I want to lower my first floor ceiling to get extra height in the loft but how would I suitably tie the new floor to the roof structure to prevent the roof spreading.
Lower ceiling 1 (duplicates merged)
- Thread starter sully872000
- Start date
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Why do you need extra height? what is the current height in both areas?
I want to convert my loft into an office/bedroom. At the moment height is about 1.8m.
It’s not just a matter of lowering a ceiling though I doubt you have enough ceiling height to lower unless your in a house with 10ft + ceilings.
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Get a structural engineer to design you a solution.
It is feasible, but messy.
In principle, you tie the existing rafters back to the new (lowered) floor joists with suitably-angled pieces of timber, such as 200mm wide strips of 18mm ply.
You may also need to form bulkheads around the tops of the first floor windows if your new floor is to be below the tops.
In principle, you tie the existing rafters back to the new (lowered) floor joists with suitably-angled pieces of timber, such as 200mm wide strips of 18mm ply.
You may also need to form bulkheads around the tops of the first floor windows if your new floor is to be below the tops.
D
Deleted member 174758
It depends on the type of roof structure. You have given far too little information for anyone to even make a guess. A few photos from inside the loft space might help here
Do you have any example pictures of this done. Just wanted to see what it would look like.
Is that height from the top of the existing ceiling joists to the underside of the existing ridge? What height is your first floor floor - ceiling?
The joists prevent the rafters collapsing like a house of cards (rafters moving outwards)
This needs structural calculation and a lot of detail of construction of your roof as is.
Yes it can be done - but likely to be a lot of work .... consider other options ..... office as an outbuilding in the garden ?
This needs structural calculation and a lot of detail of construction of your roof as is.
Yes it can be done - but likely to be a lot of work .... consider other options ..... office as an outbuilding in the garden ?
D
Deleted member 174758
I have done this job once on a terraced house with a purlin roof. Because the roof purlins already carry much of the weight of the roof spreading isn't an issue, but getting structural steels in to carry the joists was heavy work and cutting down walls, etc was a very, very messy job. Never again!
I've got a few pics of houses that fell down after it was done
Will see if I can find them.
I don't think sully has a good track record of responding ....
It's all hearsay anyway unless they have the ceiling room to lose beneath the loft.
It's all hearsay anyway unless they have the ceiling room to lose beneath the loft.
Here we are
If you cut out those joists, your house will fall down. The roof will push the walls apart.
like this
https://metro.co.uk/2016/06/08/dram...se-660000-collapse-during-renovation-5932499/
Observe the work done by the "builders" prior to the collapse:
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