Skinny insulation

[Nimster]

Afternoon
We've got permission to insulate our cottage ceilings. A bit of background - they are 18th century (probably) Grade 2 listed cottages, with exposed beams to roof level. We want to keep the beams as exposed as possible, so are trying to find the thinnest (but most efficient) insultation around. We know about Kingspan but also found this stuff:

http://www.roof-solutions.co.uk/ourshop_158894_39689.html

which apparently is more efficient than Kingspan and only 10mm thick.

Does anyone know of anything better/more efficient, bearing in mind the rafters are 2x4s so we're limited in the depth of insulation we can install once the air gaps and plasterboard/skim are included.

And for those of you who are going to suggest leaving it uninsulated as it's authentic - we tried - I can't do it. I'm ok snuggled up under the duvet, but trying to put make up on when it's 7 degrees and I can see my breath is not funny :shock:

Any advice gratefully received
Thanks
Nim

ps - apologies if this doesn't make sense; I've got bird flu and can't think straight.

 

[CHRIS]

You could use that Tri-iso super 10 (ducks to avoid incoming fire) a friend has used it in his roof/loft conversion in a 30s semi and it makes the world of diffrence to his house and very easy to install, just staple up.

http://www.tri-isosuper10.co.uk/

there is a long ongoing row on another website with all sorts of people getting involved so have a look around but from my experience it looks good (have seen it in a new build thatched place in Hampshire as well and it was very warm even before the the thatch went on)

 

[Nemesis]

Cue Biff...

 

[plumbers mate]

Potted him yet?

When the man comes to look at a house when one wishes to sell and his book says a certain thickness of insulation in the roof is needed to offset the single-glazed windows, how does one convince him that one has used super efficient but thin stuff of which he's probably never heard?

Also, why can't insulation people agree to a constant way of pricing their product - some do it in sq ms, some in linear ms and some in blocks of which a certain number will cover a certain area.
It's like the old GCE arithmatic questions eg if a roll of wallpaper covers x sq ft, to the nearest roll, how many rolls are needed for a room of 8 ft 6ins high if the room is 12ft x 15 ft and there is a door of 7ft x 2ft 6ins and two windows each of 4ft 6ins wide x 6ft 6ins high ...... show all workings.
Carpet is labelled at £xx per sq m equivalent even if it is sold by the linear foot, so why can't insulation be sold the same way?

 

[NT]

The buibble wrap stuff if nowhere near as insulating as isocyanurate foam, and its easy to see why really. also you need a hard surface to skim onto, not bubblewrap.


NT

 

[Penners]

Multifoil insulations are the subject of considerable controversy at the moment. And apparently a number of local authority Building Control departments who originally approved them are now backtracking on that decision.

 

[Johneds]

How do you propose ventilating the space behind the insulation? If you cannot provide ventilation you run the risk of condensation damage to the roof timbers. Well, when I say risk, it's inevitable really - just a question of how long before the damage shows up?

 

[Lime]

Afternoon
We've got permission to insulate our cottage ceilings. A bit of background - they are 18th century (probably) Grade 2 listed cottages, with exposed beams to roof level. We want to keep the beams as exposed as possible, so are trying to find the thinnest (but most efficient) insultation around. We know about Kingspan but also found this stuff:

http://www.roof-solutions.co.uk/ourshop_158894_39689.html

which apparently is more efficient than Kingspan and only 10mm thick.

I've heard of reflective but I'm not sure what this means.

The Ultra-Thin and Ultra-Performing Refelctive Insulation

Refelctive?

However they've managed to highlight the aspect of this type of insulation that I have suspicions about.

Just how much heat in a room is transferred and lost to the ceiling by radiation?
I suspect very little.

Most of the heat is transferred by convection (hot air rises) and conduction where the warm air touches the ceiling making direct contact.

 

[BMcD]

Lime Wrote:

I've heard of reflective but I'm not sure what this means.

roof-solutions.co.uk website wrote:
The Ultra-Thin and Ultra-Performing Refelctive Insulation

Hmm... I wonder if Kingspan would have been better?