Today’s class was dedicated to moulding types and concepts. At the very beginning we quickly discussed how productive was each group’s time spent on the project last week, and how do we manage our time and set up priorities in general.
Then we moved to the shop, where Mike demonstrated how to make cove moulding on the table saw. He set up diagonal fence, and then controlled the cove height by adjusting the height of the blade, cove width – by varying fence angle, and cove asymmetry – by tilting the blade. Here is the setup:
And final product:
Mike explained that wood knots are really hard to get through when doing cove moulding. Another drawback is excessive dust that can probably damage internal parts of the saw. Then he demonstrated special adjustable jig that one can use when a large amount of cove moulding is needed:
After Mike’s demo, Sergio did a demonstration of different types of moulding used in interior design. He built a very cool wall model, and explained where each moulding is going and how it is called:
Elements are as follows: Square corner blocks that are sometimes used on the upper edges of the door(window) casing are called the rosettes. Poplar is one of the most popular moulding materials, but is kind of ugly, and often requires additional treatment. Also, Sergio showed sample moulding made of polyester, which is lightweight and probably good for scenery.
After Sergio’s presentation John showed us ‘Vin’s jig’ – adjustable jig for crown coping. This jig duplicates the intersection of the wall and the ceiling. The base of the jig represents the ceiling, while the side represents the wall. With this device one can easily determine the angle of crown at corner joint.
Then we discussed the ways to make curved moulding. The most interesting, though time consuming method was to put moulding into steam tube, leave it there for a while, and then bend it. Other ways were to use styrofoam, or to combine different materials.