Cut Roof Support

vivyorks · Posted: Wed Jul 05, 2006 8:20 pm Post Subject: Cut Roof Support

My house is 45 years old mid terraced.In the loft space, one of the long wooden supports that runs horizontal then into the walls at each end, has a diagonal cut in it.Looks like it was a way of joining the timber together.There is now a gap appearing between the cut.The roof from the outside is now sagging.What can I do?Asked insurance company but they say it`s a falt when the house was built.I don`t have any spare money, so need a cheap way of stopping it getting worse.Thanks.Viv.

Static · Posted: Wed Jul 05, 2006 8:37 pm Post Subject:

Photos ??

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vivyorks · Posted: Thu Jul 06, 2006 9:22 am Post Subject:

I will take some photos and put them on.
Viv

Static · Posted: Thu Jul 06, 2006 11:27 am Post Subject:

Take pics of the external sag, the cut joist and the overall roof.

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Nige F · Posted: Thu Jul 06, 2006 6:26 pm Post Subject:

It`s a Purlin ....and the cut should be zig zag.....scarf cut.............good chance it can be braced to stop furter sag........no need to worry too much

vivyorks · Posted: Mon Jul 10, 2006 6:17 pm Post Subject:

Hi there,
Sorry I have been so long replying. I dropped the camera, breaking it, so I had to then borrow one. Then the PC crashed on me! Not my week...Oh well here it is.[/img]
Errr. How do I attach the pic?
Viv.[/img]

Mw Roofline · Posted: Mon Jul 10, 2006 9:02 pm Post Subject:

You need someone to host the pic for you and then you can link it to this site. www.photobucket.com is free. Once uploaded, copy the URL with the [IMG] tags around it straight into the reply box

vivyorks · Posted: Tue Jul 11, 2006 11:01 am Post Subject:

Thanks Mw Roofline,
Hope I have done this right.

and

Hopefully thats right!!
Will be grateful for your opinion.
Viv.

masona · Posted: Tue Jul 11, 2006 12:41 pm Post Subject:

Right, straight forward to do, 2 length of 8" x 2" on top & bottom of the purlin, coach bolts with timber connectors and square metal plate both side, you will not be able to bend back the purlin but this will make stronger and prevent any more movement, make sure the bolts are long enough to allow for tightening with the timber connectors. Can you also do another photo as I can't see any strut supports for the purlin and what is the length of the purlin?

Staggered the bolts so it's not in line

then use plate washer

8"x2" timber and timber connector in between the timber

and the same on the other end

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JohnD · Posted: Tue Jul 11, 2006 1:17 pm Post Subject:

OOI, Masona, that cut looks fairly fresh. Is it unusual to have a cut like that with nothing underneath it to support the join?

masona · Posted: Tue Jul 11, 2006 1:23 pm Post Subject:

No, I have seen many purlins like that

Normally people removed the supports 'cos they are in the way

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JohnD · Posted: Tue Jul 11, 2006 1:25 pm Post Subject:

Not unusual then, but not a good idea?

vivyorks · Posted: Tue Jul 11, 2006 9:26 pm Post Subject:

Thanks Masona,
That is a great help. I cannot take any more pics as I broke my camera getting out the loft last time!! The purlin is the width of the house, 17ft. As far as I know the cut has been there since the house was built. There are two supports about 4ft away from each end wall. They are 2inx1in and dont look like they are doing much good, they are screwed in with just one screw in the purlin and one in the joist.
The roof from the front of the house does look like there is a sag in the middle.
Viv.

masona · Posted: Wed Jul 12, 2006 5:28 am Post Subject:

vivyorks wrote:

The purlin is the width of the house, 17ft. As far as I know the cut has been there since the house was built.

That's okay, get the longest length of 8"x2" as possible.

Quote:

There are two supports about 4ft away from each end wall. They are 2inx1in

Run another 4"x2" on the side of the 2"x1"and notched over the purlin.

Quote:

The roof from the front of the house does look like there is a sag in the middle.

You're not alone, my roof sag about 100mm in the middle but it won't be going anywhere now

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vivyorks · Posted: Wed Jul 12, 2006 12:59 pm Post Subject:

Hi Masona,
Just had another look at the purlin. The place where it is cut has twisted a bit and looks like fixing will be difficult. It has also had a screw put through the cut from the underneath going upwards. You can see part of the screw in the opening that has now appeared. When you say attach the wood to the purling, do you mean from the front to the back? If I go upwards I would need a bolt a foot long! The purling is 6"x3", should I get the wood the same size and attach it to front and back? You obviously know what your talking about and I am grateful for you letting me pick your brains like this

I just want to make sure I`m following your instructions right. Also, do you think this is a job I can do? I am a woman but not frightened to get stuck in.
Viv.