Low level decking Help

[Sam_Newbie]

Hi guys,

New to  DIY and this amazing website. I wish I found this earlier!

I just finished frames (all H3 treated pine) for my deck today (5.2m x 2.7m).

After reading a few posts on low level decks in this group, I am really worried for 2 reasons:

1. I have only 1 off 140x45 bearers, and not 2 off them screwed together as advised in some other posts here. My posts are placed 1300 apart. Posts are 100x100s 350 to 400 deep. Joist are all 90x45s.

2. What worries me more is that my bearer are sitting very close to the ground, it is touching the ground in some location. How can I waterproof it? 

 I have attached some pictures if that helps.

The height of the decking currently was druven by the nayural ground and level of the house. Now I understand i should have dug and removed some dirt. Too late for that now, I guess

Any suggestions will be really helpful.

P.S: do I need to put timber between joists and connect them to prevent warping?

[Sam_Newbie]

Thanks Pete. 

I will get some dirt off to get some more clearance. If i get 150mm dirt off then my post will only be 200 deep, would that create more problems?

[Sam_Newbie]

there are 5 posts in the middle spaced 1.3m apart. the rest of them are 100x100 noggins (off cuts) screwed to the beams, J

[ProjectPete]

You concreted your posts in the ground, right?

Leave enough sand/earth around the posts to support their position.

Thanks for confirming the posts int he middle - glad to hear it.

[Sam_Newbie]

Thanks Pete, posts are all concreted. 

[ProjectPete]

I don't mean to sound like I think you don't know what you're doing, but can you please confirm you concreted your posts into the ground?

[Sam_Newbie]

Hi Pete,  all posts are 300-350 deep and have a 20kg concrete bag each.