most roll out awnings become pole and strut to some extent when you detach the bottom of the legs from the van and stake them to the ground
you then only have to worry about the roof and whether it flaps too much which is controlled by the awning bars
I think most caravan parks would object to dyna bolts in their pads and most of the areas around the pads are normally soft so grip is difficult for stakes
what you want to do can be done but it can be a big chore at times and may not be possible some times
brian

One of the problems that I see may occur is water pooling on the roof. The awning-annex I had, had a central roof pole which would help, but water would still pool. This leads to a huge increase of weight and then collapse. A 14 ft awning with out one or two extra roof supports is a fair span.

Ian, if you go to the bottom of this page you will see the Aussie Traveller Coolibah awning with walls. I have just the awning and a couple of walls. It has stood several big blows where others with roll out awnings had wound theirs in. A mate had one with full annex walls that lasted a good blow at Ballina where all around him was in tatters.

If you go to the bottom of this page you will see a video of the Coolibah on one of your type camper trailers.

I must have a different screen, however I checked out the "Aussie Traveller Coolibah" web site. That camper trailer would have been very similar, and I rechon he took longer to put it up than the time I took to put up mine.
However it has occurred to me that I have asked an unfair question. In as much that 90% or more of you would have purchased the van and guess what the awning comes as standard inclusion.
This means that what ever you do, adding an annex is a modification of the existing awing. Where as, I am talking about a full purpose built annex as opposed to an awning modified to except walls. Therefore the majority of you will have no experience in comparing the two.
I have to apologize, I am sorry that I dare to question everything the salesman throws at me, I've done it on solar panels, Digital TV, and will continue to question until I am satisfied. So I'm sorry that I am being different.
PS I used to work out the back of a shop, and used to get a kick out of asking the sales guys "How do you tell if a salesman is lying -- answer his lips are moving"

deverall11 I agree with what you saying. An awning is no different to a sail.

As you can see, my extra room was very similar to the video clip. But it was purpose built.KFT you are telling me "pooling" can occur, and what steps you have taken to reduce the risk.

-- Edited by iana on Saturday 24th of January 2015 04:09:32 PM

Iana,

pooling can happen with any of them if not set up to allow water to run straight off. Either by additional support as in the curved rafters or setting it up with a slope to one end (in the case of an awning)

If your setup will be like the picture you posted I don't think you will have an issue looking at the fall on the roof of that annexe.

frank

For the benefit of those who didn't read my original question here it is again:-

So if I was to go for an 18ft van, for example, and get an annex made to increase living space, now bear in mind that once erected it would stay up regardless of forecast winds (not cyclones of course), can the roll out awning with attached walls cope, or is the purpose built annex with poles and guy ropes a stronger option.

The question is whether the roll out awning is suitable to use as an annex set up, or is pole and strut set up a stronger and better option, even though it may take longer to put up.

---

 I don't recall saying I had an issue with the awning, my question was about the annex.

-- Edited by iana on Sunday 25th of January 2015 12:36:35 PM

Hi.Iana.We have a 26ft(CABIN SIZE) 30ft overall Spaceland caravan.It has a roll out awning.On passing through Ballina we had Undercover Canvass make a full annex.Staying in Bungendore N.S.W. for 3 months of wet and very windy weather we hand little trouble.Firstly we fitted 4 curved rafters PLUS 4 roll bar foam tubes (from masters hardware)to fit onto the rafter at the awning roll end.WWe then threw a rope over the awning end to end.With the awning legs out vertical and pinned,plus guy ropes,no worries.It may sound like a lot of effort,but once you have done it once it becomes a doddle.No pooling.However, we did use waterproof cloth tape at the top corners where annex wall met van side.Hope this answers your question.

We had wind at Corrimal last week. I thought I was going to lose my awning but managed to get it in without damage. I have guy ropes on the ends but the movement was scary. The bloke two sites down had a similar awning with an annexe and while the walls billowed in and out as the wind swirled, there was no problem. The wind couldn't get under the roof.
The roll out awning is good to build an annexe under, but make sure it's sealed and you use guy ropes and long pegs.

PS  We used to carry an annexe for use on long stays, then we got a bigger van and don't need one.

-- Edited by KevinC on Monday 26th of January 2015 11:02:33 AM

From my experience, and we lived in that camper-trailer for 18 months, around Perth and up the coast, you need a variety of pegs and fastenings as the ground can change so much between camp sites, and you are really up sh---t creek if you happen to have a concrete plinth where your pins should go.
I carried the normal pins which I used two per guy rope and they were crossed over each other. I had much longer and heavier pins as well. Plastic triangular pins and also the screw in types that one would use for tethering a horse or dog, or tying up a boat to the beach. If you are in pure sand they are the way to go.
I carried a drill and masonry bits to get through the hard surfaces.
I also had a system where if the annex was to be erected over a concrete plinth, I would stretch steel cable (very light) across, and passed through the rings on the bottom of the annex, pegged under the sides of the concrete, then tensioned by turn barrels, this worked quite well in those circumstances and in high winds.
The worst time I experienced with the weather, with permission from the park manager, I dyna-bolted angle brackets to the plinth, and then used two hose clamps per post to secure it down. While three houses lost their roofs, we survived.
Camper trailers like the Jayco Swan do not like the wind, and the annex actually strengthened and made the roof of the trailer more secure.
Twice I had the annex smashed in, probably because of water pooling and the wind. Once a post etc. goes the integral strength of the unit is lost.

jules47 those screws would also be the bees knees for holding down the foot plates on the "Roll out" awning posts.

I have not been able to find these length screws Jules47!! 

Aussie Paul. 

Coventry fasteners is now called Konnect Fasteners.
In sandy or loose soil I used these.

@Paul

Hi mate Bunnings sells them in a packet of twinty