H Strip ceiling repair?




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  1. #1
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    Default H Strip ceiling repair?

    We did an add on to a bedroom. I assume some settling caused one side of the ceiling H strip to come loose. How do I repair this?
    It seems that a larger H strip may be required to close the 1/4 " gap, can one get different width H strips?
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    Default Re: H Strip ceiling repair?

    Quote Originally Posted by Chuckzoo View Post
    We did an add on to a bedroom. I assume some settling caused one side of the ceiling H strip to come loose. How do I repair this?
    It seems that a larger H strip may be required to close the 1/4 " gap, can one get different width H strips?

    Ag thanks!



    The H-strip is called a Alustrip but many guys refer to it as a Bischoff Strip because years ago a company called Bischoff made them.

    The strip is largely, but not purely, cosmetic.

    No one can advise without seeing some pictures (not that it would stop them).

    I strongly suspect that when they extended, one or more of the following happened (please let me know how many I get right):

    • The Builder who did the extension did the ceiling.
    • They did not replace the entire ceiling, they just added the extra bit.
    • You got a few quotes & took the best (cheapest one).
    • When they extended, the trusses on the added bit were added running at right angles to the original trusses, but all the boards (new & old) run in the same direction.



    PS... Dont forget a few pictures please...



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    Default Re: H Strip ceiling repair?

    • The Builder who did the extension did the ceiling. Yes
    • They did not replace the entire ceiling, they just added the extra bit. Everything was new, so yes entire ceiling was new.
    • You got a few quotes & took the best (cheapest one). Not a chance!
    • When they extended, the trusses on the added bit were added running at right angles to the original trusses, but all the boards (new & old) run in the same direction. Nope all trusses running in the same direction as the original.
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    Default Re: H Strip ceiling repair?

    Manny, you are slipping, bud... Need to up your game, sir.
    Cheers,
    John

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    Default Re: H Strip ceiling repair?

    Quote Originally Posted by Chuckzoo View Post
    • The Builder who did the extension did the ceiling. Yes
    • They did not replace the entire ceiling, they just added the extra bit. Everything was new, so yes entire ceiling was new.
    • You got a few quotes & took the best (cheapest one). Not a chance!
    • When they extended, the trusses on the added bit were added running at right angles to the original trusses, but all the boards (new & old) run in the same direction. Nope all trusses running in the same direction as the original.
    You forgot about the pictures part of Manny’s post.

    where is the pictures?

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    Default Re: H Strip ceiling repair?

    Quote Originally Posted by JohnnoK View Post
    Manny, you are slipping, bud... Need to up your game, sir.
    Yes...

    But at least I know why it's sagging!

    Now to wait for the pictures.

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    Default Re: H Strip ceiling repair?

    Quote Originally Posted by Mad Manny View Post

    Ag thanks!

    Well done. You did it. Happy now?
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    Default Re: H Strip ceiling repair?

    I will post pictures as soon as I get them.
    Last edited by Chuckzoo; 2018/05/18 at 04:49 PM.
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    Default Re: H Strip ceiling repair?

    Quote Originally Posted by Chuckzoo View Post
    I will post pictures as soon as I get them.

    I have pushed up against the ceiling and it seems to be secure on either side of the H strip.
    How far has it dropped from true? 2cm, 5cm, more?
    How long has it been like that?
    When you push it up, can it easily go back to position?

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    Default Re: H Strip ceiling repair?

    Quote Originally Posted by Mad Manny View Post
    How far has it dropped from true? 2cm, 5cm, more?
    How long has it been like that?
    When you push it up, can it easily go back to position?
    Probably at 5cm now, it seems to be getting progressively worse, as it started as a small gap that I thought just needed chalking. The ceiling seems secure on either side.

    No, it won't go back into the Alustrip when pushed, that's why I thought it needs something larger in order to secure it.
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    Default Re: H Strip ceiling repair?

    Quote Originally Posted by Chuckzoo View Post
    Probably at 5cm now, it seems to be getting progressively worse, as it started as a small gap that I thought just needed chalking. The ceiling seems secure on either side.

    No, it won't go back into the Alustrip when pushed, that's why I thought it needs something larger in order to secure it.

    Right - it probably wont go back.
    But this is what you do.
    I'm assuming this board has a Alu strip on either side.
    I'm also assuming the board is less than 3.0m long.
    I'm assuming because data is scant!

    OK.
    Get two step ladders (we use stands with a plank, but ladders may work)
    Get another person.
    Get a box of 25mm drywall screws and a battery driver to screw them in with.
    Get 4 scrapers about 100mm wide, not the narrow ones.
    With a long level mark the lines where the screws must go (where the brandering is).

    Then go to the ends of the board where it is still OK & put 5 evenly spaced screws through the board on each cross batten (brandering).
    Do this on either end.
    This is to secure the board so it doesn't fall on your head.

    Next, force the two Alu-Strips onto the existing boards as far as you can.
    You want to maximize the gap between the strips as you are going to force a 1200mm wide board into a 1180mm gap.
    Make sure the strip is as far onto the opposing board as possible.
    We take a bolster (flat chisel) & put it in the strip & hit it with a hammer.
    Then put a screw into the existing (non saggy) boards, on the batten, about 2mm from the strip.
    This must be so close to the strip that the head of the screw misses the strip by 0.2mm.

    The H strip (Bischoff Strip) is wider at the top than the bottom.
    The screw secures the strip so it doesn't move & reduce that 1180mm opening.
    Use about 6 screws - 3 each side (on the opposing boards).

    Now try pull as many nails out the sagging board as possible.

    Then check that there's no dead rat, wire or rubbish between the boards & batten that may ruin your day.

    Now you and the other guy get on the steps facing one another.
    Get your head against the board, place your one hand on the edge of the board on the one side.
    Have the scraper in your other hand.
    The screws must be in your mouth (about 5) & the driver, all ready, in your pocket.
    Now with your heads, the two of you slowly lift the the board on the scraper side & using the scrapers force it into the strip.
    Your free hand must pull the BOARD down until it is in the strip on the other side.
    Then you jerk & force it into the strip as far as it will go.

    You now are exhausted & only have one side in.

    Now comes the difficult part - I may add we never do this repair - we quote on a new ceiling - it's cheaper.

    Now lift the other side, as the board meets the strip, violently smack that junction with the scraper to force the board into the strip.
    DO NOT push the center of the board up, the lower it hangs the better.,
    There should be lots of drama, dust & sore hands.
    It's like refitting a bicycle tyre on the rim, you need to shoe horn it in.

    Around about now, you have back & neck pain & have probably swallowed a screw or two.
    You two must work as a team.

    Once the board pops into the strip push the board up with your heads & add screws - 3 - 5 per batten.

    Patch the screw heads (NB Screws must be fastened until the screw head starts to break the board surface, do not over fasten.) with PolyFilla (we used Rhinobed, but Polyfilla is fine).

    Once the Polyfilla is dry, sand it lightly, wipe the ceiling down & paint it with a good quality PVA.

    However, it is HIGHLY UNLIKELY that you will pull this off & it's VERY LIKELY the board will break.
    So rather just call a ceiling contractor in to replace the ceiling.

    Have fun!
    Last edited by Mad Manny; 2018/05/18 at 05:59 PM.

  13. #12
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    Default Re: H Strip ceiling repair?

    Quote Originally Posted by Mad Manny View Post

    Right - it probably wont go back.
    But this is what you do.
    I'm assuming this board has a Alu strip on either side.
    I'm also assuming the board is less than 3.0m long.
    I'm assuming because data is scant!

    OK.
    Get two step ladders (we use stands with a plank, but ladders may work)
    Get another person.
    Get a box of 25mm drywall screws and a battery driver to screw them in with.
    Get 4 scrapers about 100mm wide, not the narrow ones.
    With a long level mark the lines where the screws must go (where the brandering is).

    Then go to the ends of the board where it is still oke & put 5 evenly spaced screws throw the board on each cross batten (brandering).
    Do this on either end.

    Next, force the two Alu-Strips onto the existing boards as far as you can.
    You want to maximize the gap between the strips as you are going to forge a 1200mm wide board into a 1180mm gap.
    Make sure the strip is as far onto the opposing board as possible.
    We take a bolster (flat chisel) & put it in the strip & hit it with a hammer.
    The put a screw into the existing (non saggy) boards, on the batten, about 2mm from the strip.
    This must be so close to the strip that the head of the screw misses the strip by 0.2mm.

    The H strip (Bischoff Strip) is wider at the top than the bottom.
    The screw secures the strip so it doesn't move & reduce that 1180mm opening.
    Use about 6 screws - 3 each side (on the opposing boards).

    Now try pull as many nails out the sagging board as possible.

    Then check that there's no dead rat, wire or rubbish between the boards & batten that may ruin your day.

    Now you and the other guy get on the steps facing one another.
    Get your head against the board, place your one hand on the edge of the board on the one side.
    Have the scraper in your other hand.
    The screws must be in your mouth (about 5) & the driver, all ready, in your pocket.
    Now with your heads, the two of you slowly lift the the board on the scraper side & using the scrapers force it into the strip.
    Your free hand must pull the BOARD down until it is in the strip on the other side.
    Then you jerk & force it into the strip as far as it will go.

    You now are exhausted & only have one side in.

    I'm already exhausted from reading this, however will press on!

    Now comes the difficult part - I may add we never do this repair - we quote on a new ceiling - it's cheaper.

    Now lift the other side, as the board meets the strip, violently smack that junction with the scraper to force the board into the strip.
    DO NOT push the center of the board up, the lower it hangs the better.,
    There should be lots of drama, dust & sore hands.
    It's like refitting a bicycle tyre on the rim, you need to shoe horn it in.

    Around about now, you have back & neck pain & have probably swallowed a screw or two.
    You two must work as a team.

    Once the board pops into the strip push the board up with your heads & add screws - 3 - 5 per batten.

    Patch the screw heads (NB Screws must be fastened until the screw head starts to break the board surface, do not over fasten.) with PolyFilla (we used Rhinobed, but Polyfilla is fine).

    Once the Polyfilla is dry, sand it lightly, wipe the ceiling down & paint it with a good qualiy PVA.

    However, it is HIGHLY UNLIKELY that you will pull this off & it's VERY LIKELY the board will break.
    So rather just call a ceiling contractor in to replace the ceiling.

    Have fun!
    Thanks Manny for the detailed instructions.

    I will print out your instructions and tape them to the ceiling - for encouragement - seems like we will need a lot of that.

    All jokes aside, I will give it my best shot. I have an offer on the house and would like to leave it in good nick for the purchaser.
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