Wall plate for flat roof - all 3 sides required?

[BobTheBear]

Hi,

Planning ahead for the roof of my extension and wanted some advice.

The roof joists (175mm x 63mm) will fix to the back wall of my house on joist hangers and then the other end will fit to the front wall of my extension.

On the front wall I know I need to fit a 4" x 2" wooden wall plate, but do I need to fit wooden wall plates on the side walls? No joists will be fitted to the side walls, so I cant see any reason to fit wall plates there.

 

[^woody^]

You don't need a wall plate for a flat roof

 

[BobTheBear]

OK

Do I fix the joists to the inside wall with straps then?

Would it matter if a wall plate 'was' fitted, seems easier to fit the joists to?

 

[Alastairreid]

http://www.delston.co.uk/joists.htm

 

[BobTheBear]

Thanks Alister,

Shows using wall plates, doesnt indicate whether they are needed on all walls/sides though

 

[^woody^]

No it would not matter. The joists will need to be strapped down just the same and there is no extra advantage in fixing to a plate

If you do fit a plate, then you will need to fit one all the way around else the ceiling will be higher than the wall ... and you'll need to support the noggins for the two end joists

 

[Alastairreid]

You only need wall plate where the joists bear onto the wallhead.