Expert insights on lumber, craft, and building with nature — from America's oldest lumber company since 1798
A technical guide to specifying Jatoba siding for exterior cladding, including hardness, UV color change, weathering behavior, finishing, and installation details.
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Public boardwalks and municipal piers specify Ipe and other tropical hardwoods for their decades of low-maintenance service under heavy foot traffic. What changes for commercial and public decking: ADA gaps, slip resistance, volume grading, and documentation.
A pool deck is a barefoot, wet, high-sun surface, which changes the tropical hardwood calculus: lighter species run cooler underfoot, slip resistance matters, and the deck must handle constant spl-out. How to choose and source tropical hardwood pool decking.
Independent testing data on Accoya acetylated wood siding — dimensional stability, decay resistance, and 50-year warranty performance across freeze-thaw, coastal, and high-UV environments.
Homeowners replacing a failing composite or pressure-treated deck often switch to tropical hardwood for a surface that lasts decades and looks like real wood. What to know about reusing framing, board thickness, and sourcing the replacement.
Ordering tropical hardwood decking is not like grabbing boards off a rack. It runs from a cut list and quote through grading, milling, and staged nationwide delivery. A step-by-step of how an Ipe decking order actually works.
Sourcing the decking, the pre-grooved profile, the hidden-fastener clips, and the stainless screws from one supplier keeps the groove, the clip, and the fastener matched, and avoids the mismatch that stalls a hidden-fastener install. How a complete decking-plus-fastener package works.
Factory-finished tropical hardwood decking arrives milled, oil-finished on all faces, and ready to install, removing jobsite finishing and its weather delays. What factory finishing covers, why penetrating oil is used, and how to source it.
In-house milling lets a decking order be cut to custom widths, thicknesses, and profiles, pre-grooved for hidden fasteners, and finished before it ships. What custom milling and prefinishing make possible, and how to source them.
A wholesale tropical decking distributor is judged on inventory depth, consistent grading across large volumes, FSC-certified stock with documentation, long-length availability, and the logistics to ship nationwide and stage delivery. A detailed look at what separates a real wholesale source from a reseller.
A detailed comparison of warranty coverage across wood siding species, brands, and finish systems—examining what's actually covered, what voids protection, and how to maximize long-term value from Accoya and thermally modified products to tropical hardwoods and domestic softwoods.
A technical comparison of wood siding species that deliver 30+ years of structural performance without refinishing — Ipe, Accoya, Thermory, Abodo Vulcan, and cypress heartwood — including lifecycle cost analysis, weathering timelines, and installation requirements for architects specifying unfinished exterior wood.
A specification guide for wood siding in mixed-climate zones, covering freeze-thaw risk, humidity cycling, rainscreen assemblies, species selection, finish strategy, and procurement details.
A detailed performance comparison of teak, genuine mahogany, and sapele for exterior siding applications, covering durability ratings, dimensional stability, UV resistance, cost per installed square foot, and specification guidance for architects and builders.
Tropical hardwood deck tiles lay over a rooftop membrane or balcony slab on pedestals or a grid, giving a real-wood surface that floats above the waterproofing and lifts off for drainage and access. A detailed look at how they work, weight and wind limits, drainage, and sourcing.
A commercial decking specification succeeds on the same package every time: species and grade in real terms, performance criteria, profile and fastener method, the substructure and drainage, and the documentation and mockup that clear the submittal. A section-by-section guide for architects.
Turning a deck's square footage into a board order means accounting for the actual board width, the gap, a waste factor, and the board-foot unit lumber is estimated in. A step-by-step method with a worked example for tropical hardwood decking.
Factory prefinished wood cladding eliminates the number one failure mode in exterior siding: field-applied finishes degrading due to uncontrolled weather exposure during application. J. Gibson McIlvain's Alpha wood cladding program delivers boards sealed on all six sides in a controlled environment, ready for immediate installation as part of a complete rainscreen system.
For commercial and multifamily facades, wood cladding is selected by matching durability class, fire performance, and dimensional stability to the building's code envelope and exposure, not by naming one best species. A comparison of modified woods, tropical hardwoods, and domestic species for large-scale projects.
The modern farmhouse look is driven by vertical board-and-batten siding, with shiplap and nickel-gap as the supporting profiles for accents and porch ceilings. The profile sets the aesthetic, but vertical siding needs counter-batten drainage and a ventilated cavity to perform.
Contemporary wood facades are defined by a uniform reveal and concealed fasteners, which points to tongue-and-groove and clip-mounted profiles over face-fastened shiplap. The clean look depends on a stable species, a tight milling tolerance, and a rainscreen cavity working together.
Wood siding over exterior rigid foam is attached with furring strips screwed through the foam into the structural framing, sized and spaced to carry the cladding weight and resist pullout. The foam is not a fastening base, and the furring also forms the ventilated rainscreen.
Continuous exterior insulation breaks the thermal bridge through the studs, but wood cladding over it must be furred, and the substrate choice decides how hard the attachment is. A structural insulated board gives a fastening base and drainage plane that plain foam does not. The wall dries through the rainscreen, not the cladding.
WUI approval for wood siding comes down to proving the cladding meets one of three compliance paths, noncombustible, ignition-resistant, or tested per SFM 12-7A-1, and submitting fire-test documentation for the specific product. Dense hardwoods reach Class A without treatment; the assembly is evaluated as a whole.
A commercial wood cladding submittal should contain species and grade samples, the actual milled profile, the finish on the real species, fasteners and clips, ASTM E84 fire documentation, and chain-of-custody paperwork. The milled profile and product-specific fire report are the items most often missing.
Wood siding cups mainly because of how it is installed and ventilated, not how it was coated. The largest levers are a ventilated rainscreen, the right moisture content at install, grain orientation, and board width. Back priming is a minor supporting measure.
Specifying siding with no field finishing removes the finishing trade and its weather dependency from the jobsite, in exchange for planning up front: lead time, length limits on modified woods, a cut plan, and end-grain touch-up. The facade installs in one pass and is complete.
A multifamily wood cladding specification succeeds on three coordinated things: the wall assembly, the material definition in real grading terms, and the submittal and mockup process. Naming a species is the easy part; defining grade, moisture content, profile, fastener method, and single-source supply is what makes the wall perform.
Prefinished hardwood siding ships milled, oil-finished, and sealed on all six faces, ready to install with no field finishing. Ipe, Cumaru, Sapele, Teak, and Jatoba are finished with penetrating oil because dense hardwoods reject film finishes. The only field step is sealing the cut ends.
Back priming applies a thin uniform coat to the back of a board so it exchanges moisture at a similar rate front and back, which helps it stay flat. But a thin coat is sufficient, a heavy coat adds nothing, and back priming is not a substitute for the ventilated rainscreen that is the real defense against moisture from behind.
Buying wood cladding for a commercial building runs through five steps: define the assembly and species, request a quote with drawings and quantities, approve a mockup and submittal, release to milling and finishing, and coordinate sequenced delivery. The mockup step is the safeguard that locks grade, profile, and finish before material ships.
Prefinished Ipe siding is bought from a specialty hardwood supplier that stocks Ipe in depth, mills the profile, and oils all six faces before shipping ready to install. Ipe is naturally Class A (ASTM E84 index ~20), Janka ~3,680 lbf, and available in a full range of dimensions.
Factory-prefinished wood siding seals all six faces in a controlled environment before the boards see weather, while field-finished siding coats only the front face under uncontrolled conditions. The performance gap comes down to which faces are sealed and when, not the species or coating chemistry.
Wide-plank cladding is limited less by what a mill can cut than by how much a species moves, because a board too wide for its species cups and opens its joints. The widest stable planks come from modified woods, quartersawn or CVG stock, and properly dried dense hardwoods.
Custom profile milling means a supplier grinds knives to your exact face width, reveal, and tongue or shiplap geometry, to match a historic profile, an architect's bespoke reveal, or a clip system. Accuracy depends on a real reference sample, the species, and a held milling tolerance.
Jobsite delivery of wood cladding is about protecting the material and matching it to the install: freight that keeps boards dry and flat, delivery sequenced to the elevations being installed, and staging that protects finished faces. The common failure is dumping the whole order at mobilization.
Prefinished wood cladding carries production lead time because the boards are milled, finished on all six faces, and cured before they ship, so the order is planned backward from the install date. Lead time grows with a custom profile, a modified-wood species, or a specific finish.
Buying cedar siding in bulk comes down to nailing the grade, holding it consistent across the whole order, and sourcing from one place so color and milling match. Clear vertical grain and select tight knot are two different markets that do not mix on a wall.
Ordering T&G cedar for a whole custom home means buying the field, trim, soffit, and corners as one package, matched in grade and color, so the house reads as a single material. A real take-off up front is half the job.
Shou sugi ban is charred wood siding, sourced by specifying the species, the char level, and the finish, then having a supplier char, brush, and oil it before it ships. Cypress is traditional; cedar and Accoya char beautifully too. The char is a finish, not a code fire rating.
For shou sugi ban, cypress, cedar, and Accoya each char well but age differently: cypress is the traditional even char, cedar gives a deep textured black, and Accoya holds the char and oil longest because it barely moves. Choose by maintenance tolerance and stability.
Prefinished teak cladding and privacy walls are sourced from a specialty hardwood supplier that stocks teak, mills the profile or screen members, and oils the wood before it ships. Teak brings a golden color, marine-grade stability, and Class 1 durability to luxury exteriors.
Teak and Ipe are both Class 1 luxury hardwoods, but they split on color, hardness, and fire: teak is golden and light enough for screens, Ipe is darker, far harder, and reaches Class A fire performance untreated. Choose on the design and whether a fire rating is required.
FSC-certified wood cladding carries chain-of-custody documentation proving the wood came from responsibly managed forests, which is what LEED and most institutional projects require. The certification only holds if the supplier delivering the material holds FSC chain-of-custody.
What an architect needs from a wood cladding supplier is samples that match production, spec and submittal support at design development, custom milling, certified sourcing, and one source that ships nationwide. The right supplier keeps a spec from unraveling in shop drawings.
Which wood siding species meet WUI fire codes for wildfire-prone areas? Dense tropical hardwoods like Ipe achieve Class A flame spread without treatment. Comparison of species by fire performance, cost, and assembly requirements.
Realistic lifespan data for sapele (Entandrophragma cylindricum) in exterior siding applications — weathering behavior, UV degradation timeline, maintenance intervals, and comparison to competing tropical hardwoods.
Technical comparison of lap (bevel) and shiplap for weather resistance — water management physics, wind-driven rain thresholds, and when each profile is the correct specification.
A comprehensive species-by-species guide to selecting, ventilating, and installing wood soffits. Covers moisture management, fire-rated assemblies, dimensional stability, and long-term performance for architects and builders specifying exterior wood overhead applications.
How wood siding assemblies achieve STC 45–60+ ratings through species density, mass-air-mass decoupling, and rainscreen cavity design—with specification guidance for architects targeting acoustic performance in multifamily and commercial projects.
A comprehensive guide to selecting, specifying, and gaining approval for wood siding in historic districts—covering preservation standards, species matching, milling tolerances, and the regulatory process from application to final inspection.
A technical guide to fastener spacing, pullout resistance values, and species-specific nailing requirements for exterior wood siding — covering softwoods, tropical hardwoods, and thermally modified species with reference to IRC, ASTM, and AWC standards.
A technical guide to selecting and specifying wood siding for coastal environments, covering salt spray corrosion mechanisms, wind load calculations per ASCE 7, species durability ratings, and fastener compatibility for projects within 1,500 feet of saltwater.
A technical guide to specifying curved wood cladding, covering minimum bend radius calculations by species, steam bending vs. kerfing vs. lamination methods, substrate framing systems, and installation protocols for commercial and residential facades.
Engineering data on expansion gaps for wood siding — species-specific calculations, climate zone adjustments, and the consequences of too-tight or too-wide spacing.
Step-by-step guide to installing wood siding over rigid foam insulation — furring strip sizing and layout, fastener length calculations, drainage plane integration, and how to maintain a nailing surface through 1-4 inches of foam.
A profile-level guide for choosing tongue-and-groove, shiplap, or channel siding for exterior wood cladding, with weathering, installation, cost, and species considerations.
A practical specification guide for White Oak exterior cladding, including durability limits, cost drivers, finish options, profile selection, and procurement checks.
A sourcing guide for contractors and builders purchasing 5,000+ square feet of tongue-and-groove cedar siding for large custom homes, covering grades, lengths, lead times, and the advantages of specialty lumber suppliers over big-box retailers.
A comprehensive purchasing guide for commercial architects and general contractors sourcing premium wood cladding at scale, covering supply chain management, lead times, specification submittals, mock-up approvals, and why working with a specialty lumber supplier like McIlvain reduces project risk and compresses schedules.
A comprehensive guide to sourcing premium hardwood lumber for exterior fence and gate construction, covering species selection (Ipe, White Oak, Cypress, Cedar, and more), post sizing, rail dimensions, hardware compatibility, and weathering expectations for 25-50+ year service life.
A technical analysis of wood siding's thermal resistance contribution to wall assemblies, covering R-values by species and thickness, energy code compliance paths under IECC and ASHRAE 90.1, and how thermally modified and acetylated wood products perform in high-performance building envelopes.
A technical analysis of UV fade resistance across exterior wood siding species, finish systems, and exposure orientations—covering accelerated weathering data, pigment loading, and specification strategies for 10- to 30-year color retention targets.
A practical specification guide for sealing end grain on exterior wood siding, including why field cuts fail, which sealers to use, and how to detail butt joints, corners, and prefinished boards.
Species selection and sourcing guide for premium hardwood fences and gates — Ipe, sapele, mahogany, and Accoya options for residential privacy fences, estate gates, and commercial perimeter structures that outlast cedar by decades.
Sourcing guide for wide-plank (8-12") exterior cladding and decking from a single supplier — species with available widths, stability requirements for wide boards, and why single-source procurement eliminates color and grade matching problems.
Specification guide for wood cladding on coastal hospitality projects — salt-spray durability data, species rated for marine exposure, commercial-scale maintenance strategies, and the business case for premium materials on high-ROI facades.
Sourcing guide for drop channel (WP-11) siding profiles in western red cedar and baldcypress — dimensions, grade options, pricing, and suppliers for residential exterior cladding projects.
A guide to vertical wood siding for contemporary architecture — species selection, profile options (board-and-batten, channel, T&G), width proportions, and installation details for modern residential facades.
How to source custom-milled wood siding profiles with national job-site delivery — species availability, minimum orders, lead times, profile design process, and what to expect from a full-service lumber supplier.
Detailing guide for transitions between different siding profiles on the same facade — horizontal-to-vertical, profile-to-profile, and material-change transitions with flashing, trim, and alignment strategies.
When furring strips are required vs. optional behind wood siding — code requirements, climate-zone guidance, material options, spacing specifications, and how a ventilated cavity extends siding life by 2-3×.
Thermal modification heats wood to 400°F+ in oxygen-free kilns, permanently altering its cell structure. The result: Class 1 durability without chemicals.
A practical sourcing and specification guide to board-and-batten siding in Western Red Cedar and Baldcypress, covering board widths, batten spacing, expansion gaps, fastening for wide boards, and how the two species compare on density and decay resistance.
A code-driven guide to selecting fire-compliant exterior wood cladding for commercial buildings, covering ASTM E84 flame-spread indices, Class A/B ratings, NFPA 285 assembly testing, IBC construction types, and WUI requirements.
Head-to-head performance comparison of thermally modified ash and western red cedar for exterior cladding — durability, dimensional stability, maintenance requirements, installed cost, and 25-year lifecycle analysis.
The science behind wood siding failures — warping, cupping, and splitting — and the proven prevention strategies that eliminate them. Species selection, moisture management, installation details, and finish systems ranked by effectiveness.
A data-driven comparison of the top exterior siding species for Northeast climates — from eastern white cedar to thermally modified ash — with Janka hardness ratings, dimensional stability data, and 25-year lifecycle costs.
Performance analysis of baldcypress (Taxodium distichum) siding in coastal salt-air environments — including decay resistance data, salt tolerance, moisture management, and comparison to competing species.
Over a 25-year period, premium tropical hardwood decking (Ipe or Cumaru) costs less than composite decking when you factor in the composite's 15-20 year replacement cycle.
Both Ipe and Cumaru rank among the hardest, most durable tropical decking species available. But they differ in cost, color, workability, and long-term performance.
Plantation teak, old-growth Burmese teak, and reclaimed teak each offer different performance characteristics. Understanding FEQ, select, and standard grades helps architects specify with confidence.
Sapele offers ribbon-stripe figure and superior hardness at 60% of mahogany cost. But genuine mahogany machines more predictably and holds finer detail.
When the Salk Institute needed to restore its iconic teak window walls after 50+ years of Pacific salt air exposure, they turned to McIlvain for 12,000 board feet of FSC-certified Burmese teak.
FSC Chain of Custody certification traces every board from forest to jobsite. With LEED v5 awarding up to 3 points for FSC-certified wood, heres how to specify correctly.
With a Janka hardness of 3,680 lbf and a Class 1 durability rating, Ipe outlasts every competing decking material. Grading, sourcing, installation, and the 40-year maintenance timeline.
