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I have a brick shed its 2900 by 1900 hight 2.8m i will like to know what can I use to insulat the 🧱 wall to keep the heat out? what can I use other than plasterboard wont make the room smaller from the inside so I can hang a tv on the wall and what should I use for concrete floor tiles -vinyl tiles or timber
Hello @Nuggets
Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about how to insulate your brick shed.
I'm aware that this suggestion will take space from your brick shed. But the best way to properly insulate your shed is to install a timber stud wall that can hold standard batts. I suggest having a look at this discussion - How to build framing inside a brick garage by @Amatuer84. There are some excellent links mentioned in the discussion that will help you build a stud wall.
The best part is that because you have a timber stud wall installing the TV to the wall will not be an issue.
You mentioned that you are not keen on using plasterboard my suggestions are to use 2500 x 1250mm 12mm OSB Panel - 12mm or plywood. In regards to your flooring, I suggest looking at installing Floor Select 6mm 2.2m² Blackbutt Hybrid Waterproof Flooring.
Here is a handy step-by-step guide: How To install Insulation In Walls
Let me call on our experienced members @Dave-1, @Nailbag and @AlanM52 for their recommendations.
If you need further assistance, please let us know.
Eric
Good Evening @Nuggets
Now that is an interesting problem 
If we add anything to insulate the intereior of the room it will fast become only 1800mm wide at best or more likely 1750mm wide....
So I am going outside the box 
and yeah I see the pun. So instead of insulating the brick wall itself to keep the heat out, how about we insulate the brick wall from the sun itself.
You may have seen vertical diagonal slats covering windows when driving about, its to keep the suns rays off the windows and give privacy at the same time. I am thinking of two ways you could do the same depending on the space you have around your shed.
Make a rectangle frame of H3 timber up to cover the outside wall. Then using merbau timber or a 20mm thick H3 rated outside treated timber and screw slats that are skewed 45degrees to the edge, so it kind of looks like a large cheese grater. Space the slats so each new slat lines up like the teeth on a hacksaw blade. IRWIN Wood Hacksaw Blades - 10 Pack if you zoom in you can see the teeth, I am suggesting to have the slats lined up liek the teeth, This is to stop the sun directly hitting the bricks, insulating it from the outside type deal.
I can draw up a sketch tomorrow if its hard to picture.
As an alternative you could use the same rectangular frame and install SpecRite 1800 x 902mm Pre-Oiled Merbau Alternating Slat Fence Panel over it (leave the bottom 500mm empty and the top 500mm empty) to save doing the whole wall. Lattice Makers 2400 x 600mm Mahogany Hardwood Lattice Panel would be third choice but think it wouldnt stop the sun enough.
The last part to insulate would be the roof inside, We cant see the makeup of it but if its tin then something will be needed to be installed to hold up some insulation bats at the very least.
The Tv can be mounted to the brickwork directly, you could paint the walls or go for the OSB panel direct on the brickwork.
Dave
Hello @Nuggets
You could look at easycraft 2400 x 1200 x 9mm easyVJ100 Wall Lining Primed General Purpose MR MDF E0 or Ekodeck 219 x 26mm 3.6m Hazelwood Batten Screen Castellated Panel along with cement sheeting.
Eric
Good Afternoon @Nuggets
So the frame is just a rectangular frame screwed together. (70 by 35mm or 90 by 45mm H3 timber)
The diagonal slats are fixed in place via screwed trhough top and bottom. They diffuse the sunlight gettingthrough the slats.
The green arrows are for fixing the frame to the brick wall via some masonary screws. I would also fix the horizontal rails.
The Bottom left of the sketch shows what a top down look at how the slats are installedinthe frame.
Note - Change the way the slats are diagonal depending on which way you recieve the majority of your sunlight from.
Dave
