Enclosed Porch Ceiling...

[Spuggy]

I have just built a small enclosed porch approximately 1.5 x 2.5m with cavity walls and a pitched roof. The roof is felt/batten/tiles, and the ceiling inside is not yet boarded so I still have complete access to the underside for any extra work. However, once it’s covered that’ll be it!

Does anyone have any advice on what I’ll need to do regarding the ceiling inside; ie insulation, ventilation, materials, etc.?

Cheers.

 

[Leofric]

Foil backed plasterboard and skim ceiling but you should have thought about insulation and ventilation in the roof design before you got to this stage .

 

[^woody^]

I don't know why you would want to insulate a porch ceiling, especially if its unheated, and has no floor or wall insulation either.

Just board and skim it. Don't worry about ventilation of the roof void, as its a non issue.

Ensure you have ventilation in the actual porch

 

[Spuggy]

That is the reason I asked - the porch walls and floors are insulated (I should have put that in the first post really). The porch is an extension/projection outside of the original hallway, so does have heating in it too. The house is south facing and gets very hot some days, freezing on others.

 

[^woody^]

Then throw 300mm of quilt up there first.

 

[Leofric]

Eaves ventilation required to cold roof insulated at ceiling level.

 

[23vc]

Thread hijack alert, but does that mean that for my (attached, unheated) garage, I can also just board the ceiling with normal plasterboard, include eaves vents and not need to worry about insulating anything?

 

[^woody^]

Yes. Insulation won't magically make a cold unheated space warm.

 

[23vc]

Ta. Not worried about heating anything, want to avoid mouldy dampy issues

 

[Spuggy]

Eaves ventilation required to cold roof insulated at ceiling level.

Would lap vents be a reasonable remedial alternative?

 

[^woody^]

Would lap vents be a reasonable remedial alternative?

Not needed for a small porch roof. There will be enough adventicious venting through gaps and felt laps.

 

[Spuggy]

Cheers Woody.

 

[Leofric]

Thread hijack alert, but does that mean that for my (attached, unheated) garage, I can also just board the ceiling with normal plasterboard, include eaves vents and not need to worry about insulating anything?

Why do you want to board the ceiling if it is not heated or insulated

 

[^woody^]

Why do you want to board the ceiling if it is not heated or insulated

To keep up with other trends from the 19th century onwards.

 

[Leofric]

To keep up with other trends from the 19th century onwards.