Roof on deck

[oohsam]

Hey guys
Im in the process of building a deck at the moment (see my other post for pics) and the deck will not have a roof over it.
I have been speaking to my wife and she is keen for the idea to deck 1/4 of the deck area but at a later stage.

So my question is how hard is it to add a roof to a deck

Is it jsut a matter of putting the stumps in, joists hangers on the fascia of the hosue and bolting to the bearer between the stumps?

I would assume as it does not hold many weight it would not need much support.
Cheers.

[bpj1968]

supporting posts will have to be above the stumps. Part of the design consideration is not the downward force of gravity, but actually uplift. This is caused when the wind blows over the roof. Pretty much the same thing that keeps planes from falling.

Other than that it is pretty straight forward

[Spelunx]

I put a roof over my deck (see my thread). The easiest way to do it is to extend the posts through the deck, to the roof. That way the load of the roof is taken by the ground, not the deck.

If you haven't already, purchase a copy of the decking manual by Alan Staines, it is worth it's weight in gold!

[oohsam]

Ah ok.
What if I put new posts in, on stirrups, and bolt them to the beares for support.
Would that be ok.
Just about to go read your post spelunx...

[Spelunx]

I think you would have to go to an engineer for advice if you are going to attach the posts to the bearers. There are a lot of different forces that come into play, the most under-rated of which is wind force. The up-draft created by a sqare metre of corro is pretty phenominal, and when you think of the number of square metres in your average deck, it would be pretty easy for the lot to fly away, taking half your roof with it.

The easiest way to do it would be to pretend the deck doesn't exist, and carry all the loads off the roof, through to the ground. I *THINK* you can line up the pergola posts with the deck posts, and attach them in some way, but not 100% certain. If you were to use a metal plate each side, and a couple of bolts per post, that would probably do it.

Hopefully someone will come along soon with more experience than I.

Cheers

Jayson.

[Bloss]

Better to plan for the roofed area as you build and take the outer posts through to the ground, but can be done later.

It is common to fix the roofing timbers to fascia using Pryda type brackets, but usually requires noggins to be inserted behind fascia and fascia to be fixed more securely with nails & or screws.

You can also use brackets off roof rafters or trusses to hold a beam for a deck roof depending on heights and clearances.

As Spelunx said invest in the Alan Staines book - worth every cent and has all the info you need. Bunnings sell them.