Insulation and Vent in loft conversion dormer

[izrr]

Hello

I have recently had a loft conversion. As far the dormer is concerned, the ceiling goes like this:

Starting from below:

Skim, plasterboard, spotlights, double c16 joist, xtratherm (foil) insulation on top of the joist, 3 layers of hot bitumen felt, vent all along the dormer beneath the fascia board. There is no bathroom extractor fan flap. I can see the foil insulation well above the vent when I look through my bedroom window.

Is this correct?

My concern is that as the vent is continuous (from left to right of dormer) and there is no insulation touching the plasterboard, when the wind is blowing the air gets through the vent and between the insulation and the ceiling which could cause the ceiling to get very cold hence loosing heat and making the rooms cold. Am I right or am I being paranoid?

I see other dormers where there is no open vent, just closed fascia boards top and beneath with an extractor fan flap, why are these different?

Sorry, dont know much about construction....

I am thinking of getting the vent closed, is this wise to do? I read somewhere that air is needed so as no condensation is caused.

Is there anything that can be done so that the rooms dont get cold, that is if the air is causing it... and also stay within the building regulations.

Would appreciate any help.

Thanks

 

[chappers]

Are you saying there is a continuous ventilation strip all along thelength of the soffit, if so this is probably correct depending on the design of the roof.

 

[izrr]

Are you saying there is a continuous ventilation strip all along thelength of the soffit, if so this is probably correct depending on the design of the roof.

Thanks for your reply. My concern is that as the ventilation is continuous and there is no insulation between the ceiling joists and the xtratherm insulation is above the joists, would the air vent cause the room ceiling to become cold hence making the rooms cold.

Thanks