And the answer is yes. Sometimes. Wood can be left unfinished if it won't encounter weather, water or significant handling. If your project is placed outside, will be somewhere wet, or will be used on a regular basis, then you should apply wood finish.
Bare wood, when left unfinished, keeps your furniture with a natural wood look but the risk is exposing it to harsh elements, even if it's indoors, such as light, dust, moisture and water damage, making it more susceptible to stains, warping and cracking.
If you leave furniture raw without applying a new coat of wax or poly you are taking a risk of your furniture drying out, cracking, swelling or staining. To limit wood damage, preserve furniture AND keep it looking natural you'll want to seal raw wood with Liming or Cerusing wax.
Unfinished wood furniture means the piece of furniture has been put together by craftsman, but still needs a finish (such as stain or varnish) to be applied.
Unfortunataly there's very little to do but wait and see. Whether it warps or discolors or both will be revealed in the next 2 or three days. What is going to happen is the wood grain will be "raised". All this means is the fibers that make up that particular section of wood that got wet will swell from re-hydrating.
Some say that untreated 2×4's can last up to two years before showing signs of rot and others say it can last even longer. When deciding if you should you use an untreated 2×4 it depends greatly on the application, how much weather and sun it's exposed to and if it's making ground contact.
Seasoning or Air-Drying Wood: The One-Year Rule
In fact, expect most types of wood to take about one year per inch of thickness to dry out. If it's a two-inch log, that means you'll need to let it sit outdoors for two whole years before it's dry enough to efficiently burn.
Untreated wood is the most susceptible to rot, fungi, and general weathering. It's extremely important that you use a wood preservative first. You can either use a wax enriched preservative for an all-round coating or alternatively use a wax-free preserver if you want to then use a stain or a paint on top.
Untreated Wood
Left in their natural, unfinished state, most woods deteriorate quickly when exposed to outdoor environments. However, there are several species that have naturally occurring chemicals that help them shrug off harsh weather and insects.
Wood can be left unfinished if it won't encounter weather, water or significant handling. If your project is placed outside, will be somewhere wet, or will be used on a regular basis, then you should apply wood finish.
-If it is a piece that will get a fair amount of use – like a tabletop; apply a coat or two of soft beeswax based paste wax to protect it.
Polycrylic topcoats are my sealer of choice for most projects, as they don't tend to yellow as often as polyurethane. Clear furniture wax can also be used to seal natural wood projects. Furniture wax provides a soft, silky finish to a piece, which can be lovely.
Since unfinished flooring is basically raw wood, it's like working with a clean slate. In contrast, prefinished flooring comes straight from the manufacturer with stain and several coats of finish already applied, so there's no changing it.
You may or may not need more than one coat, depending on the paint type you choose. If so, it's vital to let the first coat dry properly first or you'll make an awful mess of it. As a general rule, two coats deliver a better sheen and a deeper, fuller finish than one.
This is why non-pressure treated wood is still required for use indoors, and why builders recommended that you only use pressure treated lumber for the support structure of a deck and switch to untreated wood for the surface. Any location where pets and kids spend time regularly should be built with non-treated wood.
But building code dictates where you can use treated wood in applications — usually where there is risk of excessive moisture. Generally speaking, any wood used in outdoor projects should be pressure-treated.
Whether the wood is used to build a kitchen cabinet, or to frame out a house, it must be dried before it can be used. Let's take a look at some of the reasons why. Trees contain a lot of water. Every part of a tree, from the leaves down to the roots, has some amount of water in it.
Wood from trees, like stumps, branches, and limbs will take a very long time to decompose, upwards of 50-100 years if left whole. This is why for composting it's best to chip the wood.
If possible, allow your wood to dry outside before bringing it in. Otherwise, aim a fan at the wet wood to allow proper air circulation. OUTSIDE UNDER A ROOF – This is the best way to keep your wood dry, especially if you have it raised a few inches off the ground.
Eventually, the wood will reach a moisture content that is in equilibrium with the surrounding ambient air and humidity. While a 1-inch red oak board may take two to three months to air-dry, a 2-inch board may take six to eight months, and even thicker lumber may take years.
It may seem unnecessary to sand bare wood before painting, but stock lumber is often coated in a glaze to help protect it. Removing that coating will help the paint adhere. In addition, sanding opens the grain of the wood, which can also help with adhesion.
Yes, the sun can warp wood. The heat from the sun causes the wood to expand, and this can cause warping. Changes in humidity can also cause warping, so it's important to keep an eye on the weather if you're worried about your wood warping. Pine wood warps when it is not properly dried or treated.
Paint protects the wood and also seals the tiny cracks and gaps that you might not even know exist in your building's exterior. These small blemishes start to get bigger if they're left without any treatment. Sooner or later, you'll have to deal with a much larger and more expensive problem.
Pressure treated lumber is no stronger than untreated lumber. The difference between the two is that pressure treated lumber will resist the elements better than untreated due to chemical preservatives added, and so will maintain its integrity in conditions that would cause normal wood to rot.