Larix decidua
Learóg Eorpach
The one European softwood that will sit outside untreated, and the most decorative of the group. Hardest conifer KORENA lists, at the cost of fighting resin at every stage.
- This species is recorded as commercially grown in Europe. This does not establish where an individual piece was harvested; check its origin details.
- Grúpa luibheolaíoch. Is buaircínigh iad bogadhmaid; is crainn leathanduilleacha iad crua-adhmaid.
- Fine luibheolaíoch an speicis.
Faigh fógra nuair a thagann séSpeiceas tagartha. Níl píosaí i stoc faoi láthair.
An oireann sé do do thionscadal?
Iontach do
- Tabletops
- Exterior cladding
- Garden furniture
- Flooring
- Boat and dock work
Níl Learóg Eorpach san eisiúint reatha
Speicis chomhchosúla i stoc
Níl Learóg Eorpach againn anois. Oireann na speicis seo do na tionscadail chéanna agus tá píosaí ar fáil.
Faigh fógra faoi Learóg Eorpach
Seolaimid ríomhphost chugat nuair a thagann leaca úra Learóg Eorpach chuig KORENA. Tá gach píosa uathúil, mar sin is fiú fógra luath.
Cuma an adhmaid
An chuma atá air
The most visually striking of the European softwoods. Heartwood runs warm honey to a deep russet brown against narrow pale sapwood, and the boundary between the two is sharp and decorative. Growth rings are strongly marked because the latewood bands are dense and dark, which gives flatsawn faces a bold cathedral figure closer to a ring-porous hardwood than to spruce.
- Honey to russet brown heartwood, deepening with UV exposure
- Narrow pale cream sapwood in sharp contrast
- Strongly marked growth rings with dark dense latewood bands
- Crua i gcomparáid le bogadhmaid; fáinní fáis infheicthe.
Ag obair leis
Ag obair leis
Most hand and machine operations give good results, and larch is stiff and strong enough to feel substantial under the tool. The complication is resin. Natural resins gum up saw blades and clog abrasives, and the problem worsens as the wood warms during a cut. Keep blades clean, take breaks in long rips, and expect to clear the sole of a plane more often than usual. The dense latewood bands can also tear out where grain rises.
Bailchríoch
Resin is again the issue. Wipe the surface with denatured alcohol or acetone before finishing to lift surface resin, or oil finishes may stay tacky in patches. Once clean it takes oil beautifully and the colour deepens to a rich amber. For exterior work, a penetrating oil renewed annually outperforms film finishes, which crack and lift on a wood this dimensionally active outdoors.
Stálú
Slower and more troublesome than spruce or fir. Larch is prone to distortion and to surface checking if dried too fast, and the high resin content means a hot kiln schedule will drive resin to the surface where it sets sticky. Air drying followed by a low temperature kiln is the standard route for slab stock. Expect around 12.5 percent volumetric shrinkage, and note that internal stress from poor drying shows up as spring and bow once the slab is ripped.
Cé mhéad a bhogfaidh sé?
Atann agus crapann adhmad trasna a leithid de réir mar a éiríonn an t-aer níos taise nó níos tirime. Meas gluaiseacht shéasúrach barr Learóg Eorpach sula ndearann tú na feistis.
Gluaiseacht shéasúrach mheasta
thart ar 9.4 mm
Ceangail an barr le cnaipí nó lúibíní sliotánacha, ní le gliú ná scriúnna teanna.
Samhail líneach craptha: leithead × (crapadh ÷ 28 % sáithiú snáithíní) × luascadh séasúrach cion taise. Úsáidtear crapadh tadhlaíoch 8.2 % do Learóg Eorpach. Meastachán pleanála, ní ráthaíocht.
An costas
Sábháilteacht agus foinsiú
- This species is recorded as commercially grown in Europe. This does not establish where an individual piece was harvested; check its origin details.
- Stádas Liosta Dearg IUCN: measúnú domhanda caomhnaithe an speicis seo.
Species within the Larix genus have documented cases of skin irritation, hives and skin lesions, though severe reactions remain uncommon. Resin contact is the usual trigger rather than dust alone. Gloves during handling of freshly cut stock and normal extraction during machining are appropriate.
Léigh an treoir iomlánNótaí mionsonraithe ar phatrún, athrú datha, oibriú agus cobhsaíocht.
What European Larch actually is#
Larix decidua is the conifer that drops its needles. That deciduous habit is the visible oddity, but the useful consequence is in the timber: larch lays down dense, resin-rich latewood in a way that no spruce or fir does, and the result is a softwood that behaves in several respects like a light hardwood.
It is the hardest conifer in the KORENA catalogue at 3,290 N on the Janka scale, which puts it above every pine and fir here and roughly level with small-leaved lime. It is the only one rated durable enough to go outdoors untreated. And it is by some distance the most decorative, with a heartwood and sapwood contrast and a ring figure that reward flatsawing.
The trade-off is resin, and resin complicates every stage from ripping to finishing.
Reading a larch slab#
Two things drive the value of a larch slab: ring spacing and the heartwood to sapwood ratio.
Ring spacing is the durability signal. Slow-grown Alpine larch from high altitude puts down rings a millimetre or two apart, with a high proportion of dense dark latewood. That material is genuinely durable outdoors and considerably stiffer. Fast-grown lowland plantation larch can have rings five or six millimetres apart, much less latewood, and measurably worse durability. The two look related but do not perform alike. If the piece is going outside, ring count is the number to ask about.
Ceisteanna ceannaitheoirí
Ceisteanna ceannaitheoirí
Can European Larch be used outdoors untreated?
Yes, within limits. It is rated moderately durable, which is the best of the European softwoods KORENA lists and good enough for cladding, decking and garden furniture without preservative. Ground contact is a different matter and will shorten its life considerably. Slow grown Alpine stock with tight rings outperforms fast grown plantation larch noticeably.
Why do my saw blades gum up cutting larch?
Natural resin content, which is also what gives larch its durability. The resin softens with the heat of cutting and deposits on the blade. Clean blades with a resin solvent between operations, feed at a steady rate rather than forcing the cut, and clear plane soles regularly. It is a nuisance rather than a real obstacle.
How hard is larch compared to oak?
Larch is 3,290 N on the Janka scale against 4,980 N for European oak, so meaningfully softer but by a long way the hardest softwood in this catalogue. It is roughly on a par with small-leaved lime and harder than every pine and fir here. For a tabletop it is a reasonable compromise between weight and durability.
Why is my oil finish staying tacky?
Airíonna meicniúla
Sonraí teicniúla
Luachanna tagartha foilsithe. Nuair nach n-aontaíonn foinsí, taispeántar an raon agus úsáidtear an luach tipiciúil do na scálaí thuas.
| Dlús (kg/m³)Mais in aghaidh an mhéadair chiúbaigh ag cion taise thart ar 12 %. Bíonn adhmad níos troime níos crua agus níos láidre de ghnáth. | 575 kg/m³ |
|---|---|
| Cruas Janka (N)An fórsa chun liathróid chruach a bhrú leath bealaigh isteach san adhmad. Gnáththomhas ar fhriotaíocht in aghaidh eangaithe. | 3,290 N |
| MOR: modal réabtha (MPa)Neart lúbtha: an t-ualach ag a mbriseann bíoma. | 90 MPa |
| MOE: modal leaisteachais (GPa)Righneas lúbtha: a mhéid a lúbann seilf nó barr faoi ualach. | 11.8 GPa |
| Crapadh gathachCrapadh trasna na bhfáinní fáis, ó úr go stálaithe in áith. Bogann cláir ghearrtha ina gceathrúna mar seo. | 4.2 % |
| Crapadh tadhlaíochCrapadh feadh na bhfáinní fáis. Bogann cláir réghearrtha agus formhór na leac mar seo. | 8.2 % |
