• Clean the concrete slab, plugging any holes, removing iron edges, concrete lumps and dirt;
• With Multimpact 5mm and 10mm, use an adhesive acoustic baseboard of 150 x 10,000 x 6mm applied at a 90° angle, 5cm over the foam and 10cm on the walls and door jambs;
• With Multimpact Plus 2mm, use an adhesive acoustic baseboard of 70mm x 10,000 x 2mm Multifilm applied at a 90º angle, 2cm on the foam and 5cm on the walls and door jambs;
• In corners and jambs that need cutting and adjustments, make and use Multifita 48mm to avoid a possible acoustic break.
• Do not overlap, tightly join the foam and use Multifita 48mm;
• In the door jambs, create an expansion with the foam between the subfloors;
• In self-leveling subflooring, reinforce it with chicken wire applied on supports that allow it to hang about 2cm from the concrete slab to then apply the subflooring;
• On conventional subfloors, follow these instructions:

Multimpact Plus 2mm Foam

A 3cm subfloor can be eliminated in areas of up to 16m²; larger areas require reinforcement and the creation of expansions to avoid cracking;

Multimpact Plus 5mm Foam

A 4cm subfloor can be eliminated in areas of up to 16m²; larger areas require reinforcement and the creation of expansions to avoid cracking;

Multimpact Plus 10mm Foam

A 6cm subfloor can be eliminated in areas of up to 16m²; larger areas require reinforcement and the creation of expansions to avoid cracking;

Layout: We recommend a subfloor layout of 1 x 3, do not use volume fillers such as EPS flakes or others, as density will be lost, affecting durability and acoustic efficiency, other layouts can be used but remain under the customer's responsibility as to its efficiency.

Wire: We recommend using screen wire or chicken wire, or higher according to the need;

Tubing: Water, air conditioning and other tubing must be embedded in the concrete slab before adding concrete or through open channels. We do not recommend putting the tubing on or under the foam, as it may cause an acoustic break, in this case we recommend that a regularization (cover) be made with subflooring over the tubing throughout the environment, and for acoustic foam to be applied over this level covering and then the final subfloor in the recommended thickness.

Separation of environment with and without foam: Separation of environments with and without insulation (expansion joint system) must be done to avoid noise transmission. This separation is created when the subflooring is laid. With the Multimpact of 2 mm or 5 mm, turn the foam at a 90° angle creating the separation between two environments, with the Multimpact 10 mm foam, cut a strip of the foam at the same height of the final subfloor, join the strip with the foam for expansion and use the Multifita of 48 mm to join and avoid an acoustic break.