Floor Sourcing Services
Home ASK Us Problems Solves Outdoor Bamboo Decking Cupping

Outdoor Bamboo Decking Cupping

Have A Question?
  • Problems Solves Detail

Exposed to moisture for an extended period of time, bamboo flooring products can absorb moisture and weaken. Because bamboo is grass, the grain runs the length of the board. Inferior or inappropriate bamboo selection, the use of bamboo that is either harvested too young or not properly dried can be prone to changes in temperature and humidity. This can lead to cupping, warping and swelling of the material.


Reason 


1. Uneven distribution of floor moisture content


2. The floor is slotted on one side and not slotted on the other. The two sides of the floor are not the same as the air contact area, and the degree of water absorption is different, resulting in different moisture content on both sides of the floor.

In the case of high air humidity, there is less water in the air without the slotting side, and the side of the back slot absorbs more water in the air, expanding the face surface of the back slot, but the surface of the plane does not expand, so the floor will bend like that of the plane.

In the case of air drying, on the contrary, the board will bend like a slotted side.

warp flooringwarp board

Solutions

1. In production:

When health balance, drying should not be too fast, drying kiln to keep the temperature uniform;

Try to make sure that both sides of the floor have the same texture

2. How to avoid before installation

Proper expansion joints reserved for paving

3. After installation

Because the weather humidity changes with the season, you can see if the floor will recover in a few months. If it is still tile, you can only replace the floor

A free consultation

We focus on floor inspections only, we try to help you to solve all the questions in flooring line.

Related Products

Lifting Edges on hardwood Lifting Edges on hardwood

Buckling And Cupping On Flooring

What caused Buckling and Cupping on flooring, and how to deal with it?

Flooring Cracking Flooring Cracking

Cracks On The Surface Of Solid Wood Flooring

Main Reasons And Solve Measures For Creak/ Split/ Break/ Fissure Problems On The Flooring.

Mold and Mildew Flooring Mold and Mildew Flooring

Mildew/Mold On Flooring

How to prevent, control, or repair mold/mildew floor?

What Causes a Creaking & Popping Noise in Floors What Causes a Creaking & Popping Noise in Floors

Creaky Floor, Popping Noise Floor, Squeaky Floor

How to deal with LOOSE, NOISY, and SQUEAKY FLOOR?

Dip Peel Test on Engineered Strand Woven Bamboo Dip Peel Test on Engineered Strand Woven Bamboo

Dip Peel Test on Engineered Strand Woven Bamboo

Date: Dec. 23, 2017 Location: Zhejiang Province, China Inspection  sample: Engineered strand woven bamboo flooring with HDF core material Sample size (LxWxT): 75x75x14mm Test condition: Boiling in water under 100°C for 6 hours

EU oak grade standard EU oak grade standard

EU oak grade standard

No. Item A grade B grade C grade D grade E grade 01 Grain Regular straight grain, mountain grain Regular straight grain, mountain grain, half straight grain  Straight grain, mountain grain, half straight grain  Straight grain, mountain grain, messy grain No limited 02 Live knots φ≤8mm, 2pcs, color natural φ≤15mm, 2-5pcs, color natural φ≤60mm, spitting, color closely Allowed, width≤ 1/3 width of flooring Allowed, width≤ 1/3 width of flooring 03 Dead knots Not allowed φ≤5mm, 1-2pcs, spitting, color closely φ≤20mm, 1-3pcs, spitting, color closely φ≤40mm, 2-4pcs, spitting, color closely φ≤60mm, spitting, color closely 04 Pin knots Single spitting, overall color closely Small, spitting, color closely allowed Spitting, color closely allowed Spitting, color closely allowed Spitting, color closely allowed 05 Side knots Not allowed Not allowed Allowed no drop, no cracking, not allowed dead knots Allowed no drop, no cracking, not allowed dead knots Allowed no drop, no cracking, not allowed dead knots 06 Holes Not allowed φ≤1mm, 3-5pcs, spitting, not color changed φ≤1mm, spitting, not color changed φ≤1mm, spitting, not color changed φ≤1mm, spitting, not color changed 07 Black Lines Not allowed Not allowed 1*100mm, 1-3lines, spitting 3*200mm, 3-5lines, spittng 3*200mm, 3-5lines, spittng 08 Pollution if the surface can be sanded allowed, oil not allowed if the surface can be sanded allowed, oil not allowed if the surface can be sanded allowed, oil not allowed if the surface can be sanded allowed, oil not allowed if the surface can be sanded allowed, oil not allowed 09 Splits Not allowed Not allowed 3*300mm, 1-2lines, seams not allowed 5*300mm, 1-2lines, seams not allowed 8*600mm, 1-3lines, seams not allowed 10 End Oxidation Not allowed Not allowed Allowed a slight, but the color closely Allowed color closely, but the width≤1/4 of flooring width, sq.m≤5% Allowed color closely, but the width≤1/4 of flooring width, sq.m≤5% 11 Sub wood Not allowed Allowed a slight     Allow only one side, the width≤15% of flooring width Allow only one side, the width≤20% of flooring width Allow only one side, the width≤30% of flooring width 12 color difference Not allowed Allowed a slight Coordination allowed Coordination allowed Coordination allowed 13 Discoloration Not allowed Not allowed Allowed slight natural discoloration, not allowed blue/yellow stained fungus Allowed slight natural discoloration, not allowed blue/yellow stained fungus Allowed slight natural discoloration, not allowed blue/yellow stained fungus 14 Bark Pocket Not allowed Not allowed 2*30mm, 1 line 4*40mm, 3 lines 5*60mm, 3 lines 15 Watermark, spacer mark Not allowed Not allowed Not allowed Not allowed Not allowed 16 Decay Not allowed Not allowed Not allowed Not allowed Not allowed 17 Broken grain Not allowed Not allowed Not allowed Not allowed Not allowed 18 Tabby grain Not allowed Not allowed Allowed strip, not allowed flake Allowed strip, not allowed flake Allowed strip, not allowed flake Usually is ABCD Grade, 15-20% AB grade, 80-85% CD grade; If the grade is ABCDE, should have 20% C grade. 

bamboo walls construction bamboo walls construction

Carved and Acoustical Bamboo Wall Panels

Groove acoustic panel is the common sound absorption materials in modern buildings. The structure of groove in surface and perforation in back is base on scientific calculation and acoustic theories. The panel has excellent noise reduction and sound absorption performance, especially for medium and low frequencies.         

SPC qualified standards, quality control check list SPC qualified standards, quality control check list

SPC qualified standards, quality control check list

1.  Appearance & Quality Requirements Defects Items Standard Defects, fissures, wrinkles, holes Not allowed (a)Offset printing, delamination, peeling Not allowed (b)Spots, bubbles, scratches, discoloration etc. Not obviously (a) is suitable for heterogeneous floor (b) can be agreed according to the contract between the supplier and the buyer   Item Superior product Qualified product Frosting mark and water mark Not allowed  ≥ 3% the area of the board Scratches Not allowed Press mark Not allowed Previous spots of impregnated paper Not allowed Gloss unevenness Not allowed  ≥ 3% the area of the board Spots,dirt and similar surface defects Not allowed ≤ 10mm², 每米长允许一个allowable 1pc/m Blister Not allowed Bubble Not allowed Tearing of impregnated paper Not allowed Bare substrate spots due to defective surface covering Not allowed Fissure on the surface Not allowed Delamination Not allowed Tongue and corner deformity Not allowed   2. Size And Deviation Length  ≤ 0.1% of length Width ≤ 0.2mm, the difference between the maximum and minimum values ≤0.1 mm mm +0.13mm to -0.10mm,最大值与最小值绝对值不超过(maximum variation)≤0.1mm Straight Angle qmax≤0.20mm straightness smax≤0.20mm Height difference average value ≤ 0.10mm, Hmax ≤ 0.15mm Gap average value≤ 0.07 mm, Gmax ≤0.1 mm Model of click 应与确认的钢模相同should be the same as the confirmed steel model   3. Physical And Chemical Performance Requirements Gloss matte (3~10)±2° semi-matte (15~25)±2° glossy 25以上(more than 25)±2° Tensile Strenght 5cm/120N: 4.0mm≥100N 5.0mm≥120N Ply Adhesion 60N/5cm Curl after 6hrs at 80℃ Laboratory Oven for 6hrs&80℃ then measure with a Vernier: ≤1mm Dimensional Stability Laboratory Oven for 6hrs&80℃ then measure with a Vernier:≤0.1% Dimensional changes after heating WPC 65℃≤0.2%,SPC 80℃≤0.1% abrasion resistance  ≥0.015g/1000转(r) Abrasion resistance Paint film scriber ≥4B Surface scratch resistance Surface decorative pattern is not scratched under 4.0N's force. Indentation ≤0.05mm Formaldehyde release  No Formaldehyde Bibulous rate ≤3%     Packing Product Mark Before the products are stored, they should be tagged in proper parts with their product models, trademarks, production dates, etc.   Packing Mark The standard codes , factory name, address, product name, production date, trademarks, specifications, formaldehyde release sign, type, grade, quantity, etc.   Package A product shall be packed based on its category, specification and grade. The enterprises shall provide detailed instruction books and manuals according to the characteristics of a product. The package shall protect products from being hit,scratched or stained. Packing requirements shall only be settled after negotiation between two parties.

OUR

NEWSLETTER

   

A free consultation

We focus on floor inspections only, we try to help you to solve all the questions in flooring line.