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roof vents

Eve1 · 2005-12-13 19:41:13

Just wondering if anyone knows how many vents you have to put in a roof? We are about to commence our roofing and I am doing a little bit of research but I'm not sure I understand it correctly. We are building a dormer so it is my understanding we have to put venting in the ridge, and in the eaves (do we also need vent…

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13-12-2005 8:41pm

#1

Eve1

Registered Users Posts: 97 ✭✭

Join Date: April 2005

Posts: 78

Just wondering if anyone knows how many vents you have to put in a roof? We are about to commence our roofing and I am doing a little bit of research but I'm not sure I understand it correctly. We are building a dormer so it is my understanding we have to put venting in the ridge, and in the eaves (do we also need vent slates)?

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#2 13-12-2005 10:35pm
rooferPete

Registered Users Posts: 1,497 ✭✭✭

Join Date: January 2005

Posts: 1482

Hi Eve1,

If you are using a vapour permeable underlay like Tyvek or Starex protec etc the general guide is a 25 mm continous vent at the eaves and 5 mm at the ridge.

What might be easier is if you email roofconsult@eircom.net I will send you the full brochure on roof vents.

.

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#3 14-12-2005 10:18am
Eve1

Registered Users Posts: 97 ✭✭

Join Date: April 2005

Posts: 78

Thanks RooferPete,
I have emailed you

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