it have to be replaced?
    >>

    > As it is the sill, not the lintel, at least it isn't likely to lead to any
    > major structural problems. Like large chunks of wall falling out.


    Good

    >
    > It sounds like the steel has corroded, forcing off the concrete as it
    > expanded.


    This may be the case. There is exposed steel and it is rusty.

    >
    > In which case, the corrosion is deep seated and will simply force off any
    > replacement concrete. Treating the corrosion is going to be nigh on
    > impossible. So replacement is the permanent answer.
    >
    > I'm assuming that it is a first floor bathroom - lucky the bits of
    > concrete falling off didn't hit anyone.. And really, you don't want
    > replacement concrete to provide a second opportunity.


    Ground floor. No injury occured!

    >
    > Reinforced concrete is usually a sod to drill - so putting in anchors, to
    > give any replacement concrete something to hang on to, is going to be hard
    > work.
    >
    > Nah, I would probably bite the bullet and replace it. However, I obviously
    > haven't seen it, so that is based on my mental image of what you have.


    I am convinced. Thanks very much for your help.

    Ben
    Ben Aldhouse, Feb 28, 2008
    #4
    1. Advertising

Want to reply to this thread or ask your own question?

It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum.
Similar Threads
  1. Rich
    Replies:
    2
    Views:
    516
    Rick Hughes
    Aug 6, 2003
  2. chris n

    Cold window sill

    chris n, Dec 16, 2003, in forum: Misc DIY
    Replies:
    4
    Views:
    1,024
    andrewpreece
    Dec 17, 2003
  3. Housemartin

    Casting concrete sill with no sub sill.

    Housemartin, Aug 17, 2008, in forum: Misc DIY
    Replies:
    0
    Views:
    449
    Housemartin
    Aug 17, 2008
  4. Housemartin

    casting a concrete window sill.

    Housemartin, Aug 20, 2008, in forum: Misc DIY
    Replies:
    1
    Views:
    1,259
  5. Mastermech
    Replies:
    1
    Views:
    512
    bosshogg
    Jan 9, 2014
Loading...

Share This Page