Insulating shed (VCL)

I’m aware there is a garden section, but this in my humble opinion is kind of building related..... maybe

I’m planning a second 12’x8’ shiplap shed and having both as a workshop. Plan on insulating with 50mm of EPS between the framing then fixing OSB on the inside.

If I were to build the new shed to gold standards, working from the outside would go - shiplap, battens, breathable membrane, osb, stud work with insulation between, vcl, osb.

retrofitting insulation to my old shed is going to be trickier to adhere to this. What would be the problems with sticking 50mm EPS between the 2” studs right up against the outside shiplap, adding a VCL on the inside then OSB over the top. I’m doubting the shed would immediately explode, or disintegrate in 6 months, but is this proposal OKish?

I'd be tempted to build a treated stud wood frame at 600mm intervals and then clad with t&g treated facia. then add one half of a 50-75mm celotex panel in between and use plasterboard on the inside. the insulation is foil backed and if you give the t&g a couple of coats of treatment it won't leak. You can repeat for the roof and use OSB and 2-3 layers of roof roll to waterproof.

a mini version of this

I’d love to use celotex but my budget will not allow. EPS is not as efficient but a quarter of the price. Thinking about it, how much warm, moist air could get through the EPS and condensate on the inside of the T&G. That is hardly airtight so can the evaporate.....

I can’t see that being a problem for at least 10 years.

**** your shed. How’s your driveway doing a few months on?

Good as gold. Making quite a bit of money off it. Opened it up as a crazy golf course.

Here’s a couple of pics when it was just done. All planted up posh like now.

Now the house is as good as done, this leopard is changing his bodge-a-job spots. Hence the shed workshop question. Today Matthew, I have decided to be a master craftsman. Of what yet I’m not sure