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Seam Installation Guide
Free Movement Dance Solutions
Dance Floor Seams & Subfloor Preparation
Before your Marley floor goes in, it helps to understand what a standard installation looks like at the seams and how the condition of your subfloor affects the finished result. This page sets honest expectations.
Standard Installation - No Welding
What Seams Look Like After Installation
When Marley sheets are joined without heat welding, the seam is held together with Marley tape applied along the underside of the joint. The tape bonds both sheets firmly and keeps the seam flat against the subfloor.
Looking at the floor from standing height, the seam is typically a fine, visible line running across the surface - similar to a thin crack in appearance. It sits flush with the rest of the floor and does not protrude above the surface when installed correctly.
Under good lighting, the seam line is noticeable - especially on solid-color mats. It is not invisible, and that is normal. What matters is that the seam is flat, secure, and does not lift or catch footwear during use.
Over time, with regular use and cleaning, the tape bond remains secure provided the subfloor underneath is smooth and level. Any unevenness in the subfloor will cause the seam to behave differently - covered in detail below.
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Important to know: A taped seam is visible. It is not a defect - it is the expected result of a standard non-welded installation. If a completely seamless, invisible finish is required, heat welding is the correct solution.
Seam Appearance in Different Conditions
Three Conditions That Affect How the Seam Looks
The seam's appearance changes depending on subfloor condition, lighting, and how long the floor has been in place.
Condition 01 · Smooth Subfloor
Flat, Flush, Barely Noticeable
On a smooth, level concrete subfloor, the seam lies flat and flush. From standing height it appears as a fine line. It does not lift, ripple, or catch footwear. This is the best-case result.
Condition 02 · Uneven Subfloor
Visible Lift or Slight Ridge at the Seam
Where the subfloor has bumps, dips, or high spots beneath the joint, the seam can appear as a slight raised line or small ripple. The tape still holds but the unevenness below telegraphs through the vinyl surface.
Condition 03 · With Regular Use
Seam May Become More Defined
Heavy foot traffic and repeated cleaning can cause the seam line to become slightly more visible over time. The tape bond remains secure, but the line becomes more defined particularly under raking light.
Subfloor Condition
How Floor Unevenness Affects the Installed Mat
Marley vinyl is thin and flexible - it conforms to whatever surface is beneath it. If your subfloor has irregularities, they will show in the finished floor.
Bumps & High Spots
Small raised areas on the concrete create visible bumps in the mat surface. The vinyl bridges across them, and with foot pressure the high spot telegraphs clearly through the floor. These can be ground down or filled before installation to eliminate the problem entirely.
Dips & Low Spots
Hollows beneath the mat mean the vinyl is unsupported in that area. The floor will feel soft in that spot, and with heavy use the mat may develop a crease or crinkle over the dip. Filling dips with a levelling compound before installation prevents this.
Screw Heads & Fixings
Exposed screw heads, nail heads, or any proud fixings in the subfloor will create small raised dots in the mat surface, and over time with repeated foot pressure can puncture through thin vinyl. All fixings must be countersunk flush before the mat is laid.
Subfloor Join Lines
Where two subfloor panels meet - particularly in wood or plywood subfloors - the joint line telegraphs as a ridge in the Marley surface above it. Filling and feathering subfloor joints before laying eliminates this entirely.
Sloping or Out-of-Level Floors
Floors with a noticeable slope affect how the mat lies and can cause sheets to slowly shift over time even when taped. For significantly out-of-level subfloors, a self-levelling compound should be applied before installation. This is particularly important for dance use where a level surface affects balance and technique.
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Our recommendation: Before any Marley installation, we recommend a subfloor inspection. Addressing unevenness before the mat goes down takes significantly less time and cost than correcting issues after installation. We are happy to assess your subfloor as part of the consultation process - speak to our team before booking.
Singapore Climate
Singapore Weather - What You Need to Know
In a tropical climate like Singapore's, Marley vinyl expands and contracts with changes in temperature and humidity. This is a normal material characteristic - not a defect or installation error.
Subfloor Types · New
Laying Over an Existing Floor - What to Expect
You can lay a Marley dance mat directly over most existing finished floors - vinyl, tiles, timber, and similar surfaces. However, the condition and texture of what's underneath will always show through to some degree.
Vinyl / Homogeneous Tile
One of the better surfaces to lay over. If the existing vinyl is flat and well-bonded, the Marley mat will sit smoothly. Any seam lines or joins in the existing floor may telegraph through thinner mats.
Ceramic or Porcelain Tiles
Grout lines between tiles will show through as a subtle grid pattern on the dance mat surface - especially noticeable on thinner mats (1.3mm–2mm). The deeper or wider the grout, the more visible the pattern will be. Thicker mats (3.5mm and above) bridge the grout lines better.
Timber or Parquet
Individual board edges and joins will telegraph through the mat. Parquet patterns in particular create a visible texture beneath thinner vinyl. The mat will sit flat and be safe to dance on, but the surface will not look perfectly even - the existing floor shows through.
Raised or Uneven Joints
Any raised joint, ridge, or edge in the existing floor will create a bump in the dance mat. With foot pressure and repeated use, these can cause the mat to crease or wear unevenly above that point. Grinding or filling problem areas before laying will significantly improve the result.
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Thinner mats show more: The thinner the mat (particularly 1.3mm–2mm), the more the existing subfloor texture telegraphs through to the dance surface. If you are laying over tiles or textured flooring and want a smoother result, we recommend choosing a thicker Marley mat (3.5mm or above) or laying over a self-levelling compound applied on top of the existing floor first. Speak to our team for advice specific to your space.
Standard vs Heat-Welded
What Changes When You Add Heat Welding
If seam appearance matters for your space, heat welding is the upgrade worth considering. Here is the honest difference between the two approaches.
Standard Installation
Non-Welded - Taped Seam
➖Visible seam line runs across the floor surface
➖Seam can lift slightly over high spots in the subfloor
➖Tape bond may weaken in areas of heavy concentrated use
➖Moisture can penetrate the seam gap over time
➖Seam line becomes more defined with age, traffic, and Singapore's climate
With Heat Welding
Welded - Permanently Fused Seam
✅Seam is permanently fused - no visible gap at the joint
✅Welded rod sits flush with the surrounding surface
✅Structural bond withstands intensive daily use
✅Seam is sealed - moisture cannot penetrate the joint
✅Finish remains consistent over the long term - no widening from climate changes
Questions About Your Floor Installation?
Speak to our team before you book. We can assess your subfloor, advise on the right installation method, and help you get the result you expect - no surprises after the mat goes down.
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