As soon as you start researching what type of structural particleboard flooring you need for a flooring project, the first thing that stands out is the multiple colors the pvc tongue insert comes in, quickly followed by the question – ‘what colour means what?’ So whatisthe difference between the different colours such as Yellow, Green, Orange and the rest?
The various coloured tongue flooring is structural grade particleboard commonly used for subfloors in Australia and NZ, where the coloured PVC strip is used as the tongue component of a tongue and groove (t&g) arrangement. In this blog post, we will discuss what to look out for when trying to tell them apart from one another so that you can make an educated decision with ease based on various material qualities and settings. We also go over the performance requirments for the installation of structral particleboard and AU/NZ specifications for particleboard flooring which are acceptable.
Yellow Colour Tongue Particleboard Flooring: What It Means
Getting straight to the point if you’re in a hurry and haven’t got time to drill into the mysterious depths of coloured tongue structural flooring in Aus and NZ, here is the short answer:
- It is a19mm thickstructural grade particleboard manufactured by Australian Panel Products (formerly Borg Manufacturing) under the brand STRUCTAFlor.
- It is intended for interior use in domestic construction and is particularly suited to platform construction, primarily used for subfloors with a joist spacing of no more than 450mm prior to the erection of walls.
- In terms ofsizes, it is available in widths of 3600×800 and 3600x600mm.
- In regard towaterproof status, it is designed to withstand a short period (a few months) of intermittent rain exposure during the construction process, so it is more a case of resistance.
- Weightis approximately 30kg per sheet.
As far as an alternative to this STRUCTAFlor option, there are similar 19mm thick structural grade particleboard alternatives manufactured by D & R Henderson (orange tongue), and Laminex (green tongue – see next section). Also, see Table 1 below for more details and specifications.
Keep on reading if you want to find out how its specifications fit in with all the other colours and brands of structural grade particleboard sheet flooring.
What Is Green Tongue Flooring?
Green tongue flooring is one of the popular alternatives to the yellow option:
- Green tongue flooring is a 19 mm thick structural grade particleboard product manufactured by Laminex in Australia.
- It is intended for interior use in domestic buildings, primarily used for subfloors with a joist spacing of no more than 450mm.
- It is available in widths of 3600×900.
- While it is manufactured to comply with the same AS/NZS 1860.1:2017 specification as the yellow option, it is generally considered by the industry to have better long term moisture-resistant properties, so is often used in situations where there is higher humidity and a likelihood of increased moisture exposure.
- It is also a termite-treated version available.
There are similar 19 mil thick structural grade particleboard products manufactured by D & R Henderson (orange tongue), and Australian Panel Products (STRUCTAFlor Yellow). See Table 1 below for more details.
What Is Red Tongue Flooring?
Again, the short answer for red tongue flooring:
Red tongue flooring is a 22mm thick particleboard sheet flooring for use in domestic and residential construction. The product is manufactured by Australian Panel Products (formerly Borg Manufacturing) under the brand STRUCTAFlor. It is intended for interior use in domestic construction, primarily used for subfloors with a joist spacing of no more than 600mm. It is available in widths of 3600×800 and 3600x600mm. It is also available as a termite-treated version called TERMIFlor and as a foil backed termite treated version called R-Flor.T
There are similar 22mm thick structural grade particleboard products manufactured by D & R Henderson (burgundy tongue), and Laminex (beige tongue). See Table 1 below for more details.
Country Differences
T&G chipboard for subflooring does exist in the UK, but is not commonly available with the coloured PVC tongue – instead, the tongue is a milled down section of the chipboard.
OSB or plywood is typically used in the United States for structural flooring, so the whole coloured PVC tongue structural particle subflooring thing is pretty much an Aus / NZ thing.
Confusion On What The Coloured Tongues Represent
To say there is some confusion about what the different coloured PVC strips indicate is an understatement. The reason for this confusion is that there is no overall standard for the various colors of the tongues across the three main Australian companies that manufacture them. If you do research online about the issue, you will find numerous definitive statements about that state of things in woodworking forums, etc, but when you drill down into the daisies, it turns out that the answer you think you found is not definitive, and doesn’t completely make the issue clear.
Different System For Each Company Based On Thickness
The only way through this is to understand that the three different manufacturers use various colour tongues to differentiate their own range of structural particleboard, but the ‘system’ one company use is not the same system as a competitor does.
The trick is to look at what the different colour tongues mean per manufacturer and why and how they are differentiating their particleboard offering with tongue color. Although each manufacturer uses a different tongue colour system, they assign a single colour to one of the three different particleboard thick profiles commonly available (19 mm, 22mm, 25mm). In some cases, they will use a coloured wax edge strip on the board to indicate other treatments – mostly associated with termite resistance.
Joist Spacings Based On Particleboard Thickness
The difference in thickness changes the allowable joist spacing. So a 19ml particleboard can have a maximum floor joist spacing of 450mm, while a 22mm thick board can have a 600mm joist spacing.
Australia / New Zealand Structural Particleboard Standard
The standard that governs the manufacture of particleboard flooring is AS/NZS 1860.1:2017 and sets out the minimum performance requirement. It specifies two classes. Class 1 flooring is for use in Australia where during construction, prolonged exposure to an ambient temperature above 25°C under moist conditions can occur. Class 2 is not suitable for Australian conditions.
What Are The Similarities Across All Colours?
All t&g structural particleboard have some basics in common, all based around the AS/NZS 1860.1:2017 standard.
It is all manufactured from particleboard. The t&g feature allows boards to be laid flat without gaps or overlapping. The grooves on one board align with the tongues from an adjacent board, forming perfect seals when nailed together. For any of the water-resistant versions, this feature goes a long way to maintaining a water-tight seal when laying a subfloor. This tongue-and-groove approach interlocks at every joint to create a seamless surface that’s perfect for high-traffic and high moisture areas such as kitchens or bathrooms.
Moisture Resistance Qualities Of Structural-Grade Particleboard Sheeting
Structural-grade particleboard sheeting can be exposed to the elements for up to three months, but it’s always a good idea to enclose a building as soon as you finish installing it. You should get rid of any ponded water as soon as possible. If there’s ponding on the floor, you can get rid of it by drilling holes 3mm maximum diameter at least 1 meter apart and sweeping water away.
Keep packs off the ground when storing them outside. Cover the product with waterproof sheeting so that air can circulate freely.
So while the material will tolerate some weather, it should be covered as soon as possible. If you peer through the fence at a residential building site while taking a weekend walk through the suburbs, you will often see it laid as subflooring before the roof is on, but sure enough, not long after, the roof will be on, protecting the subflooring for anything more than the odd passing shower during the building process.
Where To Buy Structural-Grade Particleboard Sheeting
Onsite Timberin Sydney Sheets supply sheets of 3600 x 800 x 19mm. They originally sold it at a width of 900mm but changed to 800mm in late 2019. They also sell two other different coloured tongue products that are the same size but have different thicknesses. Blue Tongue has a thickness of 25mm, Red Tongue is 22mm along with their Yellow option is 19mm. So this is a case of different colours being used to denote different thicknesses.
Bunnings and others sell STRUCTAflor, manufactured by Borg Manufacturing. STRUCTAflor uses the same coloured tongue system as what Onsite Timber sells, where the different colours represent different thicknesses of the same product. However, STRUCTAflor uses another coloured coding system based on wax applied on the edges of the product to denote other qualities. The edge is coated with coloured wax to indicate other treatments other than thickness. A yellow edge wax represents general purpose use, a light blue wax edge indicates H2 termite treatment and a blue wax edge indicates termite treatment with the addition of a foil backing to improve insulation (this product is marketed as R-Flor).
What Does It Look Like?
The boards have an off-white coloration that becomes yellow when the sheets absorb water or humidity causing them to swell up.
This yellow color is a result of the wood pulp in the sheets reacting with moisture.
Green Tongue Flooring
There is no certain differences between Green and Yellow per se, because manufacturers tend to use color differentiation for their own purposes in different countries.
In Australia, green tongue flooring is particleboard made to protect against damp and humid conditions. and the flooring is normally 800mm as opposed to 900mm thick.
In the US, some manufacturers call termite-treated particleboard green tongue flooring, while like Australia, others add degrees of water-resistant treatments to it. In this case, you will hear Green Tongue Flooring it called “aquatech” or “aquatight”. It uses water-resistant glues and is mostly used for wet areas. The pricing of green tongue flooring is more than the yellow, but it’s also used for areas that need to be waterproof.
Differences Between Yellow And Green Tongue Flooring
have tongues that help keep boards together tightly when installed, the green tongue uses water-resistant glue while the yellow does not. This allows them to install as an option on surfaces where water might come into contact with the surface such as pool decks or kitchens with leaking pipes above countertops. The pricing can vary depending on the amount you are installing (more if just doing one area) and what your needs are (green is better at resisting moisture).
The yellow version has a lower price point than its green counterparts which makes them excellent for first-time installers who may need to replace some boards if something comes up during installation; however, this means that water damage is a risk.
Frequently Asked Questions For Coloured Tongue Structural Flooring
What is an alternative to this structaflor flooring?
Any 19mm tongue and groove structural particleboard that meets Aus and NZ standards AS/NZS 1860.1 can be substituted. This includes orange tongue manufactured by D&R Henderson, or green tongue manufactured by Laminex. If a thicker board can be accommodated, then a 22mm thickness red (STRUCTAFlor), burgundy (D&R Henderson) or beige (Laminex) could be used instead.
Is yellow tongue flooring waterproof?
This type of flooring is not waterproof. It is designed to withstand moisture for a few months during the building process but then requires a dry environment once in place for the long term.
Red tongue flooring vs yellow tongue flooring – which is best?
Yellow is 19 millimeters thick and requires a maximum joist spacing width of 450mm. Red is 22mm thick and can be used at joist spacing widths of 600mm. Both are manufactured under the brand of STRUCTAFlor and comply with Australian and New Zealand standards AS/NZS 1860.1.
What are the available flooring sizes?
Yellow tongue flooring is available as 3600 x 800mm and 3600 x 600mm. It was previously available in 3600 x 900mm but is no longer made in that size. If 3600 x 900 mm is required for 19-millimeter structural tongue and groove particleboard flooring, orange tongue (D&R Henderson) or green tongue (Laminex) should be substituted.
Structural flooring: which side up?
It is raw on one side and greasy on the other.Glue is used to attach the raw surface to the floor.The greasy wax side faces upward to protect the surface from moisture.
Can structural particleboard floors get wet?
Although the yellow has a waxy surface on one side to help protect it from moisture, it is made from particleboard. In wet areas, particleboard should not be used for a subfloor.Instead, use FC sheeting.So it can withstand moisture for a short period of time during the initial building process, but it isn’t designed to withstand moisture over the long term.
What is the difference between yellow and orange tongue flooring?
Yellow tongue flooring is a 19 mm thick structural particleboard flooring made by STRUCTAFlor in Australia. It is specified for a maximum joist spacing of 450mm. It is available in 3600mm x 800mm and 3600mm x 600mm.
Orange tongue flooring has the exact same specifications other than it is manufactured in Australia by D&R Henderson and is also available in 3600m x 900mm.
Conclusion
So which one should you go for? Ultimately, depending on your needs, you can decide which option will work best for you. Yellow has a lower cost point but does not offer as much protection from water damage while green costs more initially but offers excellent resistance to moisture.
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FAQs
What is the difference between red and yellow tongue flooring? ›
The main difference between red tongue flooring and yellow varies the price. Red tongue flooring is cheaper than the yellow variant flooring because it's made from different materials and has a higher moisture content.
What's the difference between yellow tongue and orange tongue flooring? ›Orange tongue flooring vs yellow tongue flooring
They are both 900 mm on average. The yellow tongue can be 3600 x 900 mm or 1800 x 900 mm long, while the orange tongue is usually 3600 x 900 mm long.
Features. STRUCTAflor® H2 Treated Structural Flooring is a termite protected structural grade particleboard sheet flooring for use in domestic and residential buildings. It is particularly suited to platform construction (where the floor is laid prior to the erection of walls) as well as fitted floor construction.
How do you waterproof a yellow tongue floor? ›One system in our range is the express lay sheeting over yellow tongue flooring. It will act like a
Is green tongue better than yellow tongue? ›You can get most colors in termite or non-termite treated. Basically the color of the tongue purely determines the thickness, but can change depending on the manufacturer. So green tongue is essentially identical to yellow tongue, except it's normally 800mm as opposed to 900mm.
How do you seal particle board flooring? ›Apply a layer of clear acrylic sealant on all the edges of the particle board pieces. You should also apply a layer to any areas that may be exposed to moisture. To do this, you need to shake the clear acrylic sealant can, open the lid, and then paint the sealant onto the particle board using a paintbrush.
Can you waterproof over yellow tongue? ›Bathrooms, toilet, laundries and even kitchens need to have the floor fully waterproofed and you can't 'seal' or waterproof directly onto Yellow Tongue & Groove flooring. Using this material is illegal and frowned upon within the industry.
Which side goes up on a yellow tongue floor? ›Yellow tongue has a raw side and a greasy side. Floor is glued to the raw side. Greasy side faces substrate as the wax helps prevent moisture entering the yellow tongue.
How thick is particleboard flooring? ›Particleboard panels are manufactured to a precision thickness of +/- 0.015 inch, and provide a level base and even joints for floor coverings. They also resist impact of denting, yet are resilient and comfortable underfoot.
What is H2 particleboard? ›STRUCTAflor H2 is termite protected structural grade particleboard sheet flooring, providing cost-effective long-term defence against termite damage.
How long does yellow tongue affect weather? ›
Exposure, Storage & Handling
STRUCTAflor may be exposed to the weather for up to 5 months, however it is always advisable to enclose the building as soon as possible after laying the floor. Any ponded water should be removed as soon as practicable.
Standard is structural grade particleboard sheet flooring for use in domestic and residential buildings. It is particularly suited to platform construction (where the floor is laid prior to erection of walls) as well as fitted floor construction. 19mm thickness is suitable for use over 450mm joist spacing.
Do you need to seal yellow tongue flooring? ›The yellow tongue comes with a waxy coating designed to protect it from weather prior to the roof being put on a dwelling. This will repeal any stain or coating, and you'll need to sand the flooring before staining. Using polyurethane over chipboard is not something that our suppliers recommend.
Is particle board good for flooring? ›Particleboard, which kind of looks like oatmeal, is comprised of small wood particles that are glued and formed into sheets. These boards, which are typically manufactured in 4" x 8" sheets, are not suitable as a subfloor. Structurally, they lack the strength and height needed for a hardwood flooring installation.
Can I paint particle board flooring? ›While an unusual solution, you can cover your particle board subfloor with a coat of paint to improve its appearance. It takes time and work to prepare the particle board for paint, but it is a project that anyone can do, and is much less expensive than any other type of floor decoration.
What does tongue Colour indicate? ›A pink tongue is healthy and normal. A red tongue may indicate heat in the body like a fever or a hormonal imbalance. A reddish purple tongue is a sign that there may be inflammation or an infection in the body. A pale pink tongue may be a sign of a vitamin deficiency, a weak immune system or a lack of energy.
What does green coating on tongue mean? ›Oral thrush
It's caused by an overgrowth of fungus naturally found in the mouth. This fungal overgrowth looks white, but can turn green over time as the infection sets in. Other symptoms of oral thrush include: white bumps on the tongue or tonsils.
STRUCTAflor® BLUETongue® 25mm particle board flooring is used for interior substrates in residential homes. This sheeting is protected against termites. STRUCTAflor® BLUETongue® 25mm particle board is the perfect foundation for general purpose flooring finishes. It is a strong and robust timber product.
What is the best paint for particle board? ›The best type of paint for particle board cabinets is an oil-based enamel paint. The higher the gloss a paint sheen is, the easier it is to clean. Most people don't like high-gloss cabinets, so we typically use a semi-gloss or satin sheen.
What kind of flooring can you put on particle board? ›Particle Board: Only Suitable for Carpet or Floating Floors
This type of product is not a structural sub-floor material and therefore can not be used with any flooring types that require fastening with either glue or nails. Particle board is only suitable as an underlayment for carpet or a floating floor.
What can I cover particle board with? ›
Particleboard is soft and will soak up lots of stain, but once it's covered it will look like nothing you've ever seen. After the stain is dry, cover it with two coats of clear varnish, shellac, polyurethane or lacquer.
Can you lay vinyl planks on yellow tongue? ›Vinyl's biggest disadvantage is when it comes to yellow tongue floors (top floor of a 2 storey home), you will need to put Masonite down first unless you use Karndean, as most manufacturers will not warrant their product.
Can you epoxy over yellow tongue flooring? ›Where can Epoxy floors be used? Epoxy floors can be delivered over any structurally sound surface, including raw concrete, tile, gyprock, yellow tongue. Raw floor boards are not suitable as they can move and cause the Epoxy to crack.
Can you screw into yellow tongue? ›yellow tongue is put down with liguid nails or similar and 75mm nails .. usually with a nail gun at about 200mm centres on each joist..a few screws will help with squeaks.
Do you glue yellow tongue and groove flooring? ›You need glue as well as either top nail or secret nail, maxbond is what we use. The advice you were given is correct, if you just secret nail the boards down you can get creaking noises between the new floor and the yellow tongue, the glue will stop any movement between the two.
Can I paint yellow tongue flooring? ›As mentioned earlier, our sub-floor was particle board (yellow tongue). This accepts most regular paints.
Which way does chipboard flooring go? ›Boards are laid lengthways across the joists and 'printed side' up. Loose lay the first board so that its grooved side is towards the wall. Align it so that it is square with the joists and leave a 10mm gap along the wall edge to allow for expansion.
How much does a 4x8 sheet of 3/4 Particleboard weight? ›Particle board is non-structural and very heavy about 90 pounds a sheet.
What size sheets does particle board come in? ›Particle board comes in 4-foot-by-8-foot panels; 1/2-inch- to 1-inch-thick pre-cut shelving boards come in various sizes.
Should I remove particleboard underlayment? ›If your time and budget allow, I would remove all the particle board subflooring and replace it with plywood. But if you feel the undamaged particle board will remain in good condition, you would only have to tear out the areas that need replacing.
Is green tongue flooring termite resistant? ›
Green Tongue (T&G) Termite Treated Particleboard Flooring provides unbeatable protection against damp or humid conditions. It's made to flawlessly high standards and features an easy to use tongue and groove system for remarkable strength in unsupported joints.
Is red tongue flooring termite resistant? ›Is red tongue flooring termite resistant? Yes, usually all the particle floorboards are termite resistant.
Is yellow tongue flooring treated? ›STRUCTAflor® YELLOWTongue® 19mm Particle Board Flooring Termite Treated | Bowens. STRUCTAflor® YELLOWTongue® 19mm particle board is the ideal foundation for all purpose flooring finishes. It is a resilient and durable timber product. This particle board sheeting is made using naturally grown, renewable plantation pine.
How do you prevent yellow tongue? ›- Quit smoking. ...
- Brush your teeth twice a day and floss your teeth at least once daily.
- Use a tongue scraper to gently remove dead cells, food, and other debris from your tongue.
- Increase the amount of fiber in your diet, which will reduce the number of bacteria in your mouth.
Trade Essentials® Particleboard Flooring is capable of withstanding general weathering for up to 3 months. Less exposure however, is recommended. To maintain best practice, packs of Particleboard Flooring should be protected from the weather before installation.
What size is yellow tongue flooring? ›Yellow Tongue flooring is a structural-grade particleboard sheet for interior use in domestic buildings. Sheets are 3600 x 800 x 19mm with a Tongue and Groove. Note: Yellow tongue was made at a width of 900mm originally, but changed to 800mm in late 2019.
Why is yellow tongue now 800 wide? ›It is particularly suited to platform construction (where the floor is laid prior to the erection of walls) as well as fitted floor construction. As a part of their continual improvement, Borg Manufacturing have now changed their sheet sizing from 900mm wide to 800mm wide for 19mm YELLOWtongue.
What is yellow ton? ›Yellow tongue usually occurs as a result of a harmless buildup of dead skin cells on the tiny projections (papillae) on the surface of your tongue. Most commonly this occurs when your papillae become enlarged and bacteria in your mouth produce colored pigments.
What is Platform sheet flooring? ›Introduction. A platform floor provides a working platform for the builder as the floor is laid before erecting the wall and roof framing. However, this method is not recommended for feature floors because the flooring is exposed to the weather during construction.
Can you put particle board on concrete? ›Even when construction projects are all stone, masonry or concrete, particleboard is used. On even the biggest jobs, particleboard forms are build from 1-inch particleboard. Concrete is poured into the forms to harden.
Can I use PVA to seal chipboard? ›
If its the white you could use waterproof PVA let down 25% water 75% PVA. Or a cheap wood primer. For the green chipboard PVA let down 25 - 50% with water. As has been said apply with a roller, one of the cheap one for gloss paint will do.
What is the best board for flooring? ›Best for Durability and Maintenance: Plywood
But plywood is a somewhat stronger material that performs better under very heavy flooring, such as ceramic or stone tile.
Particleboard is very porous, so it is relatively easy to stain. However, you need to pay attention to the staining process due to the composition. When looking at a raw piece of furniture built with particleboard, the first step is to seal the piece, says DoItYourself.
Can you vinyl over particle board? ›While particleboard is actually only recommended for vinyl sheeting, vinyl tiles can be installed on it, provided the particleboard is sealed first. This prevents moisture from seeping between the tiles and causing the particleboard to swell over time.
Can you tile over particle board? ›The manufacturers of particleboard flooring do not recommend tiling directly onto their products. These flooring products are coated with a protective coating to prevent moisture ingress. These coatings can interfere with bonding to the substrate. They can also contain waxes, which can also interfere with adhesion.
How can I make my chipboard floor look good? ›If you do have floors made of chipboard, however, you can protect and improve them by painting them. The best floor paint for chipboard is a glossy floor paint over a good-quality primer.
What is yellow tongue flooring used for? ›Yellow tongue flooring is structural grade particleboard sheet flooring for interior use in domestic and residential buildings, particularly suited to platform construction where the floor is laid prior to the erection of walls.
Can red tongue Flooring get wet? ›The only difference between red and yellow tongue is the thickness. Neither are waterproof. Particleboards should never be use in wet areas.
What is yellow tongue used for? ›STRUCTAflor General Purpose is structural grade particleboard sheet flooring for use in residential & commercial buildings. It is particularly suited to platform construction (where the floor is laid prior to the erection of walls) as well as fitted floor construction.
What side is yellow on tongue? ›Yellow tongue has a raw side and a greasy side. Floor is glued to the raw side. Greasy side faces substrate as the wax helps prevent moisture entering the yellow tongue.
Can you sand yellow tongue flooring? ›
The yellow tongue comes with a waxy coating designed to protect it from weather prior to the roof being put on a dwelling. This will repeal any stain or coating, and you'll need to sand the flooring before staining.
How thick is particleboard flooring? ›Particleboard panels are manufactured to a precision thickness of +/- 0.015 inch, and provide a level base and even joints for floor coverings. They also resist impact of denting, yet are resilient and comfortable underfoot.
Can you paint yellow tongue flooring? ›As mentioned earlier, our sub-floor was particle board (yellow tongue). This accepts most regular paints.
How long does yellow tongue last in the weather? ›Due to some problems we have had in our project, and our life, it looks like I am going to have some yellow tongue particle board exposed to the weather for about 3.5-4 months. All the manufacturer's material and the Australian Standard states that this particle board can be exposed for upto 3 months.
Can you use yellow tongue flooring in bathrooms? ›Bathrooms, toilet, laundries and even kitchens need to have the floor fully waterproofed and you can't 'seal' or waterproof directly onto Yellow Tongue & Groove flooring. Using this material is illegal and frowned upon within the industry.
Can particle board get rained on? ›When particleboard gets wet, it can swell or even disintegrate. Manufacturers use particleboard because it is less expensive than plywood. Unless the water damage is significant, particleboard can be repaired after getting wet.
Can you lay vinyl planks on yellow tongue? ›Vinyl's biggest disadvantage is when it comes to yellow tongue floors (top floor of a 2 storey home), you will need to put Masonite down first unless you use Karndean, as most manufacturers will not warrant their product.
How thick is yellow tongue flooring? ›STRUCTAflor has unique colour-coded tongues to identify thickness; YELLOWtongue - 19mm for joist centres up to 450mm. REDtongue - 22mm for joist centres up to 600mm.
How can I clean my yellow tongue? ›Medical treatment for yellow tongue usually isn't necessary. If tongue discoloration bothers you, try gently brushing your tongue with a solution that is 1 part hydrogen peroxide and 5 parts water once a day. Rinse your mouth with water afterward several times.
What size is yellow tongue flooring? ›Yellow Tongue flooring is a structural-grade particleboard sheet for interior use in domestic buildings. Sheets are 3600 x 800 x 19mm with a Tongue and Groove. Note: Yellow tongue was made at a width of 900mm originally, but changed to 800mm in late 2019.
Why is my tongue yellow green? ›
Oral thrush
It's caused by an overgrowth of fungus naturally found in the mouth. This fungal overgrowth looks white, but can turn green over time as the infection sets in. Other symptoms of oral thrush include: white bumps on the tongue or tonsils.
Coffee and tea can also easily stain elongated papillae, especially if you drink a lot of either of them. Some mouthwashes. Certain harsh mouthwashes that contain oxidizing agents, such as peroxide, can affect the balance of bacteria in your mouth.