DESIGN GUIDE ARCHITECTURAL SOLUTIONS THERMAL INSULATION ADHESIVES • SEALANTS • CHEMICAL PRODUCTS FOR BUILDIN

Procedure L.1.2 OLD STONE OR BRICK MASONRY BUILDINGS Procedure L.1.3 NEW BUILDINGS WITH UN-RENDERED MASONRY Procedure L.1.4 BUILDINGS WITH RENDERED MASONRY Procedure L.1.5 BUILDINGS WITH CRACKED MASONRY Procedure L.1.6 BUILDINGS WITH CONCRETE WALLS Procedure L.2 PREPARATION WORK PRIOR TO INSTALLING THERMAL INSULATION SYSTEMS Procedure L.2.2 APPLICATION OF STARTER PROFILES Procedure L.3 INSTALLATION OF THERMAL INSULATION SYSTEMS L.3.1 Bond using two-component paste adhesive Procedure L.4 APPLICATION OF REINFORCED SKIM COATS L.4.1 Smoothing surfaces using two-component paste adhesive Procedure...

L.1 PREPARATION OF THE SUBSTRATE L.1.1 INTRODUCTION Procedure Thermal insulation systems must be installed perfectly and strictly according to technical specifications. As a general rule, the following guidelines must always be followed: - the installation surfaces must be flat, mechanically strong, free of any areas at risk of detachment, perfectly clean and free of all traces of dust, dirt, grease, stripping compound and any other substance which may compromise the bond of the adhesive to the substrate. - thermal insulation systems must never be applied on masonry suffering from capillary rising...

L.1 PREPARATION OF THE SUBSTRATE L.1.2 OLD STONE OR BRICK MASONRY BUILDINGS Procedure The consistency of the stone blocks and the condition of the surface of the bricks on buildings with an exposed brick or stone finish (not rendered) must be checked, and all flaking or delaminated portions must be eliminated. For particularly porous stone with light surface dust, apply a coat of one of the following primers: - Primer 3296 acrylic polymer primer in water dispersion (see section H.3.1)\ - Malech water-based acrylic primer for smoothing out surfaces and promoting adhesion (see section L.5.1.1);...

L.1 PREPARATION OF THE SUBSTRATE L.1.3 NEW BUILDINGS WITH UN-RENDERED MASONRY Procedure On new buildings made from un-rendered brick or block masonry, check the flatness of the walls with a 4 metre straightedge and remove all excess mortar from between the rows of bricks and/or floor slabs, stringcourses, window ledges and all other protruding features. The maximum acceptable out-of-plumb is 5 mm. If the walls are more out-of-plumb than 5 mm, render the wall using a product with excellent adhesion to the substrate, low modulus of elasticity and high tensile strength, such as: - Mape-Antique Intonaco...

BUILDINGS WITH RENDERED MASONRY Procedure Before bonding insulating panels on old buildings made from either rendered masonry or rendered reinforced concrete, check the render to make sure it is well attached to the substrate. Any loose portions must be demolished. Repair the areas where the render has been demolished using latex-modified cementitious mortar with excellent adhesion to the substrate and high tensile strength, such as: Nivoplan levelling mortar for walls + Planicrete synthetic latex rubber to increase the strength and adhesion of cementitious mortar; Planitop Fast 330 rapid-setting,...

BUILDINGS WITH CRACKED MASONRY Procedure On cracked walls, the first step is to ascertain the cause of the cracks to check if they are stable or whether they are due to ongoing movement of the building. In the latter case, before installing a thermal insulation system, work will have to be carried out on the building to impede any further movements and, therefore, stop the cracks propagating into the panels, the skimming layer and the finishing coat of the external thermal insulation system. If the cracks are stable, and any movements are due to the inevitable thermo-hygrometric gradients, the...

BUILDINGS WITH CONCRETE WALLS Procedure Clean new concrete walls with high-pressure water jets, adding special additives if necessary to remove all traces of stripping compound from the surface. Clean the surface of existing structures thoroughly to remove all loose parts, surface laitance and all traces of dust, oil, grease and dirt in general. If the concrete is deteriorated and there are areas with corroded reinforcement rods and delaminated and/or detached concrete, repair these areas as follows: remove the deteriorated concrete; clean the reinforcement rods with a stiff brush, by sand-blasting...

Procedure Thermal insulation systems must be installed specifically according to technical specifications. As a general rule, the following guidelines must always be followed: - substrates must be dry, solid, clean and flat; - make sure there is never any contact between the system and the ground or flooring (see section L.6), - when applying the starter profiles, use a spirit level to make sure they are perfectly horizontal; - the insulating layer must be continuous with no interruptions to prevent the formation of thermal bridges; - where the continuity of the insulating system is interrupted...

L.2 PREPARATION WORK PRIOR TO INSTALLING THERMAL INSULATION SYSTEMS L.2.2 APPLICATION OF STARTER PROFILES Procedure Before installing the insulating panels, to prevent any contact between the thermal insulation system and the ground, starter profiles are fastened in position, using a spirit level (see section L.6) to make sure they are perfectly horizontal, with: - Mapetherm BA aluminium starter profiles with drip channels, fastened in position with expansion plugs, such as: - Mapetherm FIX B nylon stud fasteners with zinc/chrome-plated steel screws.

INSTALLATION OF THERMAL INSULATION SYSTEMS Bond using two-component paste adhesive Procedure Application Whatever type of adhesive is used, make sure the surface of the panels is not too smooth (e.g. XPS panels with a surface “skin”) or dusty (e.g. mineral, mineral wool or cork panels) before bonding them in place, otherwise good adhesion to the substrate will not be guaranteed. If the substrate is flat, bond the panels in place by spreading an even layer of adhesive over the entire back face of the insulating panel. If the substrate is not flat, we recommend applying a layer of render to level...