Decking Joists - Will these be ok?

These seem much small in width then normal joists, the decking will be at ground level all though elevated slightly on concrete padstones as the ground is very wet most of the year.

The decking will be about 9sq metres (3.5m by 2.5m) do you think these wil be ok for the job?

http://www.diy.com/diy/jsp/bq/nav.j...efview=lister&ts=1237492791660&isSearch=false

 

Muddy,

these will be ok but i would suggest that you dont push them out any more than 500mm between joists and use a good quality decking on top. The spec from B&Q might tell you different but ii have had loads of customers sending taking stuff back to those guys.

Baz

Baz

 

Is there anything similar priced that you would recommend? I was going to space them 400mm per joist

 

Lol, that's not a joist.:lollol:
I very much doubt that with cope with any form of elevation. Recommend this be laid on a flat dry surface if you expect it to last more than 5 minutes.

Ideally decking joists that are raised should be 4"x2" or very minimum 3"x2". You also need 1" deck thickness to avoid curling.

You can do decking cheap but it will look cheap and it won't last long

This is over kill but my joists are over wet ground 6"x2" but on pad stones. The B&Q thickness on that link I wouldn't even use as nogs.

 

Try your local timber merchants/mill.
I needed some 3.6m long pressure treated 8x2`s.. £10 each with free local delivery.
I couldnt get a standard 8ft 3x3 fence post for that money at b&q or wickes and i`d have to go fetch it :wink:

 

They look like little sticks to me I'm all for overkill cause at least u know it'll last and be safe

 

Thanks for the comments people!

Banana Man, thanks for that, like th elook of your project. Didnt think of using breeze blocks to sit them on

 

Level them off on a nice footing and they provide a good flat base for laying joists.

Give the deck a slight run so that water doesn't sit.

 

Breze blocks work very well and ultimately will last longer than concreted in posts, this is also the method I use. Use a length of plastic DPM between the joist and the block to stop the damp rising up through the block.

The heavyer the joist the better, I have also often used tanalised 2"x6" before. a large timber or builders merchant will be the best place to go and youll have a choice of lengths so potentially less wastadge.

 

Also leave at least 7mm gap between the planks in a wet area as they swell a lot when damp. My decking never get direct sunlight' last year I coated it with clear decking protector (i like the natural colour of the wood) and so far this winter it hasn't gone green.