Was really just checking whether the insulation was sufficient (or excessive) and the same with the screed (i.e., is it excessive for response times). Obviously the architect has spec'd it but its always worth getting a second opinion.
Your comment
here in this
thread appears to contradict this.
Did you engage an architect on site who specified a different floor build up?
Regardless of what has occurred to cause this apparent confusion my comments are relevant.
Self builders tend to focus on the matter at hand, not the consequences of the decision for the building in later use.
This is why its important to have your architect involved on site, not just pay him for a few drawings which migh be fine and detailed enough for planning stage, but which need a shedload of work to bring them up to tender and then working drawing stage.
My comments are intended to de-focus you from the specifics and direct you towards getting a comprehensive review of your details.
You can bet that if something like this is left out, there will be other things arising, eg. Part F ventilation of the roof is a recurring query.
I have to admit I am surprised that you need to ask such questions if you retained a competent architect to prepare working drawings and advise on site - he should be able to answer all your questions.
Regarding the second question, I'm not worried about the floor being half pre-cast slab and half pour (this is standard practice where necessary), I was just enquiring about the radon barrier under the pre-cast slab.
Your knowledge of building matters may or may not be limited, but believe me all this stuff is related.
Its the way an architect looks at detailing, because the buck stops with us and we have to consider it all.
If you want the "limited answer to a specific question" approach, post your query on Boards.ie on the Planning forum.
But be wary about answers that don't review the global issues affecting a particular detail - problems arise from ignorance, not competence.
In relation to your comments above, I wasn't talking about the floor sagging, but the radon gas barrier.
Pre cast floors are required for depths of fill greater than about 1200mm.
This is because excessive fill can lead to compression and cracking in the slab I understand it.
My understanding is also that this fill, on which the radon gas barrier rests, will will compress naturally over an extended timeframe.
This will tend to lead to a gap between it and the underside of the PC Unit, with the possibility that moisture may gather there and cause problems.
Detailing and draining of this area is also important, and needs to be considered at an early stage, as is the continuity of the radon gas barrier.
This is particularly important at the point of changeover from one form of construction to another and cannot just be left to a certified installers [or worse, an uncertified builders] "lap detail".
Any membrane, unless properrly supported, will run the risk of sagging and tearing with time, especially if not properly protected from site traffic.
You also need to talk to your local
Building Control Officer.
Those who take their job seriously may have their own ideas about what membrane you should use.
I'm not talking about a preference for brand, I'm talking about durability on site and workability of the material in use.
And remember, once the floor goes on, if a problem arises at a later date, it'll cost a fortune to correct.
ONQ.
[broken link removed]
All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand.