I inted to lay decking over a tatty concrete area at side of house. What is
the minimum depth of joist to use? I want to keep the increase in floor
height to a minimum. Would I get away with something like 2 x 2 inch joists
laid on thin roof slates to raise and level them over the concrete like
this....

====================== deck board
[ ] 16in [ ] 16in [ ] 2 inch joists
== == == slate / tile leveller
/////////////////////////////////////////////////// concrete base

or is this a recipe for a quick (though short) descent?

TIA
ZD

"Zipadee Doodar" wrote in message
...
I inted to lay decking over a tatty concrete area at side of house.
What is
the minimum depth of joist to use? I want to keep the increase in
floor
height to a minimum. Would I get away with something like 2 x 2 inch
joists
laid on thin roof slates to raise and level them over the concrete
like
this....

====================== deck board
[ ] 16in [ ] 16in [ ] 2 inch joists
== == == slate / tile
leveller
/////////////////////////////////////////////////// concrete
base

or is this a recipe for a quick (though short) descent?

TIA
ZD

Info & diagrams etc at ;
http://www.deckingweb.co.uk/deckingw.htm
http://www.pavingexpert.com/featur05.htm

Jenny

"Zipadee Doodar" wrote in message
...
I inted to lay decking over a tatty concrete area at side of house. What
is
the minimum depth of joist to use?

If you are laying on concrete all you need is sufficient depth to allow air
circulation and water drainage.

Would I get away with something like 2 x 2 inch joists
laid on thin roof slates to raise and level them over the concrete

The slates will almost certainly fail. Use pads of mortar - it's very easy
to mix in a wheelbarrow.

The message
from "Zipadee Doodar" contains these words:

I inted to lay decking over a tatty concrete area at side of house.

Go to the weekly abc for newcomers post, follow the links to the FAQs,
and thence to cormaic's landscaping website.

Janet.

The message
from "Zipadee Doodar" contains these words:

I inted to lay decking over a tatty concrete area at side of house.

Go to the weekly abc for newcomers post, follow the links to the FAQs,
and thence to cormaic's landscaping website.

Janet.