Ceiling height in habitable room ?

joebre · 22-01-2024 09:17PM #1

I've searched but didn't find a definitive answer.

Retention Planning drawing of cross section for a first floor bedroom ceiling shows 2424mm.

I inspected the house today and found the height to be just 2333mm.

I can see no reason why 2400mm could not have been achieved.

So, is 2400mm is recommendation or a requirement ?

Mellor · 22-01-2024 10:47PM

https://www.boards.ie/discussion/2058332721/ceiling-height-in-habitable-room

It comes from TGD part F. Section 1.2.1.7

Its a “suggested dimension consistent with good room design”.

What was the purpose of the inspection?

joebre · 23-01-2024 01:38AM

Was looking at in in a pre-purchase inspection for a client.

Architect has signed off "substantial compliance with Planning and Building Regulations.

As he was seekng retention, why did he not dimension the ceiling height correctly ?

Mellor · 23-01-2024 03:31PM

https://www.boards.ie/discussion/comment/121657512#Comment_121657512

Did he qualify why it was substantially compliant and not simply compliant. Specifically in relation to ceiling heights.

If I was to give him the benefit of doubt, I'd suggest that the retention drawings were based on previous design drawings, rather than a specific detailed survey. If I was being cynical, a convenient typo obscured a element of blurry compliance.

C. Eastwood · 02-02-2024 01:06AM

The Construction Professionals and Builder are obliged to know that the minimum height from finished floor finished ceiling in 2.4 m for ventilation purposes as per TGD.

Mellor · 02-02-2024 11:07AM

https://www.boards.ie/discussion/comment/121709069#Comment_121709069

It should be. I think even aiming for 2400mm exactly isn't very good. But wording of the TGD is broad enough to allow for considerable tolerance. It's, literally a suggestion, not a requirement. And as it's under part F, you'd have to establish that a lower ceiling wasn't achieving sufficient air changes. I suspect that's why is was qualifies as substantially compliant.

Ceiling height in habitable room ?

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