An MF ceiling system is suitable for most internal dry lining applications. Using this system, the fully concealed grid and ceiling lining combine with plasterboard to create a seamless appearance.
The following steps will show you how to install this type of ceiling and achieve a smooth, high quality finish.
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Setting the Ceiling Level
As with all projects, getting the foundation right is important. With this in mind, ensuring the ceiling is level and at the required height is the first task.
Use a laser, spirit or water level to mark the required height on your wall, and replicate this on all remaining walls.
Installing the MF6A Trim
The purpose of the MF6A trim is to hold the MF5 in position. It provides a finish to the wall for the plasterboard.
The MF6A should be attached to each wall at the required level using an appropriate fixing such as a drywall screw, plastic hammer fix or metal nail-in. The fixings should be centred at no more than 600mm centres.
Creating the Hangars
Cut the MF17 suspension angle to fit the top of the MF6A. For example, if the MF6A is 450mm from the void, then make the angles 450mm long.
Drill a hold in one end and attach the MF16 angle bracket using the MF15 nut and bolt.
iNSTAlLING THE hANGARS
The suspension hangars take all the weight of the ceiling and the layout of the hangars need to be planned in advance. The first fixing point needs to be a maximum of 450mm from the wall - this will be your starting point. Once marked, take an appropriate fixing and attach your hangar to the void. The additional fixing points are then placed at a maximum of 1200mm centres in each direction. All fixing points adjacent to walls must not be any more than 450mm on all walls. As a final check, ensure each fixing is tightened and pull it to ensure it is fixed correctly.
Installing the MF7
Offer the MF7 up to the hangar, with one edge resting on the MF6A. Attach the MF7 to the hanger, and clamp to hold position. When you're happy it is level and in position, fix using an MF20 Wafer Tek screw. Continue this installation until you have rows of channels all fixed into position.
Installing the MF5
Clip one end of the MF5 into the MF6 at a right angle and attach the MF7 channel already installed, and offer up to the underside of the MF7. Place an MF9 clip over the back of the MF7 and clip it onto the MF5. To make this task easier, squeeze together gently the MF5 and use a second MF9 clip to drag it round and into place. Make sure you hear it snap into place and that the leg of the clip is tightly located. Continue this process by placing additional MF5 sections parallel to the others. The first MF5 should be placed a maximum of 150mm from the parallel wall and 450mm from the next MF5 if using 1800 x 900mm plasterboard.
Extending the MF5 to a Wall
It's likely that the MF5 will not stretch to the exact width of the wall and you will have to join two pieces together.
Take a measure from the wall and add an additional 250mm. Cut the MF5 using a suitable tool, place in position and fix using an MF20 Wafer Tek screw.
Extending the MF7
It's also likely that the MF7 will not stretch to the exact width of the wall, meaning you will need to join two pieces together. Take a measure of the length required and add an additional 250mm. Clamp this into position and fix using the MF20 Wafer Tek screws.
Fixing the MF5 to the MF6A
You should now have a metal framework in place. Double check each MF9 clip is tightly secured and that each MF5 is parallel with the next at 450mm centres.
You can then secure the MF5 into the MF6A with an MF20 Wafer Tek screw. This should be done on every fixing point.
Fixing the Boards
Take a measure from the edge of the wall to the centre of the MF5 and cut the board to the correct size. Using a helper, offer the board up to the metal framework and begin installing the MF14 25mm drywall screws through the plasterboard and into the MF5. Continue down the length of the board at a maximum of 300mm centres.
Continue fitting all the boards until the framework is completely covered.
Insulation can be easily fitted within the framework of the ceiling to provide additional thermal, acoustic and fire performance, prior to the boards being installed.
Additional Plasterboard Layer
An additional layer of plasterboard can be fitted to further increase the performance of the ceiling, simply by following the rules for a single board; staggering the boards so the joints overlap.
Installing an Access Panel
After skimming the ceiling you may require access to services behind it. If so, fitting a plastic access panel is a cheap and easy method.
Mark on the plasterboard where you want the panel to be and cut a hole slightly bigger than the frame of the panel, being careful not to damage any of the steel framework behind.
Apply a bead of adhesive around the edge of the frame and fix into place. The door can be opened to provide full access to the services behind.
Paint & Finish
Once the ceiling has been skimmed and necessary access put in place, both the ceiling and any access panels can be painted as required. You should now have a smooth, high performance ceiling and can stand back and admire the job.
To see this project being completed in more detail, watch the video below. Keep watching until the end for details of how to receive your special video discount voucher.