The wall, which the wall lining will be adhered to, shall be even, perpendicular, smooth, resistant, dry and clean (maximum acceptable moisture as measured with the CM method shall not exceed 2,5% CM for a cement background and 0,5% CM for a gypsum background).
Installing Gamrat Forum wall lining is allowed providing that certain conditions are met:
»  all construction works shall be finished, plaster and fillers on walls and floors shall be dry,
»  you should check the tightness of the heating system, the sanitary system, and the windows,
»  the floor covering is installed with a 10cm-high skirting.
No additional works, which may increase air humidity or wall and floor moisture, are allowed in the rooms where the wall lining is to be installed.
Prior to installation you should:
»  protect all exposed metal elements (pipes, supports, etc.) from corrosion through applying a anti-corrosive layer,
»  disassemble and protect all fixed elements of furniture (wash-bowls, showers, cabins), 
»  make sure that the colour of the lining is correct, its quantity is sufficient, the covering is not damaged and was manufactured in one batch.
All the materials (lining, boards, adhesive) shall be left in the room for 24 hours. The lining shall be unrolled to allow it to adhere to the background.
The Gamrat Forum wall lining can be applied both horizontally and vertically. Before sticking the lining mark all the lines on the pre-prepared wall as per the colour arrangement plan (scale 1:1).
To assemble the lining stick the entire surface of the lining sheets to the pre-prepared wall. Use highly-durable dispersion adhesives for sticking the lining to walls. Contact adhesives shall be applied to corner mouldings and skirtings. Dispersion adhesives shall be spread over the wall surface while contact adhesives shall be applied to both faces, i.e. to the wall and the lining or moulding. After the adhesive is spread, it is necessary to allow some time until it reaches proper adhesive force.
When the adhesive reaches proper adhesive force place the lining sheets on the wall and fit them exactly to the lines marked. Take care to avoid curling and do not leave any air bubbles under the lining. Then, press the lining against the wall carefully to avoid any damage to the lining. If the background is very absorptive, ground the wall surface first.
If the lining is applied horizontally, its quantity shall be sufficient to finish the room using one lining sheet. If it is necessary to bond two lining sheets together, please follow the recommendations below.

1. External and internal corner.
It is recommended to make external and internal corners using one lining sheet. If a corner is out of the perpe-ndicular, it should be covered with the lining. The joint to compensate this deviation shall be made at min. 20 cm from the corner.
Additional recommendations:
• if it is planned to weld any horizo-ntal joints of the lining sheets, a quarter-round moulding shall be stuck to the internal corner prior to applying the lining. In this way a camber is obtained under the lining to facilitate welding.
• to fit the lining to the external corner easily, you should use a hand-operated miller to shape the bottom part of the lining in the line of folding.
To mount corners mouldings and washboards the contact adhesives shall be used. In this case the adhe-sive shall be applied to both contact faces.

Note: Do not make vertical lining joints in room corners

2. Vertical joint.
A tight vertical joint of lining sheets can be made by means of:
• hot welding,
• an overlap joint.
Another solution is to use a silicon gel of an appropriate colour.

3. Horizontal joint.
A tight horizontal joint of lining sheets can be made by means of:
• hot welding,
• overlap joint. 
In case of overlap joints the upper lining sheet shall overlap the lower one.
Another solution is to use a silicon gel of an appropriate colour.

4. End of wall lining.
Ends of the wall lining at the top edge of the lining sheet or at the door-way can be made using a silicon gel of an appropriate colour.

5. Wall-to-floor lining joint.
A tight wall-to-floor lining joint can be made by means of:
• n overlap joint-in this case the wall lining should overlap onto the floor covering.
• hot welding.
It may be used when the difference between the wall and floor lining thickness is not greater than 0,4 mm.

Description of:
• welded joint
Prior to welding the lining sheets shall be stuck to the wall without a gap. After min. 24 hours use a hand groover to make grooves along the sheet edges. Then, weld the sheets using a 3mm welding cord. Upon welding trim the excess of the cord to ensure smooth and flat surface. As the lining thickness is small be extremely careful no to damage the lining surface.
• overlap joint
The entire lining shall be stuck to the wall except one sheet, on which a 30mm-wide overlap shall be left. Use a contact adhesive to make this joint.
• silicon-gel joint
The entire lining shall be stuck to the wall with a gap of about 0.2 mm left between the edges of the lining sheets. A silicon gel shall be thoroughly introduced between the edges so that the gap is filled up completely. Remove any traces of the gel from the lining surface.