Ventilated cladding systems: structural and drainability performance criteria

Abstract

Abstractladding systems have significant effect on the performance and durability of building façades, contributing to the building watertightness, property valuation, aesthetic finishing, and decoration. Non-adherent cladding, also named rainscreen cladding or ventilated cladding, is currently used in residential and commercial buildings, new constructions, or retrofit operations, and it is considered an efficient measure to improve the moisture safety of building envelopes. Therefore, the absence of Brazilian normalization to ventilated cladding systems is one of the difficulties limiting its increased local application. In Brazil, a technical standard, NBR 15575, parts 1-6, (2013), establish the general performance requirements and test methods to evaluate residential building systems including structure, wall, floor, coverage, and hydraulic installation. However, this standard cannot be integrally applied to the cladding systems because it was developed considering the vertical wall system as a whole. In this study, we propose the criteria and test methods for assessing ventilated cladding systems while taking into account the structural safety (wind loads resistance, hard and soft impact resistance) and drainability requirements. The following activities are performed: literature review, practical case study, and tests on prototypes for validation of the proposal. The tests allow verification of the feasibility of the criteria and tests methods proposed. In addition, the proposal makes it possible to guide design, construction, and maintenance needs, thereby inducing the growth of this technology in Brazil. Keywords

Energy and economic performance analysis of different ventilated wall construction types in residential buildings

“…Few studies related to the performance of ventilated façade have shown a reduction of 20-40% of cooling energy demand. However, this reduction is correlated to parameters as thermal performance of the layers, insulation status of the inner façade, the height and the width of the air cavity, the type of ventilation, the climatic context, solar exposure, and wind status [21][22][23][24].…”

Implementação da norma de desempenho NBR 15575:2013: estudo de caso em Recife/PE

“…Por meio destes instrumentos foi possível entender detalhadamente as ações desenvolvidas e as dificuldades vivenciadas para implementar a NBR 15575:2013. GARLET et al, 2017;SILVA, 2017;MUNIZ-GÄAL et al, 2018;SILVA et al, 2018;TUBELO et al, 2018;DALBEM et al, 2019Desempenho Acústico RIBEIRO et al, 2014SCHVARSTZHAUPT;NUNES, 2014;ZANNIN, 2016;GARLET et al, 2017;PACHECO et al, 2017;SANTANA et al, 2017;KLIPPEL FILHO et al, 2018;SILVA et al, 2018Resistência ao fogo BOLINA et al, 2015BOLINA et al, 2017;HENNEMANN et al, 2017;KLIPPEL FILHO et al, 2018 Entre os documentos analisados destacaram-se padrões e registros dos sistemas de gestão da qualidade, checklists de projetos de arquitetura e engenharia e resultados de ensaios e simulações realizadas pelas empresas. Os dados obtidos foram compilados, triangulados e analisados criticamente de forma a caracterizar e permitir a avaliação da implementação da norma de desempenho.…”

Thermal evaluation of the use of porous ceramic plates on ventilated façades – Part I: Effect of composition and firing temperature on porosity and bending strength

“…The façade is one of the basic elements used to enhance a building, although its functions are broader than just the aesthetics of the building. Cladding systems have a significant effect on the performance and durability of façades, contributing to watertightness, real estate value, and aesthetic finishing 1 …”

“…Ventilated façade systems are considered as a sustainable solution for building façades due to its aesthetic and energy efficient characteristics 2 1,3,4 . Currently, different coating materials can be used, including fiber cement panels, composite aluminum, natural stone slabs such as marble and granite, metal slabs, and porcelain tiles 1 …”

“…Cladding systems have a significant effect on the performance and durability of façades, contributing to watertightness, real estate value, and aesthetic finishing. 1 Ventilated façade systems are considered as a sustainable solution for building façades due to its aesthetic and energy efficient characteristics. 2 This system is characterized by the existence of ventilation in an air chamber with advantages that include thermal and acoustic modulation, rapid execution, and reduced construction time.…”