FLOOR APPLICATION USING P20 (top)
	Once the membrane has been fitted to the walls and before the dry lining system is installed, the floor membrane needs to be laid. As mention earlier in this document Platon P20 membrane is recommended on floors unless there is a head height restriction, in which case Platon Multi or P5 can be used, but the installation of Platon Multi and P5 differs slightly from that of P20 and will be explained.
	Begin at one side of the room and unroll the Platon P20 floor membrane against the wall membrane with the studs facing down onto the floor and cut the membrane to the desired length or width of the floor, just like laying a carpet. Repeat this exercise till all the lengths/widths required to cover the floor area have been cut allowing for a two-stud membrane overlap. (See fig 9 & 10)
	The individual sheets of membrane that have now been cut, are joined together with Platon sealing rope. The sealing rope is positioned between the two stud formations along the edge of the membrane to be overlapped and remove the release paper. Lift the next sheet of P20 membrane over the two interlocking studs and press the overlapping membrane down onto the sealing rope. (See fig 11,12,13 & 14)
	Foot pressure can be applied by sliding the sole of the foot over the membrane joint, to ensure that the membranes are fully bonded. The next stage of the operation is to link the P20 floor membrane to the wall membrane, which can be achieved, using Platon wall/floor junction or Corner strip. Using Platon wall/floor junction, work out how many linear metres there are around the walls, the platon wall/floor junction is produced in manageable 2LM lengths with a crease formed in the centre. Fold the material in half down the centre crease and then apply Platon sealing tape along the edges of the wall/floor junction material and leave the backing paper on. (See fig 15)
	Ensure that the floor and wall membrane is clean and free from debris, dust and moisture and then position the Platon wall/floor junction with the crease into the angle. Working from the centre, carefully peel back the backing paper in each direction and use hand pressure along the taped edges to form a seal. To form internal and external angles using Platon wall/floor junction, the wall/floor Junction is cut to the centre line and bent either inwards or outwards depending on the angle. The edges are then sealed with tape to the membrane in the same manner described above. (See fig 16,17,18,19,20,21,22,23,24 & 25)
	If the one-sided adhesive corner strip is chosen to link the floor and wall membrane, the corner strip is folded in half along the length of the piece to be used and positioned with the crease into the angle as described for the wall/floor junction. Once correctly aligned, carefully pull off the backing paper and press firmly out with the palm of the hand onto the floor and wall membranes. Internal and external angles can be formed in the same manor as the Platon wall/floor junction but because it is a one-sided self-adhesive material and will stick to itself, no additional sealing tape is required. (See fig 26,27,28,29,30,31 & 32)

 

	FLOOR APPLICATION USING MULTI OR P5 (top)
	As with the P20, begin at one side of the room and unroll the floor membrane against the wall membrane with the studs facing down onto the floor. Allow for the membrane flange overlap, cut the membrane to the desired length or width of the floor. Repeat this exercise till all the lengths/widths required to cover the floor area have been cut.
	Roll out the next length/sheet of membrane and position the flange over the studs of the first sheet laid and thoroughly clean the flange and the studs where the seal is to be made as previously described for wall application. Apply Platon sealing tape to the stud area below which the flange will cover and press home onto the area between the studs.
	Flick over the flange section to cover the tape line, and check for uniformity of cover on tape line. Remove the tape backing paper, starting from the middle section of the membrane sheet, and peel off backing paper in opposite directions along the flange. On the exposed section of tape apply hand pressure only to the flange to form an initial seal. Carry on forming the seal working away from the centre of the membrane. Foot pressure can be applied by sliding the sole of the foot over the membrane joint, to ensure that the membranes are fully bonded. Sealing in this manner will prevent any buckling between the membrane or stress concentration at the joint. In very cold or humid conditions a hot air gun can be used to obtain a good sealed joint.
	The next stage of the operation is to link the floor membrane to the wall membrane, which can be achieved, using Platon wall/floor junction or Corner strip. Using Platon wall/floor junction, work out how many linear metres there are around the walls, the Platon wall/floor junction is produced in manageable 2LM lengths with a crease formed in the centre. Fold the material in half down the centre crease and then apply Platon sealing tape along the edges of the wall/floor junction material and leave the backing paper on.
	Ensure that the floor and wall membrane is clean and free from debris, dust and moisture and then position the Platon wall/floor junction with the crease into the angle. Working from the centre, carefully peel back the backing paper in each direction and use hand pressure along the taped edges to form a seal. To form internal and external angles using Platon wall/floor junction, the wall/floor Junction is cut to the centre line and bent either inwards or outwards depending on the angle. The edges are then sealed with tape to the membrane in the same manner described above.
	If the one-sided adhesive corner strip is chosen to link the floor and wall membrane, the corner strip is folded in half along the length of the piece to be used and positioned with the crease into the angle as described for the wall/floor junction. Once correctly aligned, carefully pull off the backing paper and press firmly out with the palm of the hand onto the floor and wall membranes. Internal and external angles can be formed in the same manner as the Platon wall/floor junction but because it is a one-sided self-adhesive material and will stick to itself, no additional sealing tape is required. (See fig 16 to 32 as per P20)

 

	FLOOR APPLICATION USING MULTI OR P5 WITH MEMBRANE UPSTAND (top)
	Beginning at one side of the room, unroll the floor membrane against the wall membrane with the studs facing down onto the floor, allow for a 150mm perimeter upstand and cut the membrane to the desired lengths or widths. Around the perimeter edges of the membrane, fold the membrane inward 150mm to form a positive creased upstand and pull the floor membrane into position with the formed crease sitting into the junction between the wall and floor. NB where ever the floor membrane meets the wall, an upturn must be allowed and formed as above. (See fig 33)
	Roll out the next length/sheet of membrane and position the flange over the studs of the first sheet laid and thoroughly clean the flange and the studs where the seal is to be made as previously described for wall application. Apply Platon sealing tape to the stud area below which the flange will cover and press home onto the area between the studs.
	Flick over the flange section to cover the tape line, and check for uniformity of cover on tape line. Remove the tape backing paper, starting from the middle section of the membrane sheet, and peel off backing paper in opposite directions along the flange. On the exposed section of tape apply hand pressure only to the flange to form an initial seal. Carry on forming the seal working away from the centre of the membrane. Foot pressure can be applied by sliding the sole of the foot over the membrane joint, to ensure that the membranes are fully bonded. Sealing in this manner will prevent any buckling between the membrane or stress concentration at the joint. In very cold or humid conditions a hot air gun can be used to obtain a good sealed joint.
	The next stage is to seal the floor membrane upstand to the wall membrane. An upstand formed in this manner will be a stud to stud joint. On walls all stud to stud joints are sealed with Platon sealing rope. The rope is positioned between the stud formation on the blind side of the upstand against the membrane on the wall. After positioning, the release paper is removed from the rope and sealed fully with hand pressure only. If large floor areas are started in this manner the tendency to form a curvature in the membrane can be avoided.
	Forming internal corners can be achieved by folding the upstands of adjacent walls down on top of one another. This action creates a crease in the corner and by pinching the two halves of membrane together at the crease and then lifting upward against the wall, an internal corner will be formed resembling a blanket fold. (See fig 34,35 & 36)
	To extend the membrane upstand around an external corner, the membrane upstand is cut at an angle of 45º from the bottom point of the corner. When the floor membrane is then pushed around the corner, the upstand is maintained and a 'V' shaped gap is created at the corner. The floor membrane at corner 'V' joint is then sealed to the wall membrane with Platon sealing rope as previously described and if necessary, the corner can also be reinforced with corner strip. (See fig 37,38,39,40,41 & 42)

 

	FLAT SOFFIT APPLICATION USING PLATON MULTI OR P5 (top)
	As previously mentioned earlier in this document, Platon cavity drain membrane should not be fixed to the under side of a flat soffit unless a fall exists or a fall can be created in the soffit itself. The soffit should first be measured to establish the desired lengths or widths of membrane required to cover the area and then a further 200mm of membrane should be added to the measurements, to allow for the membrane to be lapped down all the peripheral walls.
	Apply sealing rope to the Platon Brick plugs as previously described. Then around the perimeter edges of the membrane, fold the membrane inward 200mm to form a positive creased and create a down lap. Offer the membrane up to the soffit and position the down lap creases into the junction between the soffit and wall.
	Drill and fix enough Platon brick plugs through the membrane and into the soffit to hold the membrane in place with the studs against the soffit. NB where ever the soffit membrane meets the wall, a 200mm down lap must be allowed and formed as above.
	Offer the next length/sheet of membrane up to the soffit and position the flange over the studs of the first sheet, fix and secure the membrane as described above. Repeat this operation until all the membrane sheets are held in place. Thoroughly clean the flange and the studs where the seal is to be made as previously described for wall application. Apply Platon sealing tape to the stud area, which the flange will cover and press home onto the area between the studs. The membrane should now be sealed to form one continuous sheet, Platon brick plugs can now be fixed through the membrane, in positions to accommodate the chosen dry lining system. NB it is important to ensure that the membrane is taut against the soffit and doesn’t sag, otherwise water ponding will occur and the membrane/seals could fail.
	Internal and external corners are formed in exactly the same way as that which has been previously described in ‘Floor application using Multi or P5 with membrane upstand’ except in this case, they will be formed in reverse and be upside down.

 

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