Materials and products
What it is, how it is used, defects, install.
Materials articles follow a consistent structure: what the product is, where it is used in a residential build, what standard governs its installation, what the common defects look like, and how to identify non-conforming product. Coverage spans structural products (engineered timber, LVL, steel sections, concrete), claddings (fibre cement, ACP, timber weatherboard, masonry veneer), membranes, adhesives, sealants, hardware, and finishes.
It is for builders, estimators, and building designers who need to understand a product at specification and at installation, not just at purchase. Articles reference the relevant AS standards for installation tolerances and performance (for example, AS 3958.1 for ceramic tiling, AS 2589 for gypsum linings, AS 1562 for sheet roof cladding) and flag where product substitution during a build has compliance implications.
Chalkline's position on materials is simple: the standard is the specification, and non-conforming product is the builder's problem, not the supplier's. These articles give you enough to ask the right questions at the time of purchase, before the product is on site and the question costs you money.
Material
- material 28 May 2026Accoya: the acetylated radiata pine for joinery and cladding Accoya is acetylated radiata pine chemically modified for stability and Class 1 durability, with a 50-year above-ground warranty. Where it fits in the build.
- material 16 May 2026Acoustic batt (sound insulation) Acoustic batt is higher-density glasswool or polyester insulation (24+ kg/m³) for inter-tenancy separating walls. Rated Rw alongside thermal R. NCC Class 1b / Class 2.
- material 10 May 2026Acoustic boards: soundproofing linings for residential builders Acoustic plasterboard for party walls, theatre rooms and garage separation. NCC Part 10.7 Rw+Ctr 50 requirements, SoundChek vs Soundshield, MLV, install tips.
- material 11 May 2026Anchors and chemical anchors for residential construction Sleeve, wedge, and chemical anchors for Australian residential construction. AS 5216:2021, ETA approvals, hole prep, torque specs, common applications.
- material 13 May 2026Architrave profiles: pencil round, half-splay, lambs tongue, colonial and shadowline Pencil round, half-splay, lambs tongue, colonial and shadowline architrave profiles for Australian builders. MDF vs FJ pine, sizing, suppliers.
- material 25 May 2026Bifenthrin: the repellent termiticide (Biflex, HomeGuard) Bifenthrin is a repellent synthetic-pyrethroid termiticide (Biflex, HomeGuard) used in AS 3660 termite barriers. It has a 10-year label and differs from fipronil.
- material 29 May 2026Biflex: FMC's bifenthrin termiticide Biflex is FMC's brand name for a bifenthrin-based chemical soil termiticide widely used in AU. See bifenthrin for the active and how it works.
- material 25 May 2026Blackbutt cladding: the bushfire-rated Australian hardwood Blackbutt is an Australian hardwood and one of seven AS 3959 bushfire-resisting timbers, usable untreated up to BAL-29. Its density, durability, and uses.
- material 8 May 2026Bolts (M-series metric) for residential construction M8 to M20 bolt sizes, property classes 4.6/8.8/10.9, hot-dip galvanised, anchor bolts, hold-down, post bases. AS 4291.1:2015, AS/NZS 1252.1:2016.
- material 10 May 2026Bolts for residential construction Overview of structural bolts for Australian residential construction. Full coverage: M-series metric bolts, anchor bolts, hold-downs, coatings.
- material 8 May 2026Bricks: clay and concrete Clay vs concrete bricks: exposure grades, mortar mixes, bond patterns, cavity and veneer construction per AS 3700:2018 and NCC 2022 Housing Provisions.
- material 15 May 2026Bullet head nail: finish carpentry nail with rounded head Bullet head nails have a small rounded head that punches below the surface for filling. Standard for architraves, skirtings, finish carpentry. AS 2334.
- material 7 May 2026Cement sheet (fibre cement) Fibre cement sheet grades (Villaboard, HardieFlex, compressed), fixing specs per NCC and manufacturer, wet area rules, silica controls, defects at PCI.
- material 10 May 2026Coach screws for residential construction M6-M16 hex-head coach screws: sizes, pilot holes, HDG vs zinc-plated, treated pine rules. AS/NZS 1393:1996. Decks, pergolas, structural timber.
- material 16 May 2026Colorbond Ultra (severe-exposure variant) Colorbond Ultra is BlueScope's marine/severe-exposure roofing with upgraded paint and primer. Required within 1 km of breaking surf; 15-25% premium over standard.
- material 24 May 2026Compressed fibre-cement sheet: the structural floor substrate Compressed fibre-cement sheet is high-density structural flooring laid over joists, and the only fibre-cement permitted as a wet-area floor substrate under the NCC.
- material 13 May 2026Concrete grades for residential builds: N20, N25, N32, N40 and beyond Concrete grades for Australian residential builds: N20 vs N25 vs N32, when to specify, AS 1379 supply, slump and aggregate, the docket, pricing and defects.
- material 9 May 2026Construction adhesives: types, uses, and what goes wrong Practical guide to construction adhesives for Australian residential builders: PVA, polyurethane, MS polymer, epoxy, SBR. Uses, open times, defects, H&S.
- material 10 May 2026Cornice Cove vs square-set vs decorative cornice: sizes, fixing methods, cornice cement vs adhesive, common defects, and tolerances for Australian residential builders.
- material 29 May 2026Dark red meranti (Shorea spp.) Dark red meranti (Shorea spp.) is the volume hardwood for Australian timber window joinery. AS 5604 DC3 above-ground; stable, paint-grade, kiln-dried.
- material 10 May 2026Decking screws for Australian residential construction 304 vs 316 stainless, Class 4 HDG for treated pine, Type 17 tip, Torx vs square drive, face-fix vs hidden-fix: Australian decking screw guide.
- material 13 May 2026Decking timbers in Australian construction: species, sizes, fixings, BAL ratings Decking timber selection for Australian builders: spotted gum, blackbutt, jarrah, merbau, ironbark, AS 5604 durability, AS 3959 BAL ratings, sizes and fixing.
- material 26 May 2026Deltamethrin: the termiticide in Kordon treated sheets Deltamethrin is a synthetic-pyrethroid termiticide, the active in Kordon treated-sheet barriers (Envu). How it works, its AS 3660.3 use, and how it differs from fipronil.
- material 13 May 2026Door hinges in Australian construction: sizes, materials, fire-rated Door hinges in Australian construction: butt hinge types, sizes, ball-bearing, materials, fire-rated, brands, common install defects.
- material 13 May 2026Door locks and handles in Australian construction: types, AS 4145 ratings, brands Door locks and handles in Australian construction: AS 4145 security ratings, lever handle DDA, Lockwood Whitco Yale, fire-rated, defects.
- material 13 May 2026Double glazing for residential builds: IGU construction, U-values, and selection Double glazing for Australian residential: IGU construction, AS/NZS 4666, Low-E argon U-value, warm-edge spacer, NCC NatHERS performance, defects.
- material 29 May 2026Dynabolt: Ramset's sleeve anchor Dynabolt is Ramset's brand of sleeve anchor for medium-duty fixings into concrete. See sleeve anchor for the install rules and AS 5216 detail.
- material 14 May 2026Engineered timber products: LVL, Glulam, CLT, and I-joists Engineered timber for Australian builders: LVL, Glulam, CLT, I-joists. AS 1684 limits, manufacturer span tables, where each product fits, common defect modes.
- material 16 May 2026EPDM membrane: synthetic rubber single-ply roofing EPDM single-ply rubber roofing for AU flat roofs: 25-35 year life, bonded seams, extreme flexibility, where it beats TPO and modified bitumen, brands, install.
- material 26 May 2026Fipronil: the non-repellent termiticide (Termidor) Fipronil is a non-repellent termiticide (Termidor) used in AS 3660 barriers. How the transfer effect works, its ~8-year label, and how it differs from bifenthrin.
- material 13 May 2026Float (annealed) glass: standard residential glazing where AS 1288 allows Annealed float glass for Australian residential builds: applications outside AS 1288 safety zones, thicknesses, Low-E variants, manufacturers.
- material 16 May 2026Foil sarking: reflective membrane selection guide Foil sarking selection guide for Australian roofs and walls: when reflective foil delivers R-value, when it traps moisture, brand specs, AS 4200.2 rule.
- material 28 May 2026Foil-backed plasterboard: the vapour-control wall lining Foil-backed plasterboard is plasterboard with a foil layer on the back, acting as a vapour control layer on the warm side of the wall. When to use it under NCC H4.
- material 25 May 2026Framing anchors and tie-down connectors Framing anchors are galvanised steel connectors (triple grips, joist hangers, straps, hold-downs) that build the AS 1684 tie-down chain from roof to slab.
- material 13 May 2026Glasswool batts in Australian construction: R-values, sizing, and install Glasswool insulation batts in Australian construction: R-value range, AS/NZS 4859, Bradford Knauf Pink Batts, install spec and defects.
- material 13 May 2026Glulam beams in Australian construction: GL grades, curved sections, and exposed feature beams Glulam (glued-laminated timber) beams for Australian builders: GL8 GL10 GL12 GL17 stress grades, AS/NZS 1328, Hyne Wesbeam Dindas, exposed feature beam guide.
- material 25 May 2026Granitgard: the graded-stone termite barrier Granitgard is a non-toxic graded-stone (1.5 to 5mm) termite barrier, CodeMark-certified with a 50-year warranty. How it works and when it must be reinstated.
- material 28 May 2026Gyprock: CSR's branded plasterboard family Gyprock is CSR's plasterboard brand: Standard, Aquachek, Soundchek, Fyrchek, Impactchek, Shaftliner. What each variant does and where the Red Book fits.
- material 29 May 2026Hyspan: CHH's LVL beam brand Hyspan is Carter Holt Harvey's LVL brand, the volume residential LVL beam in Australia. See LVL beams for the engineered product and how it spans.
- material 28 May 2026Impact-resistant plasterboard: the high-traffic wall lining Impact-resistant plasterboard (Gyprock Impactchek) is a 13 mm reinforced board for corridors, stairwells, and high-traffic walls. Twice the impact resistance of standard.
- material 13 May 2026Internal wet-area waterproofing membranes: AS 3740 / AS 4858 compliant products Internal wet area waterproofing membranes for Australian builders: AS 3740 AS/NZS 4858, Mapei Ardex Bostik Davco brands, types, defects.
- material 5 May 2026Joint compound Setting vs drying joint compound for plasterboard: three-coat system per AS/NZS 2589, working times, tape choice, sanding, defects, supplier list.
- material 28 May 2026Knauf: the rebranded USG Boral plasterboard line Knauf is the rebranded USG Boral plasterboard line: Wetstop, Sheetrock, Fireshield, Soundshield, AQUAPANEL. Specification, system warranty, and where it fits.
- material 25 May 2026Kordon: the deltamethrin treated-sheet termite barrier Kordon is a deltamethrin-impregnated treated-sheet termite barrier (Envu), CodeMark-certified under AS 3660 for 50+ years and Mastotermes resistance. How it works.
- material 13 May 2026Laminated glass for residential builds: PVB and SGP interlayers, AS 1288 selection Laminated safety glass for Australian residential builds: PVB SGP interlayer, AS 1288 balustrade skylight, UV blocking, acoustic, BAL, defects.
- material 13 May 2026LVL beams in Australian construction: stress grades, sizing, and manufacturer span tables LVL beams in Australian construction: F17 F22 F27 stress grades, AS/NZS 4357 manufacturing, Wesbeam Tilling Carter Holt Harvey, span table selection.
- material 13 May 2026Metal roofing in Australian construction: profiles, coatings, and Colorbond selection Metal roofing in Australian construction: Custom Orb, Trimdek, Klip-Lok, Spandek profiles, Colorbond vs Zincalume, AS 1562.1, BAL ratings, fixing.
- material 16 May 2026Modified bitumen roofing: torch-on built-up membrane systems Modified bitumen roofing for AU flat roofs: APP and SBS chemistry, two-ply and three-ply systems, torch-on install, fire-watch SWMS, vs single-ply.
- material 13 May 2026Mortar mixes for residential masonry: M2, M3, M4 and the NCC ratios Mortar mix ratios for Australian residential masonry: AS 3700 M2 M3 M4 grades, NCC 2022 Table 5.6.3 proportions, exposure class selection, common defects.
- material 15 May 2026MS polymer adhesive: builder guide to modified silicone construction adhesive MS polymer (modified silicone) adhesive cures on contact with moisture. Bonds wet, paints, no shrinkage. Sub-floor, panel bonding, high-flex joints. Builder primer.
- material 13 May 2026MS polymer sealants: paintable, isocyanate-free, what they replace MS polymer (modified silane) sealants for Australian builders: paintable, isocyanate-free, broad substrate range. Sikaflex MS, Soudaseal, X'traseal, Bostik SMP.
- material 8 May 2026Nails for residential construction: types, gauges, and when to use them Bullet head vs flat head, hand nails vs gun nails, ring shank, HDG and stainless: full guide to nail types and gauges for Australian residential framing and finishing.
- material 29 May 2026Particleboard flooring: the residential floor-sheeting standard Particleboard is the standard floor sheeting over joists in AU residential construction. AS 1860 install rules, H2 termite-treated grades, wet-area limits.
- material 8 May 2026Pine framing grades: MGP10, MGP12, MGP15, F-grades, and treatment levels MGP10, MGP12, MGP15, F5, F7 framing grades and H1–H4 treatment levels for Australian residential pine framing. AS 1684 span table inputs, common sizes, defects.
- material 2 May 2026Plasterboard Plasterboard grades, sheet sizes, screw types and spacing per AS/NZS 2589, install sequence, common defects, supplier list. Plain English with NCC and AS citations.
- material 10 May 2026Plasterboard screws: bugle head, thread types, lengths, and install Fine vs coarse thread, 25mm to 50mm lengths, depth-of-set rule, screw spacing per AS/NZS 2589, auto-feed gun tips and common defects explained.
- material 13 May 2026Polyester batts in Australian construction: allergen-free insulation alternative Polyester insulation batts for Australian builders: recycled PET, no fibre irritation, AS/NZS 4859, Bradford Autex Pink Batts, R-values, defects.
- material 11 May 2026Polyurethane sealants: movement joints, perimeter sealing, and what goes wrong Guide to polyurethane sealants for Australian builders: Sikaflex PRO, Sikaflex 11FC, Bostik Seal N Flex. Movement joints, render-to-aluminium, paintability.
- material 29 May 2026Pryda Speedbrace: the volume residential bracing system Pryda Speedbrace is the volume pressed-steel diagonal wall bracing on AU timber frames. See wall bracing for the install and AS 1684 detail.
- material 13 May 2026Reflective foil insulation: sarking, vapour barriers, and where it actually delivers R-value Reflective foil insulation for Australian builders: aluminium foil sarking, air-gap R-value, AS/NZS 4859 + AS/NZS 4200, Anticon Sisalation Kingspan.
- material 8 May 2026Reo (steel reinforcement) for residential concrete Mesh grades SL72 to SL102, bar sizes N12 to N20, cover requirements 30/40 mm per NCC 2022, lap lengths, bar chair spacing, pre-pour checklist. AS/NZS 4671:2019.
- material 13 May 2026Rigid foam insulation boards: EPS, XPS, PIR, phenolic for Australian builds Rigid foam insulation boards for Australian residential builds: EPS XPS PIR phenolic chemistry, R-values, applications, brands, fire performance.
- material 13 May 2026Rockwool (stone wool) insulation: fire-rated walls and acoustic applications Rockwool stone wool insulation for Australian builders: fire-rated walls, inter-tenancy acoustic, AS/NZS 4859, brands, cost vs glasswool.
- material 13 May 2026Roof tiles in Australian construction: concrete, terracotta, slate, and profile selection Roof tiles in Australian construction: concrete vs terracotta, profile types, pitch minimums, AS 2050, Boral Monier Bristile, fixing systems.
- material 13 May 2026Roofing membranes in Australian construction: sheet, liquid-applied, and where each lands Roofing membranes for Australian builders: TPO EPDM PVC modified bitumen sheet, PMMA polyurethane liquid-applied, AS 4654, brands, applications.
- material 13 May 2026Sarking: pliable building membrane for roofs, walls, and underfloor Sarking as a building membrane for Australian residential builds: AS/NZS 4200 water vapour wind barrier, BAL rated, install reqs, brands.
- material 10 May 2026Screws and fasteners for residential construction: a practical overview Head types, drive types, AS 3566 Class 3/4 corrosion ratings, wood vs metal vs masonry. Practical screw selection for Australian residential builders.
- material 16 May 2026Scyon Linea weatherboard: builder's product guide Scyon Linea weatherboard specs, install rules, and site checks: 16 mm fibre cement, 150 or 180 mm face widths, BAL-29, RCS wet-cut compliance, end-coat seal.
- material 25 May 2026Scyon Stria: the horizontal-groove fibre cement cladding Scyon Stria is a James Hardie fibre cement cladding board with a 15mm horizontal shiplap groove. Sizes, cavity-fix install, cut-end sealing, and how it compares.
- material 15 May 2026Scyon: James Hardie's engineered fibre cement range Scyon is James Hardie's premium engineered fibre cement: Linea weatherboard, Stria cladding, Secura flooring. Different rules from standard 6mm fibre cement.
- material 24 May 2026Shower base: preformed tray vs tiled set-down The two ways to build a shower floor in Australia: a preformed acrylic or stone-resin tray, or a tiled set-down over a membrane. Materials, cost, and trade-offs.
- material 11 May 2026Silicone sealants: neutral cure vs acetoxy, wet area vs glazing grade Neutral cure vs acetoxy silicone sealants for Australian builders: wet area, glazing, AS 4020, mould resistance, paintability limits. Selleys, Sika, Davco.
- material 11 May 2026Skirting board profiles: pencil round, half-splay, lambs tongue, colonial and more Pencil round, half-splay, lambs tongue, colonial and heritage skirting profiles: heights by ceiling, MDF vs FJ pine, supplier ranges, tolerances.
- material 13 May 2026Steel beams in Australian construction: sections, grades, coatings, and selection Steel beams in Australian construction: UB UC PFC SHS RHS sections, Grade 300 standard, AS 4100 design, lintel and column selection, coatings.
- material 13 May 2026Steel framing in Australian construction: cold-formed sections, gauges, and selection vs timber Steel framing in Australian construction: cold-formed C-section, BMT gauges, AS/NZS 4600, BlueScope TrueCore, fixings, vs timber framing.
- material 13 May 2026Structural hardwood in Australian construction: species, F-grades, and durability classes Structural hardwood in Australian construction: spotted gum, ironbark, blackbutt species, F17-F34 stress grades, AS 2082 grading, AS 5604 durability.
- material 10 May 2026Structural screws for timber construction: Australia ASSY VG, SPAX, Simpson SDWS: structural screws for timber-to-timber. No pre-drilling, high withdrawal and shear loads, AS 1720.1 design context.
- material 29 May 2026Termidor: BASF's fipronil termiticide Termidor is BASF's brand name for a fipronil-based non-repellent termiticide. See fipronil for the active and how the transfer effect works.
- material 25 May 2026TermiMesh: the stainless-steel mesh termite barrier TermiMesh is a TMA725 stainless-steel mesh termite barrier with apertures too small for termites. Chemical-free, CodeMark-certified, accredited-installer only.
- material 10 May 2026Tile backer boards: cement-bonded, glass-mat gypsum, and foam-core options for Australian wet areas Compare tile backer boards for Australian wet areas: cement-bonded, glass-mat gypsum, foam-core. AS 3740, NCC 2022 substrate rules, fixing, joint treatment.
- material 24 May 2026Tile underlay: the sheet that stabilises a floor before tiling Tile underlay is a thin fibre-cement sheet fixed over a subfloor to give a rigid, stable base for ceramic tiles and stop cracking. How it differs from compressed sheet.
- material 13 May 2026Toughened (tempered) glass for residential builds: AS 1288, AS/NZS 2208, applications Toughened (tempered) safety glass for Australian residential builds: AS 1288 AS/NZS 2208, shower screens, balustrades, thicknesses, defects.
- material 16 May 2026TPO membrane: single-ply roofing for residential flat roofs TPO single-ply roofing for Australian flat roofs: 1.2-1.5 mm thick, hot-air welded seams, white reflective surface, 20-30 year life, install methods and pitfalls.
- material 13 May 2026Treated pine: hazard classes H1 to H6, chemicals, and where each lands Treated pine hazard classes for Australian residential builders: H1 H2 H3 H4 H5 H6 application mapping, CCA ACQ LOSP MCA chemicals, AS 1604.1 standard.
- material 29 May 2026Trubolt: Ramset's wedge anchor Trubolt is Ramset's brand of torque-controlled wedge anchor for structural fixings into concrete. See wedge anchor for the install rules and AS 5216 detail.
- material 13 May 2026Vapour barriers for residential builds: under-slab and envelope membranes Vapour barriers for Australian residential builds: under-slab polyethylene 0.2 mm minimum AS 2870, envelope cool-climate, products, install.
- material 11 May 2026Wall ties: cavity masonry and masonry veneer Wall tie selection for cavity masonry and veneer: duty grades, spacing per NCC 2022, corrosion classes R1-R4, coastal requirements, and retrofit options.
- material 24 May 2026Water-resistant plasterboard: the wall-only wet-area board Water-resistant plasterboard (Aquachek, Wetstop) is permitted as a wet-area wall substrate under the NCC, but not on floors, and it still needs a membrane.
- material 29 May 2026Western red cedar (Thuja plicata): the premium joinery timber Western red cedar (Thuja plicata) is the premium AU joinery timber: low density, naturally durable DC2 above-ground, dimensionally stable, paint-grade or clear-finish.
- material 25 May 2026Western red cedar cladding: the premium timber weatherboard Western red cedar (Thuja plicata) is a naturally durable, low-density premium cladding timber. Why it needs stainless or silicon-bronze fixings, and how it compares.
- material 13 May 2026Window hardware in Australian construction: latches, stays, restrictors, locks Window hardware in Australian construction: AS 5203 child restrictors, latches, stays, casement and sash, Whitco Doric brands, defects.