Perfecting Plaster |
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Flat Floors How to keep floors flat when using plaster blocks. |
Flat Walls How to keep walls straight using plaster blocks. |
Round Walls How to make neat round towers using plaster blocks. |
Buildings with Flat Walls (Images to follow) |
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Materials and Equipment Flat work surface - a glass worktop saver is ideal Lego to keep blocks square Clamps Blocks PVA (white glue) |
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Step 1 Make a strip of Lego blocks as long as your wall and clamp to one edge of your board. Make 2 "L" shapes from Lego to act as set-squares. |
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Step 2 Lay out your wall blocks dry (without gluing). If you have any variation in size, try to select blocks so as to minimize any unevenness. Build the wall upside-down, with the top against the Lego straight-edge. |
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Step 3 Place packing blocks in any spaces like window or door openings. I usually leave the untextured side facing upward to remind me not to glue these, but you could mark them with a blob of paint. |
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Step 4 Create finger joints at each end of the wall and add packers in the spaces. |
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Step 5 Build the wall upside-down, with the top against the Lego straight-edge. Glue the blocks together with PVA, taking care not to glue the packers. Use the Lego set-squares to keep the ends perpendicular. Leave to dry for an hour or so. |
Step 6 Whilst the first wall dries, you can begin to dry-stack the blocks for the other walls on another board. |
Step 7 When dry, carefully remove the packing from the finger joints of the first wall. Set the blocks of the second wall beside the first, and change the blocks for the second finger-joints if the fit is too slack or too tight. |
Step 8 Glue these blocks in place ensuring you do not glue the two walls together. Use a set-square once again to ensure the end is perpendicular. |
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Step 9 Add the third wall at the other side of the first, dry wall. Leave the new sections to dry for an hour or so. |
Step 10 Mark the joints then carefully separate the three walls at the joints. Now put the two side walls on the board with the unmarked ends closest, and stack the blocks for the final wall between them. |
Step 11 Glue the final wall and leave everything to dry for several hours - preferably overnight. |
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Step 12 Stand the wall on its upper face. Slightly separate the joints, and carefully twist the side walls into rough position. |
Step 13 Slide the final wall into position, add glue and close up all the joints. Use the Lego blocks once again to ensure the corners are square. |
Step 14 If the new building is a section of a larger structure, set the finished section in position on the existing model to ensure all the walls align nicely. Allow the glue in the joints to dry. |
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Step 15 Once the joints are thoroughly dry, you can sand the bottom edge of the new piece if needed. |
Buildings with Round Walls (Images to follow) |
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Materials and Equipment Flat work surface - a glass worktop saver is ideal Former (see Step 1) Elastic Bands Blocks PVA (white glue) |
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Step 1 To make circular towers, you need some kind of former to build the blocks around. Food and drink tins and bottles can be a good starting point for these, and you can wrap card and tape around them till you get a former with the right diameter. |
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Step 2 I think the easiest way to keep this kind of model neat and square is to split it into a series of layers. I make rings of two or three courses of blocks around a former and leave them to set before continuing. This way you can easily add internal details like stairs before gluing the sections together. |
Step 3 Lay out your wall blocks dry (without gluing). If you have any variation in size, try to select blocks so as to minimize any unevenness. Build the wall upside-down, with the top against the work board. |
Step 4 Place packing blocks in any spaces like window or door openings. I usually leave the untextured side facing upward to remind me not to glue these, but you could mark them with a blob of paint. |
Step 5 Glue each layer together and place an elastic band around it to hold everything in place. Allow the glue to dry for an hour or so.
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Step 6 Remove the elastic bands first, then slide the completed section off the former. For all layers after the first, place the section in situ on the previous piece to ensure that everything lines up correctly. Leave overnight before continuing. |
Step 7 Add any internal details to the rings - stairs, floors, decorations etc. and leave to dry. Once again, leave the sections upside-down so that the upper surface is nice and flat. |
Step 8 If you will be able to see the inside of the model, paint the inside of each ring now, whilst it is easy to access. Leave to dry. |
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Step 9 Before gluing the sections together, dry-stack them. If needed, you can now sand the bottom of any ring which doesn't fit nicely. |
Step 10 Glue the sections together and leave to dry. If you have parapets or other features which stick out from the building, add them at this stage. |
Step 11 Paint the exterior. |
Contact me with suggestions, comments or questions.
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