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 Post subject: Loft Conversion
PostPosted: Mon Jan 29, 2018 6:15 pm 
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Hi guys,

Total newbie here so be gentle!!

I was wondering if someone could tell me whats involved in removing an existing roof to have a new roof installed for a bungalow upstairs conversion?

So far i have worked out i'd need new attic trusses, floor joists etc just wondering what the maximum span of the joists is etc?

Any help or advice would be appreciated

Thank you


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 Post subject: Re: Loft Conversion
PostPosted: Mon Jan 29, 2018 7:18 pm 
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ollie2018uk wrote:
Hi guys,

Total newbie here so be gentle!!

I was wondering if someone could tell me whats involved in removing an existing roof to have a new roof installed for a bungalow upstairs conversion?

So far i have worked out i'd need new attic trusses, floor joists etc just wondering what the maximum span of the joists is etc?

Any help or advice would be appreciated

Thank you


If you have *attic trusses*, the floor joists will form the bottom chord of the truss - the sizes will be calculated by the truss manufacturer. They will be heavy, it will blow a gale and pour with rain when you try and erect them - it always has for me.

The maximum span of an ordinary joist will depend on it's size, it's likely that you'd need a load bearing wall/beam at the centre unless the property is very small, (as a guide, a 6 X 2 joist will span just over 3.0m).

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 Post subject: Re: Loft Conversion
PostPosted: Mon Jan 29, 2018 7:27 pm 
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We did some with a 10m span and the bottom cord/joist was 10x2 and that was with a load bearer mid way underneath. They also had top hat sections which needed joined on due to height.
These trusses were in the region of 220kg a pop,so really heavy.

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 Post subject: Re: Loft Conversion
PostPosted: Mon Jan 29, 2018 8:21 pm 
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Thanks guys, my span is 10400, however i don't have a wall running all the way through. I do have walls running through but not the same wall continuously


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