Chimney insulation Information, help, tips and advice on cavity walls, ceilings and lofts etc....

[Big Red]

We have fitted a wood burning stove and have been told we need to double insulate the flue. We cant fit a doulbe insulated flue liner as we have a bend in the chimney. We need to insulate with polystyrene beads. Where can we get them from and will this work instead of a double insulated liner.

[stoneyboy]

Big Red,
You need vermiculite not polystyrene beads.
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[welsh brickie]

you can also use a company google : thermocrete flue lining

[wookey]

A bend doesn't normally prevent a flexible liner going down the chimney - just makes it a bit more awkward. Many chimneys have bends and offsets in them.

The choices are:
1) Rigid Pumice liners (will last indefinitely - you need to take out bricks for access at the corner)
2) rubber snake down chimney then pour in concrete (needs a specialist company - they have to take out bricks every two metres, should last forever)
3) flexible stainless liner. (easily DIYable, but will only last a limited time. 10-40 yrs depending how much you spend on liner and how much you use the fire)

Insulation has to be heat-proof so you can use vermiculite or Leca.

[steveo2463]

Hi
I would use Leca around a flexible liner the other system has to have holes taken out every 1.8m through out your house and is very intrusive. Micafill or vermiculite is very good however this takes time to settle.

[Big Red]

Thank you everyone for your advice. I do already have a bendy flue liner but it keeps filling at the bottom with horrible brown tar/water stuff.

I now have a new bendy liner but need to know where to get the insulation beads from. Every time I put it in the search box I keep being sent to insulation boards - insulation foam - sheeting etc etc. I know where to get beads to put in my bean bags :lol: Which doesn't help nme a great deal I must say.

So any help with known supplier sites would be a great help.

BR

[stoneyboy]

Big Red,
For vermiculite try contacting your local builder merchant.
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