Insulation around skirting

[bluebaron]

I’m building a garden room and have got my levels a bit off.

The wall is two courses brickwork (around 140mm) then wall plate stud etc

I’m planning 100mm insulation and 18mm flooring on top of the concrete base as a floating floor. this leaves me 10-20mm short of the timber wall plate. Hence I’ll be mounting the skirting 10-20mm over the brick.

I’m concerned this will create a draught with no means to insulate. Apart from raising the insulation up (can’t due to doorway). Any ideas?

I’ve done a basic diagram but hopefully you get the idea.

 

[RonnyRaygun]

Why not put 25mm Kingspan internally to floor level before applying finishes?
Ideally you’d have the insulation meet the floor insulation to stop the cold bridge at the slab edge.

 

[bluebaron]

Yep thought of that but 6x4m by 2.3m high is a big cost.

 

[RonnyRaygun]

10mm UFH insulation below wall finishes (or to match thickness of wall finishes), hidden by skirting?

 

[bluebaron]

Yep might work, so stop the plasterboard say 10mm under the skirting and then use 140mm of 12.5mm celotex in place of plasterboard to floor. (Assuming 150mm skirting).

 

[RonnyRaygun]

Yes, exactly. I used this stuff to insulate the inside of my flitch beam and around the door and window reveals on my timber frame extension.

https://www.ebay.co.uk/itm/28439634...LjRDy4VMHLA%3D|clp:2334524|tkp:BlBMUIzPmqiwXw

 

[bluebaron]

Interesting product to insulate with. I’ll look into it.

thanks