Retro fitting external insulation on garden room

[freddiemercurystwin]

He just wants to insulate his shed a bit woody he's not building a house.

 

[cjames1984]

Me too.

It may be better to post a photo of the frame, to show what going on there.

Herea a shot of the outside and inside to give you a better idea. It's just overlapping timber, no cavity or existing insulation

 

[JohnD]

Oh, it's what my local supplier calls a "log cabin"

Each of the wide planks has a large notch near the end, so the transverse and longitudinal planks are laid alternately, and interlock at the notches.

In US, the timbers sometimes also have a tongue and groove, so each locks into the one above and below. This also prevents draughts.

I think external cladding would spoil the intended appearance.

 

[cjames1984]

Oh, it's what my local supplier calls a "log cabin"

Each of the wide planks has a large notch near the end, so the transverse and longitudinal planks are laid alternately, and interlock at the notches.

In US, the timbers sometimes also have a tongue and groove, so each locks into the one above and below. This also prevents draughts.

I think external cladding would spoil the intended appearance.

To be fair log cabin would have probably been a better description.

The main reason to insulate is to help retain the heat but there also a couple of joins starting to fail so I wanted to add a second layer of protection.

 

[^woody^]

Yes. Words matter

Do as you propose in the OP.

Bear in mind that insulation wont magically make an unheated room warm, and the air leakage from that room will be off the scale.

You are unlikely to get much benefit from anything more than a token 25-50mm of insulation, and be mindful of spending too much and getting no return

 

[foxhole]

Why do you need it heated? Whats the heat source?

 

[freddiemercurystwin]

If going the Kingspan route I would fit the foil face facing inwards, then the breather membrane on the face of the insulation then your vertical battens.