Part sloping tiled roof

[john306]

We have a part sloping tiled roof at the front of the house covering about a quarter of the downstairs dining room, hallway and garage.
Its always been much cooler in the dining room than anywhere else in the house.
I've just got one of those lazer temperature gauges and from inside the dining room ceiling below the sloping roof part its 4 deg colder than the other parts of the dining room ceiling.
I'm guessing theres no/little insulation in there.
Before I think of getting anyone out to look at it, can I get any information as to how this problem might be solved, or is it just a case of pulling all the tiles off or removing the ceiling to check?
Thanks for any help

 

[Notch7]

Is it a sloping ceiling or a flat ceiling?

Do you mean a tiled skirt and the rest is flat roof?

There maybe a complication with the tiled section being a cold roof and the rest not, hard to say really.

My guess is you are best to cut a bit of the plasterboard out to have a look - If somebody drills some small holes to find the rafters / joists , they could cut the plasterboard at the mid point of the joists so a new bit could go back in - or if done carefully the existing bit could be replaced (so you have a temporary repair whilst waiting for further work to be done)

You are better doing it from the inside, I would’ve thought cheaper, and you aren’t disturbing any weathering details

 

[john306]

Thanks, it's flat inside dining room.

 

[noseall]

View attachment 366678Thanks, it's flat inside dining room.

If they are Marley 'Bold Roll' tiles, then tread carefully as they haven't been manufactured for years. Your other headache will be adding roof vents to the roof, should you deal with it from the inside. If you decide to strip the outside, you can use breathable membrane, along with some OFV's etc.

 

[john306]

I have just been out and have got one of these vents either side of the roof.

 

[john306]

If I did try to put insulation in ceiling from inside the dining room, what type insulation is recommended and is it just a case of laying on top of the plasterboard ceiling?
Thanks

 

[noseall]

If I did try to put insulation in ceiling from inside the dining room, what type insulation is recommended and is it just a case of laying on top of the plasterboard ceiling?
Thanks

Minimum 300mm, e.g. 100mm between with 200mm laid across and perpendicular to the first layer.

 

[john306]

Minimum 300mm, e.g. 100mm between with 200mm laid across and perpendicular to the first layer.

Thank you.
Is that just loft type insulation I need, and will those side vents in the photo be sufficient?

 

[Notch7]

Thank you.
Is that just loft type insulation I need, and will those side vents in the photo be sufficient?

You’ve effectively got a vented loft space there, so you need to insulate at ceiling level and leave the bit above to the rafters unrestricted for ventilation.

I think you might struggle to get 200mm over the ceiling joists and stay below the vent though.

I’m guessing the space might be too small to crawl in so you might need to cut more than one access hole to do the insulating…in an idea world it would be great to cut a “loft hatch” then do your insulation.