The 1980 standard offers detailed instructions on selecting, preparing, and installing mosaic parquet flooring made from timber slats. It covers the choice of wood species, quality benchmarks, panel classifications, dimensional criteria, adhesives, and finishing techniques to achieve long-lasting, visually appealing, and functional mosaic parquet floors suitable for various building types.
Overview
The 1980 standard offers detailed instructions on selecting, preparing, and installing mosaic parquet flooring made from timber slats. It covers the choice of wood species, quality benchmarks, panel classifications, dimensional criteria, adhesives, and finishing techniques to achieve long-lasting, visually appealing, and functional mosaic parquet floors suitable for various building types.
Audience
Contents
Structure
This section defines the applicability of the standard, focusing on the dimensions and tolerances of timber slats and panels maintained at 12% moisture content. It references related standards such as IS 707-1976 for timber terminology and other codes governing seasoning, preservation, and termite protection. Detailed dimensional tolerances for panels and their components are provided to ensure quality control.
Here, the standard aligns definitions with IS 707:1976 and elaborates on moisture content requirements, dimensional tolerances, and acceptability criteria for timber panels. Practical guidance for quality assurance during manufacturing and inspection is also included.
Prior to laying mosaic parquet flooring, this section outlines the necessary information such as substrate type, panel design, timber species and grades, flooring thickness, level requirements, damp-proofing, screeded bed conditions, preservative treatments, services routing, underlay options, fixing methods, skirting, and finishing details.
This part emphasizes the hardness and durability requirements of timber species used, specifying a minimum hardness relative to teak. It covers moisture content standards, proper seasoning methods according to IS codes, and preservation treatments to prevent biological deterioration.
The standard classifies parquet panels, particularly focusing on Class II, detailing permissible defects such as seasoning checks, wane, resin pockets, and knot sizes relative to slat width, ensuring adherence to quality limits.
Guidance on seasoning to a specified moisture level, application of chemical preservatives, and anti-termite treatments as per relevant IS codes is provided. It also discusses exceptions when anti-termite construction measures are present and workmanship considerations regarding defects.
This section details the tolerances allowed on thickness, width, length, and diagonal measurements for both panels and individual slats. It also outlines workmanship standards including machine planning, smooth sawn faces, and sharp edges to maintain quality.
The construction section reiterates the importance of maintaining 12% moisture content, precise dimensional tolerances, workmanship quality, and guidelines on anti-termite chemical treatments to ensure durable and accurate parquet flooring assembly.
This appendix lists timber species suitable for mosaic parquet slats ranked by hardness relative to teak. It highlights species such as Satinwood, Gurjan, Rohini, Padauk, and others, with teak serving as the baseline for hardness. Selection criteria and quality considerations for slat timber are also discussed.
Frequently Asked
Per the 1980 standard, Appendix A, timber species recommended for mosaic parquet slats include Satinwood (hardness 130% relative to teak), Gurjan, Rohini, Padauk, Kassi (85%), Hollock (75%), Anjan (70%), Fir (65%), Machilus (55%), and Teak as the reference species (100%). These species are selected based on hardness and durability requirements essential for flooring.
Timber slats are categorized into classes with specific defect allowances. For Class I, slats should be quarter, half-quarter, or rectangular sawn with up to 30% tangential sawn per panel, free from knots on the face, and minor knots on the back. Class II allows only one defect per slat face, such as sound knots up to half the slat width, loose knots up to one-fifth the width, seasoning checks not longer than 30 mm, and resin pockets not exceeding one twenty-fifth of the slat width.
The code specifies solvent-based adhesives, dispersion adhesives, epoxy resin adhesives, and phenolic resin adhesives (notably resorcinol formaldehyde) for bonding mosaic parquet panels. Adhesives should be applied on both the dry, prepared substrate and the back of the parquet panels where necessary, ensuring thin, fine joints and firm pressing or sliding for optimal adhesion.
Before installation, it is crucial to verify that the subfloor is dry and properly damp-proofed. When laying over battened floors, moisture protection includes inserting a plywood or block board layer between battens and parquet, using damp-proof membranes or screeded beds beneath, and ensuring adequate ventilation underneath. Preservative treatments on timber also help resist moisture-related damage. Panels should be laid diagonally to minimize visible gaps caused by timber movement.
Dimensional tolerances for individual slats are ±0.2 mm in thickness, width, and length. For component squares in panels, width tolerance is fixed at 0.2 mm, with ±0.2 mm allowed in thickness and length. Entire panel width and length may vary by ±0.5 mm, and diagonal length by ±0.8 mm. Panels are considered acceptable if no more than 5% of slats exceed twice these deviations. Workmanship requires machine-planned edges, finely sawn faces and ends, and square, sharp edges to maintain quality and durability.
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