How to mount a heavy rangehood?

[Buuzaster]

Hi there, 

I'm desperate for some advice and help please! 

We are replacing our old rangehood with a heavier, higher performer about 35kg. Our house is steel frame with 2 vertical stud far apart, so the original workaround was our builder has installed thin metal sheet nogging "partially" covering the area. 

 

The old unit is pretty light weight about only 10-15kg but this new unit is a monster. 

We should be able to get 1-2 screws to metal sheet nogging but some just on hollow plasterwall. 

To add to the level of difficulty, we have just freshly tiled the entire kitchen splashback. Total thickness plasterboard 12mm + tile 13mm. So unfortunately there's no real option to cut through the wall to add more nogging. (I'm crying my eyes out)

 

So my questions are:

- what will be the best heavy duty anchors to use for metal sheet nogging? 

- what will be the best heavy duty anchors to use for hollow plasterwall? 

- will it be okay to hang something so heavy partially on noggin and partially on hollow wall? 

Thank you heaps!! 

[Dave-1]

Evening @Buuzaster 

to the other parts being sorted.

"With metal sheeting splashback, do you mean to put on top of the tiles covering the entire width of the 2 metal studs, then mount hood to the metal splashback?"

Yes this is what I mean, but have the metal sheeting splashback cover the two studs but to "make" it look centered. So one side could be overlapping the stud by 100mm and the other side 300mm but the whole lot looks centered above your stove.

Having it as a splashback could make it seem that is how it should be, you could evengo as far as to have it extend to the top of the stove for a more uniform look butthen you would be covering your nice tiles. 

Dave

[Buuzaster]

Hi @EricL 

Ahhh thank you Eric! 

Still a newbie here! Didn't realise I need tag  

Hi @Dave-1 and @Nailbag 

Thank you guys so much for helping out! I have responded to both replies

[Nailbag]

Hi @Buuzaster 

thanks for sending through the diagrams, though they don't cover the installation information.

Ideally the wider section of the RH has fixing holes to the wall that would cover across two of the metal studs. Though this may not be the case as it needs to be central to the stove top. Now the tile splashback are laid I'm assuming you may not know where the struts are now? 

So, this is how I would deal with the install:

• Mark out the widest part of the RH on the wall.
• Position something like a large heavy duty tub on the benchtop and pack it evenly underneath until you obtain the lowest resting height of the RH.
• Rest the RH on top and mark out the fixing holes. Remove the RH
• Drill 8mm holes through the tiles and insert these fasteners. Each have an 11kg load capacity which will be shared over each fixing point. The bit I linked to isn't cheap, but will last! Use a drill on medium speed and expect to go through the tiles, adhesive then cement sheet. If you hit a metal stud then switch out the fastener for a self-drilling metal screw to match the RH hole opening.
• Reposition the RH and install the crews.

Nailbag