Application Instruction of Bimeq® Membrane
Hydro-insulation works should be performed in good weather conditions (dry) with the most advantageous temperatures from +5 to +30°C (optimal temperature: 16-20°C). Membranes should not be stored, cut and laid in high temperatures (above 30°C) and direct sunlight. Membranes can be laid in low temperatures but they are not as flexible as in optimal temperatures and that is why it is recommended to place them in a heated room 24 hours before they are installed and to expose them to sunlight during installation. In low temperatures it is also recommended to strengthen the gluing on the overlaps by heating the overlaps with a heat gun. In low temperatures (below +5°C) make sure that it is free from frost and ice. The surface should be evened (rock pockets, holes after framework braces should be filled), without cement slurry, sharp edges, cracks, protrusions, loose aggregate (the surface should be well swept or vacuumed). Uneven walls (e.g. constructed of concrete blocks) on which the contact surface is lower than 80% should be evened with mortar. While gluing the membranes, special attention should be paid to the overlap surface to be free from dirt and dust. Dirty spots on the foil should be wiped with a slightly wet cloth before the next membrane strip is glued. Any mortar stains should be removed from the strip footing as they can get detached and locally loosen membrane gluing. In the places where strip footing is connected with foundation walls, a facet made of a sealing profile or any type of fast-setting mortar with the radius of 3cm should be installed (Fig. 1).
Rubber roller, tar brush, sharp knife, paint brush, wooden pad
Mineral surfaces must be primed with the primer solution Bimeq® PRIMER (Fig. 2). The priming solution penetrates into the surface structure (its penetration is the more efficient, the dryer the surface is), closes the pores, and forms a sticky layer to which the membranes are firmly glued. The primer should be left to dry, the drying time depends on the temperature and the humidity (the primer should be sticky but it cannot be wet). The consumption depends on the temperature and on the surface. The surface primed should be covered with membrane on the same day because the dirt and dust accumulating on it decrease its adhesive properties. In low temperatures, membranes should be glued as soon as possible, immediately after the primed surface dries sufficiently.
Before removing the protective paper cover, the membrane should be cut to the required length and width and rolled back. It is recommended to use a sharp knife and to cut the membrane, for example, on a wooden pad (Fig. 3). Exposure to direct sunlight should be avoided.
Laying membranes vertically
Before laying membrane strips on vertical surfaces, 20cm strips of Bimeq® STRIP (Fig. 4) should be put in the primed corners, angles, and on the facets, which means that there will be 2 membrane layers in the most risky places after the membrane strips are glued onto the walls. In the primed corners, you should first install a 20cm strip (Bimeq® STRIP).Then, remove the protective paper cover from about 50cm section of the membrane strip and glue it to the upper part of the wall, pressing it firmly. Remove the protective paper cover gradually from top to bottom and glue the membrane strip pressing from its middle out to the sides in order to remove the air (Fig. 5). The next membrane strip should be glued in the same way with 5 cm overlap and the overlap should be pressed firmly, preferably with a rubber roller (Fig. 6 and 7). In corners, glue the Bimeq® STRIP tape onto the corner (10cm on each side) or glue the membrane strips so that they overlap (20cm overlap in the corner) (Fig. 8).
Connection with horizontal insulation
Horizontal insulation should be laid, among others, 10cm outside of the wall edge and glued onto the vertical insulation. In order to protect the membranes against mechanical damage, foundation walls should be secured with drainage boards (additional advantage – water drainage), polystyrene boards (additional advantage – thermal insulation) or cover boards. Protection with the boards mentioned above or excavation covering should be applied as soon as possible.
Laying membranes horizontally
Gluing membrane strips horizontally should be started from the lowest place and continued crosswise or horizontally in relation to the surface slope after the membrane strip is unrolled and cut. In order to make the work easier, you can partially roll the strip back, remove a 50cm section of the protective paper cover from the top of the strip and glue the top of the strip firmly to the surface. Gradually remove the paper cover and glue the membrane with 5cm overlaps with the help of a brush, moving from the middle to the sides of the strip in order to remove the air. The 5cm overall should be firmly pressed with a rubber roller (Fig. 7).
Firstly, the opening should be primed (Fig. 9a). In order to reduce the difference between the diameter of the opening and the pipe diameter, wrap the pipe tightly with the Bimeq® STRIP (Fig. 9b). Seal other irregular openings by pushing the sealing material made of a sealing compound firmly into them. Make round cuts in the sealing cuff (Fig. 10) in accordance with the pipe diameter, place the pipe and firmly press it to the sealed opening and to the wall (Fig. 11). Finally, wrap the pipe tightly with two layers of the Bimeq® STRIP as close to the wall as possible (Fig. 12).
Any accidental damage can easily be repaired by gluing a patch cut out of a membrane strip or made of Bimeq® strip onto the hole or the crack using overlaps with the minimum width of 5cm – that is 5cm should be added in every direction from the place where the insulation discontinuity is located. If the diameter of the damage is, for example 1cm, you should cover it with a square patch whose side is at least 11cm long.
Packaging and storing
The membranes are available in 100cm wide and 10 m long rolls (24 rolls in cardboard boxes per 1 euro pallet). The product should be transported under cover, stored in dry rooms (protecting from UV) at the temperature of 5-40°C in a vertical position in the original packaging. Best to use within 24 months from date of production.