NIBuilder 35-3 June-July

BUILDING MATERIALS

SMET OFFERS A RANGE OF SUSTAINABLE MORTARS TO FACILITATE ANY RESTORATION OR CONSERVATION PROJECT… Pick the right mortar – every time

and aftercare by Newry-based SMET Building Products Ltd. The range of NHL binders includes: SMET NHL 3.5 The moderate hydraulic strength development of NHL 3.5 makes it suitable for producing lime mortars for masonry work, rendering, plastering base coats and limecrete for ecological new build, restoration and preservation works. Its special composition allows the mortar product to breathe and permits constant hygrometric exchange between the substrate and the environment.

SMET Building Products Ltd supplies a comprehensive range of sustainable, high-quality natural hydraulic lime (NHL) based mortars. The advantages of using NHL- based mortars over cement-based mortars are apparent from decades of experience and research. To begin with, the manufacture of limes or NHLs consumes less energy and produces less greenhouse gases than that of Portland cement per unit weight.* Lime-based mortars also offer a range of advantages from a design perspective. Walls have improved ‘breathability’ to water and water vapour, which reduces the likelihood of frost failure of the unit materials and improves the internal living environment. Walls built with lime-based mortars have more tolerance to movement caused by thermal and moisture action, while movement within masonry walls built with lime-based mortars can be accommodated in the individual bed joints between the masonry units, reducing the need for vertical movement joints. Finally, lime-based mortars are capable of self-healing microscopic cracks by plastic flow and diffusion and are less susceptible to sulphate attack, providing all-round consistently high-quality results. The SMET Professional range of quality NHL is backed up with the expertise of a technical advisor. SMET is site focused, providing customers with industry specialists who will provide training, demonstration and support in the application of professional NHL materials. The range includes pre-mixed renders and plasters for traditional hand or modern machine application and EN 459-1 compliant SMET NHL 2, SMET NHL 3.5 and SMET NHL 5 Natural Hydraulic Lime binders for conservation, repair and sustainable new builds. The CE-marked, pure NHL binders are produced under an ISO 9001:2008 and ISO 14001:2004 quality system to EN 459-1. They can be sourced nationwide from any Haldane Fisher branch, closely supported with detailed technical advice

SMET NHL 5 The eminent hydraulic

strength development of NHL 5 makes it preferable for producing lime mortars for masonry work, rendering, plastering base coats and

Situated on the Cooley Peninsula, a former National School dating from 1882 is lovingly restored using sustainable mortars available from SMET.

limecrete for ecological new build, restoration and preservation works in extreme weather environments and exposed areas. Its special composition allows the mortar product to breathe and permits constant hygrometric exchange between the substrate and the environment. RECENT PROJECT A range of sustainable mortars was again specially selected for the restoration of an old National School originally built in 1882, set in idyllic Omeath, Co Louth. SMET NHL 3.5 was used in the external rendering and basecoats for the internal plastering, which was finished with Bauprocalc KG Hydraulic lime- based skim coat plaster. A new extension was internally plastered with Prooftherm lime base insulating render, and finished with Bauprocalc KG.

The main drivers for selecting lime-based mortars, plasters and renders are the product’s special composition, which allows it to breathe and also permits constant hygrometric exchange between the substrate and the environment. Quadruple-BSI-certified SMET Building Products continue to champion sustainability and ethical responsibility in the construction industry, making it a trusted partner for conscientious builders and developers. Contact SMET to discuss your upcoming project. For all NI restoration case studies, visit: www.smetbuildingproducts.com/projects

*Source: nhbcfoundation.org based on De Vekey, 2005.

T: +44 (0)28 3026 6833 E: info@smetbuildingproducts.com www.smetbuildingproducts.com

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