An old decommissioned chimney duct will gain to be doubled to allow to integrate it in the future decoration of the room concerned. Commonly used for the realization of thin walls, plaster brick is the ideal material for this kind of doubling. Be careful never to re-use this kind of duct, which once doubled may appear in good condition!
- Mason's decheller
- Ground tracing
- Laying bricks
1. Mark the location of the partition on the ground. The space between it and the duct is of the order of one to two bricks. Here, use of a Mason square.
2. Bastaings placed at the corners between the floor and the joists, will give cohesion to the whole during the drying of the mortar. Check their verticality with the plumb bob.
3. Spread a bed of mortar trowel at the floor location of the lining wall.
4. Place the first row by lightly tapping the bricks with the trowel. The corner bricks rest on the bastaings.
5. Use a wooden ruler as a guide, to properly align the bricks. Correct them and tamp them by tapping lightly with the trowel.
6. The offset of the vertical joints does not need to be important here it corresponds to a thickness of brick and results from the arrangement of the corner bricks. Place a bead of mortar on top of the bricks from row to row. By overflowing to the duct, it will ensure a perfect connection between the latter and the partition.
7. To cut a brick, you will use a bricklayer's decenter. Make a series of cuts to make a sharp break.
8. Introduce bricks in this way. It is indeed essential to have an entire brick at the corner. Coat the vertical edge of the brick with mortar. Periodically check the alignment of the bricks with a ruler, guiding you to the vertical bastaings.
9. Burr the top mortar with a trowel.
10. The presence of joists requires notches in the bricks. Trace them on the spot this way...
11. Execute the notches preferably using the masonry decenter used to cut the end bricks.
12. Put the slotted brick in place, bonding it with mortar, using a trowel.
(photos / visuals: © Diy-prod, except special mention)
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