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magnetic door knocker

Sunday, September 16th 2018. | Door Knocker

There is nothing visible on the inside when surface mounting is used. If this is the first installation of a door knocker on this door either method may be used. If you are replacing an existing door knocker that has a through the door mount you will have the existing holes in the door to consider. Is it engraved? What are you going to engrave? Is your purchase engraveable? These questions need to be thought out before you purchase. It is advisable to purchase your door knocker from the same company that is going to engrave it. This way you should receive good advice as to what can be done and for how much money. You must also consider that engraving could damage the surface.

The finish should match the rest of the hardware. Door knockers not only come in many finishes they are available in many types of metal. The most stable metal and probably the most common is brass. Brass is easy to machine and cast into shapes. It polishes into a bright gold like finish or satins easily and is easy to maintain. Brass also electroplates readily. This allows it to be nickel or copper plated to simulate pewter and bronze finishes. Because brass is non ferrous it will not rust. It will tarnish though for this reason a good lacquer finish is needed or your purchase will look terrible in a very short time.

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It can be difficult to find a new door knocker with the same BC dimension. Especially if the original one has been there for many years. There is no standard for the BC dimension. The BC for the most part is determined by the design of the knocker. The mounting lugs used to attach the hardware are usually placed at a thicker portion of the casting. This is to give them more strength. Sometimes you have to settle for a replacement that is close. If the two BCs are within 1/4 or 3/8 inch of each other you can usually enlarge the holes in the door a bit to make the fit. If you are lucky the existing mounting hardware will cover the enlarged holes.

If not a larger washer will usually do the trick. If the replacement door knocker BC dimension is not even close one of the existing holes can be used but the second matching hole must be drilled through the door for the mounting. This leaves the other previous hole to cover up. If puttying and repainting is not an option I have used a third mounting hardware bolt and epoxy it into the unused hole. This gives the appearance on the inside that three bolts are used on this door knocker. This looks natural and is easy to do. The outside portion of the hole is covered by the door knocker but should still be filled with putty to prevent future problems with moisture. With a little luck you will find a matching door knocker.