CONSOLIDATION OF THE SURFACE OF THE MASONRY
The surface of the masonry was consolidated in several steps. The first step was to pre-consolidate the surfaces with PRIMER 3296, an acrylic primer in water dispersion.
The larger cracks in the surface were then stitched with CARBOTUBE C 170/10 (pultruded carbon fibre tubes impregnated with epoxy resin) in combination with INJECTORS Ø23+MAPE-ANTIQUE F21.
CONSOLIDATION OF THE VAULTED CEILINGS
The vaulted ceilings were consolidated by capping them with MAPE-ANTIQUE STRUTTURALE NHL, a pre-blended, cement-free mortar for transpirant render and masonry work, based on natural hydraulic lime, Eco-Pozzolan, recycled materials, natural sands, micro-fibres, glass fibres and special admixtures. The use of this product, in combination with MAPENET EM 40 pre-impregnated, alkali-resistant glass fibre mesh (FRP) and MAPENET EM CONNECTOR 7 mm diameter and 200 mm long fibreglass connectors, formed a reinforced layer suitable to consolidate the extrados of sandstone vaulted ceilings.
The joints were reinforced with 6 mm diameter MAPEI STEEL BAR 316, ultra high-strength, AISI 304 and AISI 316 stainless steel helical bars, used in combination with MAPE-ANTIQUE ALLETTAMENTO.
CONSOLIDATION AND RESTORATION OF THE WOODEN TRUSSES
The wooden trusses were consolidated and restored using products from the MAPEWOOD SYSTEM. This line of products is made from special epoxy adhesives chemically and physically compatible with wood.
The surface of the wood was initially treated with MAPEWOOD PRIMER 100 – a fluid epoxy primer in water dispersion – and then with MAPEWOOD PASTE 140, a thixotropic epoxy adhesive for repairing wooden beams, trusses and columns.
THE DEHUMIDIFYING SYSTEM
The macro-porous dehumidifying system for the interior masonry of the church consisted of a scratch-coat layer of MAPE-ANTIQUE RINZAFFO cement-free, salt-resistant, transpirant mortar made from lime, Eco-Pozzolan and recycled materials.
This product was followed by a layer of MAPE-ANTIQUE MC, a special salt-resistant, macro-porous, dehumidifying rendering mortar made from lime and Eco-Pozzolan.
Once this layer had cured, the walls were skimmed with MAPE-ANTIQUE FC GROSSO, a salt-resistant, large-grained, transpirant skimming mortar made from lime and Eco-Pozzolan for a rough finish on renders.
STRENGTHENING THE MASONRY
The masonry was strengthened by applying reinforced render made from MAPEWALL RENDER & STRENGTHEN, a high strength, fibre-reinforced, natural hydraulic lime-based transpirant rendering and masonry mortar with very low emission level of VOC (Volatile Organic Compounds) for making structural render, even “reinforced” (CRM). The product was used in combination with MAPEGRID B250 primed alkali-resistant basalt fibre mesh which was fixed in place with L-shaped MAPENET EM CONNECTOR L20 glass fibre fasteners anchored with MAPEFIX PE WALL styrene-free chemical anchor.
PROTECTING THE STONE SURFACES
The stone surfaces of the church were treated to protect them from the action of heavy, driving rain with ANTIPLUVIOL W, a colourless, silane and siloxane-based water-repellent impregnator in watery emulsion which also improves the self-cleaning effect of the façade and reduces the capacity of moss and mildew from adhering to the material.