Mixing insulations

[Gabry 10]

Hi there, who can advice me on insulation. I was thinking of putting thermal foil underneath eco-wool for my loft insulation. Its bloody freezing here.

Is it smart to combine two different insulation materials? If yes which ones and in which order?

 

Thanks G

[BuildingCare 10]

Hi put the foil one down first then your over insulation of choice must be realy cold for you to use two types

[numero uno 10]

You should have 100mm of rockwool between your ceiling joists then 170mm layered the opposite way on top of that. You can sometimes get a grant for the insulation. The foil that is any good is usually expensive so I would recommend using the rockwool much cheaper hope this helps

[katkin 10]

What is safe to lag cellar ceilings with please? Want to stop some of the cold air coming through into our living room, last winter was p-p-p-p-perishing!

[numero uno 10]

Rockwool insulation held up with chicken wire also acts as a fire barrier would the cheapest way. Don't be tempted to block up the air bricks as your cellar will start to sweat and cause damage to timbers. Or if you have the cash get wet underfloor heating that runs off your boiler warm floor forever then.