Flat Screen Mounts, AV Furniture, Stands & Trolleys Sales & Consultancy
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On some modern homes and offices, rather than skimming the internal structural wall with traditional plaster, some builders use a wall-lining, commonly referred to as ‘Dot & Dab’. Effectively a plasterboard wall lining is ‘glued’ to the inner wall, proving a smooth wall surface.
When installing a large LCD, LED or Plasma screen on to a wall, then these ‘Dot & Dab’ wall surfaces can provide a challenge, to say the least. Effectively there is a gap between the plasterboard and the structural wall, this can typically vary between less than 10mm and to more than 50mm. Generally, a simple pilot hole drilled through the plasterboard should reveal the depth of the void, but if you’re unlucky, you may find yourself drilling into the ‘dot and dab’ fixing.
As always, before drilling any holes, then take care to check that there are no electrical cables or water pipes within your drilling zone. Electrical cable and water pipe detectors are commonly available in most High St. DIY stores.
Unless you’re prepared to use very large wall fixings, capable of bridging the void between the plasterboard and the structural wall, then we would advise that an alternative approach should be followed. The difficulty is that if a large bolt is secured safely into the structural wall, yet there is a large proportion of it bridging the void which is unsupported, then over a period of time, this bolt could begin to bend, resulting in the TV’s position being compromised and the plasterboard being damaged.
The clearest advice we can offer is to draw around the wall fixing part of the bracket, directly onto the plasterboard, and then cut-out this piece of plasterboard. Cut pieces of MDF or plywood the same shape and sandwich as many as required to fill the void between the structural wall and the plasterboard. Alternatively wooden blocks can be made to again fill this void, through which the wall fixings can be secured. Take care when using the second method, as if a softwood such as pine is used, these have a propensity to split, if the fixing bolts are over-tightened.
If using the first option, using the shaped MDF or plywood, then with a little help from a friend, these would not need to fixed independently of the bracket screw fixings. If these plates can be held in place by ‘helper’ then the TV mount bracket fixing screws can simply pass-through them directly into the wall. Alternatively, the filling MDF or plywood plates can be secured to the structural wall first, making sure that the positions of the TV wall mount bracket screws are not obstructed. Which ever option is used, then the work can be dressed using filler or plaster, and the covered with wallpaper or paint.
All we advise is that if at all possible, there should be something more weight bearing than just plasterboard, between the TV and the structural wall.
If you’re not sure that you have the prerequisite DIY skills, or you’re not sure if your wall is suitable for mounting a flat screen TV, then please contact a local builder
If you need more advice or guidance, please call 0845 835 0266