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Outdoor Timber
Outdoor timber for garden buildings, pergolas, decks and landscaping: posts and beams, joists, battens, boards, handrails, sleepers and sauna timber, in oak, cedar, Douglas Fir, larch, Yellow Balau, Ecowood and C24. We also stock the hardware and oils to finish the job. Everything is stocked in our warehouse and delivered across Ireland.
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Outdoor Timber for Sale in Ireland
Our outdoor timber range covers the structural and landscaping timber for garden projects: posts and beams, joists, battens, boards, handrails, sleepers and sauna timber, with the hardware and oils to match. Everything is stocked in our warehouse and delivered across Ireland.
Choosing the Best Wood for Outdoor Use
- Oak: Durability Class 2 hardwood for beams, posts and sleepers that have to last, with no preservative needed.
- Cedar: light, stable and naturally durable, for battens, screens and pergola posts.
- Douglas Fir: strong for its weight and straight grained, for exposed beams and pergolas.
- Larch: the toughest common softwood, for battens and cladding.
- Yellow Balau: a dense tropical hardwood, for boards, battens and posts.
- Ecowood: our own kiln dried softwood, stable and good value for long runs.
- MicroShades: treated and factory finished, so there is nothing to treat on site.
- C24 construction timber: strength graded softwood for frames and structures.
Timber Beams, Joists and Battens
Choose timber beams by the load and the look, joists by the span, and battens by what you are fixing to them. For any beam or joist that carries a structural load, have an engineer or a span table confirm the size for your span. Use stainless steel fixings with oak, cedar and hardwoods, and stand posts on a base rather than burying them.
Protecting Outdoor Timber
Every outdoor timber weathers to silver grey. Durable species last without treatment, but most people oil them to keep the colour, and softwoods last longest with a finish. See our wood oils and stains.
Posts & Beams
Structural posts and beams from 69×69 mm up to 200×200 mm, for garden buildings, pergolas, decking supports and general outdoor construction.
Cedar
Naturally rot resistant Western Red Cedar, light enough for one person to handle, for exposed pergola and screen posts.
European Oak
A dense, Durability Class 2 hardwood that lasts outdoors without preservative, for pergolas, porches and feature beams.
View European Oak Posts & Beams
Douglas Fir
Strong for its weight and straight grained, the softwood of choice for exposed beams and pergolas.
View Douglas Fir Posts & Beams
Ecowood
Our own kiln dried softwood in square sections, stable and good value for pergolas and carports.
Spruce
A light, versatile softwood for general outdoor structures, kept protected with a finish over its life.
Joists
Structural joists from light 3×2 sections up to deep 9×2, to support decking, garden buildings and other outdoor structures.
European Oak
Heavy sawn oak joists for frames that stay on show or have to match oak posts and beams.
Douglas Fir
Sawn joists in one of the strongest softwoods, including heavy 70 mm thick sections for longer spans.
Ecowood
Kiln dried softwood joists, light to carry and stable on site, for most garden decks.
MicroShades
Treated joists with a factory applied finish, so there is no treatment step on site.
Hardwood
A dense hardwood joist, planed all over, and the natural frame under a hardwood deck.
Battens
Timber battens, mostly in 2×1 and 4×1 sizes, for slatted fences and screens, cladding support and outdoor framing.
Cedar
Clear grade Western Red Cedar in the widest choice of widths, naturally durable for screens and cladding.
Ecowood
Our own kiln dried softwood, and the value choice for long fence and screen runs.
MicroShades
Factory finished battens that look complete the day they go up, with nothing to treat on site.
Larch
Dense larch in a warm reddish-brown, the most weather resistant of the common softwoods.
Sauna
Everything for a sauna build, from wall cladding to benches and accessories, chosen to cope with high heat and humidity.
Sauna Cladding
Alder tongue and groove and triple slatted Ayous and Thermo Spruce boards for sauna walls and ceilings.
Sauna Benches
Knot free alder bench boards that stay comfortable against bare skin at full temperature.
Sauna Accessories
The glass sauna door, protection wax and alder corner trims that finish the room.
Hardware
The brackets, connectors and fixings that hold an outdoor timber structure together and keep it sound.
Pole Holders
Holders that anchor timber posts above the ground, so the end grain can dry out.
Beam Hangers
Hangers that support and secure beams where they meet the rest of the frame.
Connectors
Structural connectors to join posts, beams and joists in outdoor frames.
Concrete Bases
Bases that anchor timber posts in the ground for long term stability.
Screws
Screws made for outdoor timber construction projects.
Maintenance
Oils, stains and cleaners that protect outdoor timber and keep its colour through Ireland’s wet, changeable weather.
Oils & Stains
Penetrating, pigmented and clear UV oils, a new wood protector and cleaners, all of which soak in rather than peel.
C24 Timber
Kiln dried structural softwood, strength graded to C24, for load bearing frames and construction work. The sawn range is untreated, for dry work inside a building; outdoor frames need the treated range.
Sleepers
Heavy landscaping sleepers for garden borders, raised beds, retaining walls and steps.
European Oak
New, untarred oak sleepers, Durability Class 2 and safe beside food crops, children and pets.
Frequently Asked Questions About Outdoor Timber
What is the best wood for outdoor use?
It depends on how long you need it to last and how much upkeep you plan. Of the timbers we stock, Yellow Balau is Durability Class 1, European Oak and Western Red Cedar are Class 2, and Larch and Douglas Fir are Class 3. The lower the class number, the more naturally resistant the timber is to rot and insects.
Which outdoor timbers can be used without preservative treatment?
Cedar, Oak and Yellow Balau are naturally resistant to rot, insect attack and fungal decay, so they need no chemical treatment. MicroShades arrives factory treated and finished. Spruce is Durability Class 4, so outdoors it needs a protective finish kept up over its life.
Should I oil outdoor timber or let it go grey?
Left bare, most of our species weather to silver grey within twelve to eighteen months. Durable timbers don’t need oil to last, but most people oil them to keep the original colour, and softwoods last longest with a finish. See our wood oils and stains.
What fixings should I use with outdoor timber?
Use stainless steel. The tannins in Oak and Cedar react with galvanised and mild steel and leave black streaks, and the copper in pressure treated timber corrodes zinc plated screws. Pre-drill near the ends of every piece, and at every fixing on dense hardwoods such as Yellow Balau.
Can I use construction timber for outdoor projects?
Only the treated range. C24 treated timber is pressure treated for decking frames, pergolas, sheds and anything touching masonry or the ground. C24 sawn is untreated and belongs inside a dry building.
Why is my new timber bleeding colour or resin?
It is normal and it stops. Douglas Fir and Larch can bleed a little resin from fresh cuts and knots until the timber dries, and Yellow Balau releases natural pigment in its first few weeks outdoors. Rinse any runoff off paving or walls while it is fresh.
What timber is best for posts and beams?
Oak is the most durable choice for posts and beams outdoors, and Douglas Fir is strong, straight and lighter to handle. See our timber posts and beams.
What size joists do I need?
It depends on the span and the load. For any joist that carries a structural load, have an engineer or a span table confirm the size. Each joist’s section is listed on its product page. See our timber joists.