How to fill gaps in garden shed?

michaelsync

I have a few questions regarding my garden. 

1. There are some gap between the roof (polycarbonate sheet) and wall (metal sheet). please see the picture. 

Can I put polycarbonate sheet between to prevent rain/water to go in? Do I need to install some flushing or something? If I need, please advise me what I should install. 

2. My shed is mostly in the concrete stab but there are parts that are on rubber that on the soil. Do you see any potential issue in next 4-5 years? I am in Melbourne so the weather is a bit unpredictable. 

3. There are some gap between the floor and frame. Do I need to worry about it? Should I put some timber or rubber mat? 

The whole shed is built by our local tradie within tight budget. 

If you see something that I can improve, let me know.  

Thanks guys.

AlanM52

Good evening @michaelsync,

For this.

I suggest this and it's well priced.

Building Moulding Flashing.

https://www.bunnings.com.au/brutus-50-x-75mm-x-3-0m-jazz-building-moulding-flashing_p1100634

Remove roofing screws and slide the short side under the roofing.

Because they are timber roofing screws you will likely need to drill pilot holes in the flashing.

For this.

I suggest this.

Colorbond Corner Flashing

https://www.bunnings.com.au/james-hardie-75-x-75mm-colorbond-corner-flashing_p0710348

and this.

Black Rubber Rectangle EPDM Sponge

https://www.bunnings.com.au/moroday-12-x-38mm-x-3m-black-rubber-rectangle-epdm-sponge_p4000067

Cheers