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Now that the preparation work has been made, marking, and cutting the individual lengths of architraves to size can be done.
For correct installation, care must be taken that all the marking and cutting is done accurately, as making adjustments to a mitre, though not impossible, can be difficult unless you happen to be using a power mitre saw.
As for the sequences in marking, cutting and fixing, I personally prefer to mark and cut the three components before fixing, which I have found to be the easiest method, leaving the cutting points on the door casing unrestricted for marking and testing.
The first piece to be marked and cut is the head, of which it is known will have a 45 degree cut at both ends, at a length that is as yet to be determined. Begin by preparing the head piece by cutting it with a 45 degree angled cut to one end, at a length of at least 50mm longer than the required finished length. Offer this piece up to the casing head with the 'Heel' of the 45 degree cut up to the the point where the margin lines cross, ensuring that it it is also running parallel with the margin guidelines. The drawing on the right shows the architrave in this position.With the architrave firmly held in this position, mark the position of the 'Heel' at the opposite end at the exact point where the vertical and horizontal lines cross, and cut at 45 degrees.
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Now that the head has been cut to length, the two legs can be marked and cut in the same way, but with the obvious difference that these pieces will only have one 45 degree cut at the top.
Begin by cutting one leg to a length that is about 50mm longer than required finished length, and place in position resting on the floor, up to the vertical guidelines. Whilst held in this position, mark the point of the 'Heel' of the 45 degree cut where the guidelines cross, and cut it at this point at 45 degrees. The opposite leg is marked and cut in the same manner. |
| With all three pieces cut, they can be fixed, starting with the head, by placing it in position against the guidelines, with the 'heel' of the mitred corners up to the point where the guidelines cross at both ends, and drive a 38mm nail at the centre near the edge of the architrave, leaving the nail protruding. Fix another two nails about 30mm away from both ends, ensuring that it is following the horizontal guidelines exactly, (leaving the three nails protruding). Now place a vertical architrave in position, so that it is parallel, and up to the margin guidelines, and both head and leg cuts are tight up to each other, and nail the leg about at the top about 30mm away from the top cut. Nail the bottom of the vertical architrave at the bottom, about 30mm up from the floor, ensuring that it is still set to the margin at this point, doing likewise at just above the centre height |
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point of the leg (above where the latch 'Keep' is located), and then at about 300mm distances apart from the top nail to the bottom of the leg. Do likewise with the opposite side.
To ensure that at the point where the two architraves join remain flush to each other, the two adjoining cuts should be nailed together by driving a 38mm oval nail down about 15mm from the top edge of the head into the leg.
All the nails can now be driven home, and punched slightly below the surface and the holes filled with the appropriate filler. |
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