Last week during a great break, I experienced a couple of periods of overnight torrential rain whilst in Norfolk for the first time with an Isabella North awning erected on my 2021GT550, needless to say, we had water coming down the caravan side onto the table that we had moved into the awning from inside & mounted on the outside bracket. I did not have a Kampa awning rail kerb fitted & will fit one in future as I feel it would help stop most of the leak from the Eriba roof discharge, however, the water was actually entering via the awning rail bead groove as this is only a sliding fit with the bead & no type of kerb would stop the water entering from the short awning drop section that puddled on the awning roof adjacent to the rail. As I said, the rain was torrential, but I think that full waterproofing in this circumstance at the awning/Eriba connection can only be achieved if the awning roof design falls downwards from the rail connection in the form of a short valley gutter that discharges at each end. Of course, the other choice is to duct tape the join from inside, this worked for me as a temporary fix, but today I'm still cleaning the residual adhesive from my Eriba.
Please take note awning manufacturers.

Thanks for the 'heads up' Motters, that saved more unnecessary expense, do you have a Hymer part no. for the pukka Eriba seal, I've never seen it & have searched for this seal but can find no reference of it.
I was just wondering about fitting a second rail just below the existing rail & find/form some kind of independant slide on gutter that catches the water that's by-passing the bead, that then discharges at each end of the awning, although I would possibly invalidate my Eriba warranty using fixings so maybe this would have to be glued-on.

Yes, I've just viewed the Walker awning site, that's a much better design, why on earth didn't Isabella do that? I understand that the extra 'clip-on' rail trim even comes as part of the kit when you purchase the awning.
I'll be winterising the Eriba soon so will will deal with the rain issue next year.

When we brought our Isabella north new it came with rain gutter trim ,fixed on small bead of Stixall never had a problem

we are using the ets1395 seal and instead of Blu Tack we are using foam ear plugs. If you roll them up slot them into the rail at each end of the awning connection. they expand and block any water traveling down the connection rail. They slip out easily, better than trying to pick out Blu Tack.

Cheers Steve

Excellent tip. Thanks. I will try that, because it is, indeed, tricky to get the blu tack out!

On our first trip out this year it rained fairly hard and we had no water leak in through the join between awning and caravan, so sealing the ends of the strip really does work.