Mounting a microwave on a wall bracket or under a cabinet

Which bracket or mount to choose

Start with the microwave's weight, printed on the label inside the door or in the manual, and add the weight of a full plate of food and a mug, since that is the load the bracket sees in real use. A wall bracket rated for at least twice the microwave's weight is a sensible margin, not overkill.

For a standalone microwave, a fixed wall bracket with a flat steel plate and a lip at the front is the simplest option and works in almost any kitchen layout. An under-cabinet mount, which screws into the base of a wall cabinet and lets the microwave hang below it, suits kitchens where the cabinets are solid and there is no wall space at the right height.

Combination microwaves with a grill or convection function run hotter and are heavier than a basic model, so check the bracket's rated load again if you are replacing an older, lighter microwave with a newer, larger one.

The wall material decides which fixings you need

In a Soviet-era panel block the wall is often concrete or a dense concrete panel, which takes a standard expanding wall plug and screw well once you drill with a hammer action and a masonry bit. In newer developments, partition walls are frequently aerated concrete or gypsum board on a stud frame, and these need different treatment.

Aerated concrete holds an ordinary plug poorly under a pulling load; a long plastic frame plug or a chemical anchor made for aerated concrete gives a far more reliable hold. On a plasterboard stud wall, always aim to hit the timber or metal stud behind the board rather than relying on cavity fixings alone for something as heavy as a microwave.

If you are not sure what is behind the tiles or plaster, a small stud detector or a test hole in an inconspicuous spot tells you more than guessing. Getting the fixing wrong here is the single biggest risk in the whole job, since the bracket itself is rarely the weak point.

Steps for fitting it

Mark the height with the microwave's door open in mind, since you need to reach in comfortably without stooping or reaching above shoulder height. A worktop-to-bracket height similar to where the microwave would sit on a low shelf usually works well.

Hold the bracket level with a spirit level, mark the fixing holes, then drill and insert plugs suited to the wall material as above. Fit the bracket with the screws provided or slightly heavier ones if the wall is soft, tightening evenly so the plate does not sit skewed.

Lift the microwave onto the bracket with a second person if it is bulky, since misjudging the angle on your own is how brackets get bent or knocked out of true. Check the appliance sits flat and does not rock before you plug it in and run a short test.

Ventilation and clearances you should not skip

Every microwave has vents, usually on the sides, top or back, and covering or crowding them causes it to overheat and can trip its internal cut-out. The manual gives exact clearances, but as a rule of thumb allow a clear gap above and behind the unit and do not push it flush into a corner or under a shelf with no gap at all.

If you are fitting it under a wall cabinet, check the cabinet base is not directly blocking a top vent, and leave the same side clearances you would on open wall space. A microwave that runs hot to the touch on the casing after normal use is a sign the gaps are too tight.

• Check vent positions on your specific model before marking bracket height
• Leave clear air space above, and behind if the back panel vents
• Never enclose the microwave on more than two sides
• Keep the door's swing radius clear of a hob, kettle or windowsill

The mistake most people make

The most common problem is fixing into plaster or tile adhesive alone, missing the solid wall or stud behind it. The bracket looks secure for weeks, then works loose under the repeated weight of the door being opened and closed, and eventually the plugs pull free, sometimes with the microwave still on it.

The second most common mistake is mounting too high for comfortable, everyday use, which is hard to fix once the holes are drilled and filled. Stand at the counter and mime opening the door and lifting a dish out before you commit to a height, not after.

When it becomes an electrician's job

Mounting the bracket and hanging the microwave is a DIY-level job for most walls. It turns into an electrician's job the moment the existing socket is in the wrong place for the new position, buried behind where the microwave will now sit, or too far for the cable to reach safely without running it across a worktop.

Moving a socket, adding a new one, or running cable inside the wall is electrical work and should go to a qualified electrician rather than being improvised with an extension lead behind the cabinet. If you would rather not deal with the bracket and fixings yourself, our appliance installation service starts from 55 € per job, and general wall fixing for shelving or mirrors is charged from 39 € per hour.