Maps and plasters (joints)
The water and room temperatures must be above 5 ° C
Preparation:
Mixing rate: 11 to 13 liters of water per 25 Kg bag
Use clean water in a cleaned container.
Manual or mechanical mixing.
Never reshuffle the mess
1
2
3
-1 Roll of fiberglass adhesive joint tape. It allows the joints to be made between the plasterboards flat, using a technique different from that recommended in the DTU. Please note that this type of tape is not authorized in the ceiling.
-2 Roll of special micro-perforated kraft paper tape, ground on one side and grooved in the center. It is intended for making flat joints and those of re-entrant angles,
-3 Reinforced tape, Roll of tape in special paper reinforced with two flexible steel strips, coated with alu-zinc It is used for the protection of projecting angles,
The map (adhesive mortar) must be done in a clean bucket. It is used to plug the holes before making the joints (clearance greater than 4 mm), to glue the plates against the walls and possibly sealed the boxes for the sockets in the concrete.
It must be well kneaded so that the glue is homogeneous, not too hard, not too liquid.
Best of all, it should fit on your spatula without dripping.
To make a full bucket, fill it halfway with clean water and then add the powder.
The coating must be done like the map, not too hard, not too liquid.
You have to put the plaster on the plate (5 mm thick enough), but spread it well over 10 cm wide.
Lay the strip on the plaster and, starting from the middle, tighten the strip upwards and then downwards.
Let it dry, wait a day, iron the first coat and so on until it is smooth and the strip is no longer visible. For a salient angle, use the armed band.
The scrap should be against the plasterboard and not on the outside!
Adhesive mortar map
to fill the holes
Joint tape plaster,
slow setting
Joint processing steps are
the following :
- Coat the bottom of the hollow formed by the edges.
- Install the joint tape
- Tighten the band
- Coat the tape
- Leave to dry then cover with a
another layer of coating
Do not overlap joint strips
The drying times of the seals depend on the products and the ambient conditions.
The order of the bands,
to the extent possible.
First the verticals, the bands on the ceiling, then the angles between ceilings and partitions (which
said to be picked).
The operations are carried out by folding the strip beforehand.
Then finish with the angles coming out with the reinforced tape (the roll with the scrap in it).
1 layer
2 layers
3 layers
CLASSIFICATION:
LEVEL III - PROFESSIONAL JOURNEYMAN
Armed band
Metal corner angle for large passage
Expanded metal plaster ridge
Expanded metal corner reinforcement for
protection of salient angles of structures
in plasterboard.
Length 2.50 m
Galvanized perforated corner angle
Metal corner brace for protection
salient angles of plate structures
of plaster.
Length 2.50 m
Always make the joints
with a lighthouse in shaving with
plasterboard (500w) or led
Folded flat strip is cut on one fender
Flat strip on the drop down and the perforated ceiling
Vitam St Julien shipyard in Geneva
Coating sanding
it is best to use sandpaper with a grain between 80 and 120 mm for good sanding and 120 to 200 mm for finishing.
abrasive materials
The small abrasive grains are bonded to different types of support:
-Nylon fiber for self-gripping sheets on machines or on certain sanding blocks.
-Cloth ; it is suitable for curves or moldings because it breaks less than paper.
-Paper more or less thick depending on machine or manual use.
Sanding with a giraffe, uh!
The giraffe sander gets its nickname "giraffe" from its long "neck" or telescopic pole.
These attributes prevent the use of a stepladder or step to perform vertical or horizontal work.
The giraffe sander, be careful not to sand the joint tape!
Sanding is probably the most unpleasant work in the preparation of bases
because of the dust generated and the fatigue caused by the gesture.
For a nice finish
- Application of finishing coatings
will only be considered after 7 days
minimum drying of the joints in
natural atmosphere (suitable drying
structures at joints)