Steel framed Portal building

[Kevan Marshall]

Hi,

I am going to erect a steel framed garage which shall be approximately 10 metres long and 7.2 meters wide, I am going to clad the roof, sides and rear of building with 40mm insulated cladding, for the front that faces the road I want it to have a render finish to match the house (silicone render), my question is does anyone know of a insulated board that can be attached to purlins that can be rendered over, other option may be cladding with sheet wood, putting membrane on, then battens, then attach cement boards and render?

As mentioned shed shall be 7.2 metres wide, about 3 metres to the eaves and probably have 22.5 degree roof angle with a 3 metre x 3 metre roller door installed!

Shed shall be similar as image.

Kind regards,

Kevan.

[markc]

You could use cladding panels then sheet over and render, or block the walls and render.

[Nickfromwales]

Maybe thicker wood fibre sarking boards would do it. 
 

@ProDave, didn’t you render over wood fibre? 

[Kevan Marshall]

17 minutes ago, markc said:

You could use cladding panels then sheet over and render, or block the walls and render.

Hi Mark, 

I was trying to avoid block walls to keep foundations to a minimum and it’s only one wall to be rendered, I can speak to my architect so just trying to get ideas at this stage!

thank you

[Nickfromwales]

5 minutes ago, Kevan Marshall said:

Hi Mark, 

I was trying to avoid block walls to keep foundations to a minimum and it’s only one wall to be rendered, I can speak to my architect so just trying to get ideas at this stage!

thank you

Just be mindful that the finished wall will be soft, so point impact will damage it.

 

Nothing stopping you from

going a-la simple EWI methodology and whacking 120-150mm of EPS and then mesh + thin-coat system. 

[saveasteading]

For me...  have the steel z rails for the walls (pedants corner: it is only called a purlin if it is on the roof).

 

Then fix 2 x 2 timbers vertically, and cement board over them. Then render.

 

There isn't an advantage in cladding panels other than if insulated, as I wouldn't fix cement board direct to it, but would fix horizontal timber first.

Ohhh, and metal cladding would provide a slightly quicker enclosure if a few days matter.

 

[dpmiller]

maybe just buy one and then overclad the front to your preference? I dealt with C&S in Tullamore and they were very good, they make up their own panels with a shiplap style

[Gus Potter]

4 hours ago, dpmiller said:

maybe just buy one and then overclad the front to your preference?

Have done it this way many times in the past using the overcladding solution. On the face of it it seems like double work but at the end of the day you often find it's the most cost effective method.

[ProDave]

9 hours ago, Nickfromwales said:

Maybe thicker wood fibre sarking boards would do it. 
 

@ProDave, didn’t you render over wood fibre? 

Yes but I still have some unresolved issues with the render so I cannot recommend it at the moment and certainly not if you intend using Baumit render.

[Kevan Marshall]

17 hours ago, dpmiller said:

maybe just buy one and then overclad the front to your preference? I dealt with C&S in Tullamore and they were very good, they make up their own panels with a shiplap style

I shall probably still go down the route of the portal steel frame as at a later stage I want to install a mezzanine floor inside, I can install 40mm insulated roofing sheets on the roof and I can get 40mm side sheets that are flat so not like box profile, I may attach cement board the insulated cladding on the front of the garage and silicone render, I shall erect and clad the shed myself and I am going to try and do the whole lot for around the 10k mark

[saveasteading]

4 hours ago, Kevan Marshall said:

40mm side sheets that are flat

They are not as flat or planar as might be assumed. I would still fit battens horizontally.

 

Render isn't my preference for this structure really as it is likely to crack.

A steel  portal frame is designed to withstand the wind but permitted to move quite a lot.  OR you tell the designer and they make it stiffer at your cost.

Timber cladding would move with the building.

4 hours ago, Kevan Marshall said:

a mezzanine floor inside,

Self supported or using the columns? if the latter they have to be  designed for it now.

 

[Kevan Marshall]

2 hours ago, saveasteading said:

They are not as flat or planar as might be assumed. I would still fit battens horizontally.

 

Render isn't my preference for this structure really as it is likely to crack.

A steel  portal frame is designed to withstand the wind but permitted to move quite a lot.  OR you tell the designer and they make it stiffer at your cost.

Timber cladding would move with the building.

Self supported or using the columns? if the latter they have to be  designed for it now.

 

It shall be at a latter stage, I’ll get everything finished and passed by building control and the house finished and do it at a latter stage, as it shall only be 8ft by width of shed it shall need some upright columns, I’m a welder to trade so all this isn’t an issue…