Are decking "kits" any good?

[elsmandino]

Afternoon all.

I had a garage demolished, last year, and now have a concrete base that is 12 feet x 22 feet.

I like the idea of putting down some decking on top and, from having done a bit of research, realise that the decking frame needs to be constructed using "class 4" timber - i.e. any timber that is going to be in constant contact with water.

I have noticed that there are lots of decking kits out there:

1. Is there any way to tell whether these kits use class 4 for the subframe or will they simply rot away over the next few years?
2. Is it economical to use a kit or could be it be cheaper to do everything from scratch?

 

[foxhole]

Too little info for informed reply.

 

[elsmandino]

Apologies - just as an example, if I were to buy this kit:

Forest Ultima Decking Kit 2.4m x 2.4m - Screwfix

Order online at Screwfix.com. Patio deck kit transforms a garden area into the perfect space for al fresco dining and entertaining. Can be laid directly onto an existing patio. Delivered flat-packed for easy self-assembly. FREE next day delivery available, free collection in 1 minute.

www.screwfix.com

Could I place it directly on a concrete slab or will it rot away?

I understand that it is pressure treated timber but it does not say whether it is class 2, 3 or 4.

 

[scbk]

Unless specified otherwise, "treated" timber will be the cheapest treatment.


If it's a decent concrete foundation look putting down paving on it. It will be less of a step up on to it, less slippery, and will outlast any timber by decades.