Romoving roof trusses.

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Hi
Looking for a bit of advice before I call out roofing companies etc.

I have a double garage and would like to utilise the roof space above for a games room or office with a staircase rather than hatch opening.

Currently the roof is trussed and I would like to remove the trusses and add steels with a new floor.

Will the roof need to come off or can I add steels and then remove the trusses. I would like to lower the floor approx 700mm to give a bit more head space upstairs so the new floor wouldn't need to be supported form the roof.

Plan is (i have no idea if doable) Add steels and joists/hangers 700mm lower than original floor to hold a new floor, add more beams/structure to the roof and then remove the trusses.











So ideally I want to achieve this....



The garage is 7m x 6.5m and detatched from the house.

I am hoping to get panning permission to build an extension to the house that joins to the garage allowing access up to the games room from the house via stairs and to the garage by a door.

Any help appreciated. If possible what would the approx cost be to achieve this in terms of materials and time

Thanks
 
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Why would you want to mess about inside that - ducking, bending, propping, when it's all got to be changed anyway?
 
Thanks both

Would it be one long steel the length of the floor and then joists from that to the walls. Any ide what depth this would need to be so we I can work out heights. I could add a pillar inside the garage if that would make it easier.

Would it need steels in the roof or because it won’t be taking a floor load can it be reconfigured somehow. Obviously will need additional support for the roofs weight

Woody- not sure what you mean. I want to change the roof space to allow for a room above. Is there a different way to do it?

Thanks.
 
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Is there a different way to do it?
Yeah. Scaffold around it, take the roof off, construct the new roof a lot easier and quicker.

You can't guess it. You will need the new timbers properly sized and calculated and likewise for any beams.
 
Thanks
I was hoping I could do this without removing the roof. I've seen videos where they just added uprights to the left and right and then remove the trusses even when it is holding the floor weight. Not going to risk doing that and will get someone to take a look and advise though :)
 
There was a guy a few years back had a loft conversion
done from a truss roof with all the propping and adding timbers. He wasn't happy it was shaking when it was windy.
 
Thanks
I was hoping I could do this without removing the roof. I've seen videos where they just added uprights to the left and right and then remove the trusses even when it is holding the floor weight. Not going to risk doing that and will get someone to take a look and advise though :)

That's pie in the sky.

A truss works as one unit and is lots of bits of wood plated together. You can't just take bits out, and try to construct another roof in between the trusses and then removing the trusses afterwards - that's a nonsense cowboy approach.
 
That's pie in the sky.

A truss works as one unit and is lots of bits of wood plated together. You can't just take bits out, and try to construct another roof in between the trusses and then removing the trusses afterwards - that's a nonsense cowboy approach.
Woody old chap have you been on the sugar again, any loft conversion with premanufactured trusses would be converted this way.
 
Woody old chap have you been on the sugar again, any loft conversion with premanufactured trusses would be converted this way.

Y e s , o f c o u r s e i t c a n , j u s t l i k e I c a n t y p e a r e p l y b y p r e s s i n g o n e k e y a t a t i m e w i t h m y n o s e .

Why would you want to mess about inside that - ducking, bending, propping, when it's all got to be changed anyway?

:rolleyes:
 
:D
I was hoping I could do something very similar to the below. New steels for the flooring so the floor weight is not taken by the trussses and then use wood to support the roof above and once the roof is suitably supported the diagonal supports can then be removed.
Not questioning anything as I have no idea other than what I have looked at online but just wanted to know if the process was acheivable before I called anybody over to take a look. If it was going to be a scaffold and roof off job I would reconsider.

One question woody - Not sure why "it's all got to be changed anyway" once it has been done?

 
thats making my eyes bleed they have cut them trusses out without even being fully supported right under the valley set

it can be done but quicker to just take of and start again proberley cheaper too
 

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