ᐅ Ventilation in Insulated Attics

Created on: 28 Oct 2014 11:14
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Illo77
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Illo77
28 Oct 2014 11:14
Hello,

I have a question regarding the attic... In our house, both the ceiling between the upper floor and the attic and the sloped roof are fully insulated up to the ridge.

The controlled ventilation system for the living space is installed in the attic, and otherwise, the area is used for storage.

What I’m wondering currently is, since there are no windows there, whether the attic space should also be ventilated.

There are no particular problems or defects that bother me; the main issue is the dusty, stale air when spending time there (which makes sense, since where else would fresh air come from).

Does it make sense to include the attic in the controlled ventilation system, or is it better to leave it as it is?
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Saruss
28 Oct 2014 11:19
A professional also told us that the attic needs to be ventilated, even if only with a very low air exchange rate, to prevent mold growth.
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Doc.Schnaggls
28 Oct 2014 14:51
Hello,

if your roof is actually insulated all the way up to the ridge, you should regularly ventilate the space to prevent potential mold growth.

We also wanted to insulate our attic (in addition to the ceiling insulation), but our home builder strongly advised us that without daily ventilation or integration into a controlled mechanical ventilation system, mold cannot be ruled out.

Our attic is currently not insulated, except for the wood fiber insulation – ventilation is provided through ventilated roof tiles.

Regards,

Dirk
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Bieber0815
6 Nov 2014 21:46
Illo77 schrieb:
In our case, both the ceiling between the upper floor and the attic is insulated, as well as the roof slope completely up to the ridge.

May I ask why someone would do this?
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Saruss
6 Nov 2014 22:26
He already wrote that... Controlled residential ventilation in the attic.
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Bieber0815
7 Nov 2014 00:42
Saruss schrieb:
He already wrote that... mechanical ventilation with heat recovery in the attic.

I have read that, but I still don’t understand why the attic is insulated on all sides because of it. Does mechanical ventilation with heat recovery here mean that devices and equipment for this ventilation system are installed in the attic? Does this require comprehensive insulation? What kind of equipment are we talking about? Where can I find more information about this?