Opinions on insulating this vaulted ceiling

[Aidy Gourlay]

Hi all,

Looking for some advice on insulating this ceiling. It has old felt on it and we’ve had veluxs put in. The rafters at 100mm wide, and I’d read that you need a 50mm gap for ventilation.

What would be the best way to go about insulating this?

Thanks in advance

Aidan

 

[RandomGrinch]

Hi,

I'm only a DIY'er and may be very wrong.
...but I'm afraid that velux install donesn't look very building control compliant to me.
Were they installed by a self-certifying velux installer, or will building control be visiting later?

This doesn't look like a great detail...

 

[Aidy Gourlay]

Hi,

I'm only a DIY'er and may be very wrong.
...but I'm afraid that velux install donesn't look very building control compliant to me.
Were they installed by a self-certifying velux installer, or will building control be visiting later?

This doesn't look like a great detail...

View attachment 283454

Hi,

We had a self-certified Velux installer, how would we go about sorting that out?

Thanks

 

[RandomGrinch]

Hi,

We had a self-certified Velux installer, how would we go about sorting that out?

Thanks

I will let others more qualified than I comment; because the rafter span is short, what has been done may be adequate.
And I'm afraid I don't know how to deal with the insulation either - ideally you want a cross flow of air to allow the 50mm air gap to be kept ventilated. This looks difficult to achieve in your case.

 

[Aidy Gourlay]

I will let others more qualified than I comment; because the rafter span is short, what has been done may be adequate.
And I'm afraid I don't know how to deal with the insulation either - ideally you want a cross flow of air to allow the 50mm air gap to be kept ventilated. This looks difficult to achieve in your case.

No worries, thanks for your input though! appreciate it!

 

[datarebal]

cut 1 put 2 back. (Rafters) I would say its looking naughty.
what is the roof covering ?

 

[Aidy Gourlay]

cut 1 put 2 back. (Rafters) I would say its looking naughty.
what is the roof

Hi,

It’s an old bitumin type felt by the looks of it. So you’re suggesting I should get the sides doubled up? Thanks for your help

 

[datarebal]

I can see the felt is 1f bitumen . What roof covering is it ? Tiles or slate .?
The side rafters should have been doubled.
Even more important as rafters have been sawn through

 

[Aidy Gourlay]

I can see the felt is 1f bitumen . What roof covering is it ? Tiles or slate .?
The side rafters should have been doubled.
Even more important as rafters have been sawn through

Oh it’s tiled, is this something I can do now they’re in? If so, how best to fox them?

 

[datarebal]

I'd be inclined to send the pictures to velux tech support and let them know they were fitted by a registered installer.
You still have the luxury of access so doubling up rafters will be easy enough ..Remember tiles are heavy , snow makes them heavier etc
Insulation going to be tricky to get flow.
What room is this roof over ?

 

[Aidy Gourlay]

I'd be inclined to send the pictures to velux tech support and let them know they were fitted by a registered installer.
You still have the luxury of access so doubling up rafters will be easy enough ..Remember tiles are heavy , snow makes them heavier etc
Insulation going to be tricky to get flow.
What room is this roof over ?

Will do thanks. This ceiling is within the kitchen diner and extends from the house about 1-1.5m

 

[catlad]

As above really I can only see about 3 complete rafters! don't procced forward until you have rectified this is my advice.

 

[datarebal]

As above really I can only see about 3 complete rafters!

Me too , I was going to move on to that..

 

[Aidy Gourlay]

As above really I can only see about 3 complete rafters! don't procced forward until you have rectified this is my advice.

How would i go about 'completing' the rafters? What would i need to change about the current setup to get it to an acceptable level?

Cheers,

 

[RandomGrinch]

As above really I can only see about 3 complete rafters!

I make it 7 complete, out of the 12 original, over the whole length.