The Drywall Linings are completely dry systems for drylinings the walls. They are made of metal substructure over acoustic vibration brackets, heat insulation layer and gypsum boards. High fire and moisture resistance could be acheived by using cement fiber boards BETOPAN or BoardeX. With it rough walls could be smoothened, and the heat and sound insulation could be increased. The qualities of these systems are result of the combination between construction, gypsum board, joint details, insulation materials etc. They could be:
Independent Wall Lining – system LW625,
Dryliner, Standard Reach Frame – system LW623
|1. Gypsumboard Lafarge Dalsan 12.5mm|
|2. UD track ceiling profile|
|3. CD channel ceiling profile|
|4. PVC дюбел|
|5. Direct hanger for CD|
|6. Self Taping Screw LB25|
|7. Joint Tape|
|8. Light Joint Filler DERZTEK|
|9. Mineral Wool RIVATHERM|
System LW623 – drywall lining with ceiling profiles, single planking:
The UD 28/27 track profiles are fixed with dowels on the needed distance from the wall on the floor or the ceiling. For better sound insulation the distance from the wall should be at least 50 mm. Before the profile fixing over it a joint tape is stuck. For strengthening of the CD 60/27 channel profiles on the half of the wall height (maximum distance 150 cm) acoustic vibration brackets or direct hangers are fixed using dowels. The joint tape under the acoustic vibration brackets prevents the direct surface contact. The CD 60/27 channel profiles are put in the UD 28/27 track profiles and the distance between the axis is 60 cm. CD 60/27 channel profiles are leveled and screwed to the brackets using type-s screws LA 4.2/15 mm.
System LW625 – Independent drywall lining with wall profiles, single or double planking:
LW625 Independent Wall Lining System combines the features of other wall metal systems to give high strenght and quickly assembled drylinings. The difference from LW623 system is that as metal subconstruction the CW and UW wall profiles are used. In this system no acoustic brackets or directs hangers are used. Everything else is like in LW623 system.
Set out the Independent Lining System LW625 behind the external wall construction, allowing a minimum cavity width of 30mm between the extarnal wall and the adjoining face of the drylining, taking into account the thickness of the insulation which may be greater than thw width of the framing.
Fix UW track wall profile to the floor and the structural soffit at 600mm centres. If applying the floor track direct to new cocrete, the concrete must be dry, and a damp proofing membrane should be used. On uneven floors a timber sole plate may be required.
Cut CW studs 5mm shorter than the floor to ceiling height to allow for floor variations. Insert the studs into the floor and ceiling tracks and twist to to lock, positioning them at up to 600mm centres. Arrange the framing so that board widths of less than 300mm are avoided. Use CW stud wall profiles for the main run of the wall lining, stop ends, junctions, openings and crners.
If services are to be run behind the lining they should be installed at this stage.
Insert RIVAtherm glass mineral wool into the framing within the flanges of the studs and the tracks. Ensure that they are fully inserted into the framing, and that the cavity between the lining and the external wall is maintained.
Cut gypsumboard 5mm to 8mm shorter than the floor-to-ceiling height, butt firmly against the ceiling and fix to the framing with Drywall Screws. Butt board edges lightly against each other and centre edges of the gypsumboard over the studs.
Finishing drywall has three steps to it:
1) Filler Coat:The surface of the boards is cleaned and the joints are filled with jointing compound DERZTEK. It is strongly recommended the usage of glass fiber joint tape, no matter the type of the joint filler. This increases two times the strength of the connection and is the best protection against cracks. When dry, the surpluses of jointing compound are removed with sandpaper. Sand with 120 or 150 grit Sanding Paper.
2) Second Coat: The joints are coated and sanded a second time 24 hours after the first coat.
3) Finish Coat: After another 24 hours, for perfectly smooth surface SATENTEK might be used. If done properly, this last coating should have no need of sanding.
Tip: In order to work from easiest joints to hardest, follow this order for applying the joint compound: start with nailheads, then valley joints (the longitudinal joints), inside corners, outside corners, and lastly the butt joints.
In case of buildings under protection such as culture monuments and also in cases where a probable exterior insulation could change a priceless facade, characteristic of the building, an interior insulation takes attention. Each case must be treated as a single.The advantage of the interior insulation is that the installation could be made consecutively, room after room.The interior insulation is cheaper than the other types of insulation and the installation could be made by a non-professional builder if he is filled in the construction – physical prerequisites. It is understandable that in case of interior insulation the inner surface temperature of the walls is increased, because they are formed by coating of the insulation layer. This helps for the healthy climate in the room and it is also warmed up quicker. It is recommended that the installation of the interior insulation is made by a qualified company. It is still possible for a single person to do part of the work to lower his expenses.