We weren’t sure how much we would use a topper for our California or if we even needed one so I decided to have a go at making one, below is a guide to what I have done and a template if you want to have a go at making one for yourself.
We ordered 20 Meters of black waterproof nylon fabric from eBay, you could get away with 10-12 Meters but I wanted some extra for mistakes and also to make some bags.
I took some measurements and came up with the template below, this is the final size you need. You need to add about 15mm all round for the stitching joints and the hems.
Below is a photo of it all stitched together and just placed on the roof without tie downs
The tie downs are created with a loop of webbing sewn to each corner, 2 evenly spaced webs at the sides, I also put tabs in the centre at the front and back that have never been used.
Onto these tabs I tied into a small loop of 3mm elasticated bungee material .
You’ll also need some nylon washers and a threadded knob, I got mine from RS components, part number 178-792, five 5mm knobs part number 448-8549.
I Just slide the fixings along the rail and lightly tighten them.
To secure the topper on the awning side I have used a log piece of elastic threaded through both loops of webbing on the awning side thats just stretched over.
We only use the topper if its forecast to be heavy rain or rain with a strong wind and have not missed being able to see out of the windows, in the 4 years of owning a California we have only used it a hand full of times and it spends most of its life rolled up stowed away under the drivers seat.
Total cost about £35, If you need and more information please ask.