Quick question about Over Fascia Vents

[VerticalTobe]

This is going to be a really easy question for those in the know, but I couldn't find the answer anywhere so here goes...

Short version; is it possible to fit over fascia vents if you're overboarding existing wooden fascia's?

Longer version; I'm looking at having my wooden fascias and soffits over-boarded (I know, I know, but they're in good nick other than the flaking paint and some general maintenance needed).

There's an issue with condensation in the attic at the moment and the four tile vents that were installed last year haven't really helped much. Over fascia vents sound ideal from a low maintenance point of view, but am I right in thinking they won't work with overboarding because there's no gap?

 

[Mw Roofline]

Yes you can. The ofv's simply sit on top of the existing timber so you clad the wood as normal but bear in mind your tiles will sit up to half an inch higher. Doable if a detached with a bit of playing around but no good if you are a semi.

 

[VerticalTobe]

Thanks - it is a detached so should be doable.

 

[noseall]

Make sure they are used in conjunction with eaves vents so you don't stifle the air flow when fitting the loft insulation.

 

[^woody^]

Make sure they are used in conjunction with eaves vents so you don't stifle the air flow when fitting the loft insulation.

Eaves tray?

 

[noseall]

Make sure they are used in conjunction with eaves vents so you don't stifle the air flow when fitting the loft insulation.

Eaves tray?

The black crinkly stuff just up from the trays.

 

[^woody^]

There's an issue with condensation in the attic at the moment

Cut some little wooden wedges and put them into the laps in the felt to create a gap. The layers of felt near the eaves and ridge on both front and back of the roof

 

[VerticalTobe]

I did look at those Easyvent fittings for that - they seemed very expensive for what they are, so will certainly the wood wedges a try.

I wasn't really sure if I needed to fit better ventilation overall though, as well as opening up the felt overlaps (there's no soffit venting at all at the moment).

Make sure they are used in conjunction with eaves vents so you don't stifle the air flow when fitting the loft insulation.

Currently the insulation in there is pretty woeful, so I can only imagine it getting worse when I top it up. The rafter vents in that picture, are they essentially the same as the ones you can get to fit inside?

 

[^woody^]

I did not know that someone had commercialised my idea

Just make something similar out of timber (tile laths normally) and design them so that they don't slip down the felt. A sort of hook of some description.

This tends to not only provide enough ventilation, but also allow any condensation to run onto the outer surface of the felt not down the inside

 

[VerticalTobe]

Turns out my earlier comment of the fasica's being in good nick was premature - there was a lot of rotten wood in parts which had been hidden by the gutter line / the previous occupants layers of paint. Felt support trays were needed as the end of the felt was in a right old state too.

Oh well, all replaced now and seeing as I was doing it I put the over fascia vents in - one (probably silly) observation though, they don't `seem` to have upped the ventilation in the attic by much. I know it's subjective and I wasn't expecting a howling gale blowing through but there still feels like little to no air movement up there, even when the wind is blowing outside (the eaves aren't blocked with insulation as that hasn't gone down yet)

Was I expecting too much as this is more `passive` ventilation?

 

[catlad]

dolly pegs would be a cheap option for what you were talking about making Woody.

 

[^woody^]

Yes probably

dolly pegs