Wall Plugs Wall plugs essentially come in 4 sizes and colours. You will see various grey and other coloured plugs on the market and each have a job to do, but for the purposes of assisting you in getting a good fixing to a brick, block or concrete wall or ceiling, we will just deal with the 4 major ones. • Yellow • Red • Brown • Blue Yellow Yellow plugs fit into holes made by a 5mm drill bit and are for screw sizes 4 – 8. Red wall plugs fit into a hole made by a 6mm drill bit and are for screw sizes 6 - 10 Brown wall plugs fit into a hole made by a 7mm drill bit and are for screw sizes 10 - 14 Blue wall plugs fit into a hole made by a 10mm drill bit and are for screw sizes 14 - 18 Fixing to Plasterboard In order to fix to plasterboard you need one of the following: This is called the Redrive. It is the strongest of all plasterboard fixings. fixings: Next comes the hollow wall anchor. Again used individually these are not ideal for fixing heavy objects but as with the toggle shown next and the spring toggle below, anything that creates a pulling effect from the wall is ideally held at the top with these. Toggle Wall plug This is inserted (8mm hole for a medium toggle but always read the hole size on the packet first.) through a pre-drilled hole after squashing it flat. When a screw is inserted it goes through the hole in the back of the fixing and as you screw it, it pulls the back up to squeeze the fitting against the back of the plasterboard. Once again anything can be screwed to the wall now. This fitting is also very strong but, if used on its own, heavy items can tend to "tilt" the actual fixing in its hole and while they will not fall off, can become a little loose after a while. Ideal for shelf brackets which create a pulling force from the wall as well as a weight force downwards. Fixings for lighter loads Below are fixings used for picture frames, dado rails and general lightweight duties. Gold hammer in fixing medium load bearing Plastic high load bearing plug Plastic wall plug medium/low load bearing Screw sizes Screws come in all shapes and sizes. The larger the number of the screw, the larger the diameter. For example a number 8 screw is smaller than a number 10. 10 is the gauge number of the screw and is measured using the head of the screw rather than the diameter of the shaft. Numbers 8 and 10 are the most popular screw sizes and suitable for most fixings at home.