Re: Re: Zoned Heating Control

[Chris Hunter <cjhunter@xxxxxxxxxxxx>]

 >wearing surface ...

aha ... so be it ...

>bonded to the screed ...

thank goodness !

>each room a wet-room ...

'quite like welded lino', and that was one of its advantages - each
room could be water-proofed to a reasonable degree with a low
peripheral upstand easily included !

Chris


On 30 Apr 2007, at 09:52, Neil Ball wrote:

> Anhydrous screeds such as Gylon & Superflo are not suitable for
use
> as the
> wearing surface according to their respective datasheets so some
> kind of
> floor covering will be required. In the 7 months since my screed
> went down
> it has worn quite a bit where it was unprotected. I'd suggest
> speaking to
> your Gylon/Superflo rep to see if there is any way of finishing the
> screed
> as a finished floor surface in a domestic situation.
>
> You can glue the flooring to the screed as long as you leave the
> expansion
> gap which can be filled with cork strips or sealant. I've supplied
> controls
> in many homes where wooden flooring is installed over underfloor
> heating,
> both fully floating and bonded to the screed. In either case the
> system
> works very well. I'm putting some laminate & engineered wood fully
> floating
> in a number of rooms and have no worries about this at all.
>
> If you fit tiles you should also leave a 5mm expansion gap at room
> edges and
> within doorways according to the BAL adhesives guidelines - I've just
> completed 120 m2 at the new house and followed the guidelines to
> the letter
> as I've been paranoid about the tiles staying stuck!
>
> I would not be worrying about the flood, if the worst happens it is
> likely
> to cause damage regardless unless you tank the floor/walls and install
> drains, in essence making each room a wet room.
>
> Neil B.

> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On
> Behalf Of
> Chris Hunter
> Sent: 29 April 2007 09:49
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] Re: Zoned Heating Control
>
> Richard -
>
> thanks ... interesting ...
>
> rather than temperature gradient, I guess it'll be rate of heat
> supply, that would be the constant, for a given room, with a higher
> temperature gradient between UFH pipe & air in the room being
needed
> to drive the heat through if there's more resistance, because of
> carpet or underlay, say ... and the higher temperature in the pipes
> that that would need would lead to some loss of efficiency, thanks to
> greater heat losses upstream from the UFH and basic thermodynamics
> (small temperature differences being more efficient in any
> thermodynamic / heat-cycle, IIRC) ...
>
> 'must say, I'm edgy about loose-floating the wooden covering &
> leaving a gap at the edge .... noise issues & what happens if
there's
> a flood ! Plus, we intend not having skirting boards !
>
> when we started our build, we had floor-grade hardboard on our list
> of options ... didn't sound a good idea, until I got a sample of the
> material ... it's still an option (suitably sealed) !
>
> 'wonder if it would be possible to leave the screed (anhydrous)
> uncovered ('might have to be sealed, I guess) ... or if an epoxy
> paint could be good ??
>
> if it was up to me, I think I'd go for welded linoleum, but 'wife
> wants wood !
>
> Chris
>
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