RC cantilever retaining wall
L-shaped or T-shaped cast-in-place wall with footing and stem — common for villa driveways and pool terraces.
Retaining · Slope · Drainage
Retaining Wall Services in Koh Samui | Samui Fixit (CHK)
Retaining wall services on Koh Samui — RC, block walls, drainage and slope repair. Site survey, BOQ and QT from CHK / Samui Fixit.
Retaining wall solutions
Filter by wall type — soil load, height and access (flat vs mountain) are confirmed in the QT after site survey.
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Thick RC gravity wall
Mass concrete wall relying on self-weight — suitable for moderate heights on stable cut slopes.
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Counterfort / buttress wall
Vertical ribs on the soil side for tall retaining — engineered for higher soil pressure on steep plots.
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Reinforced CMU block wall
Concrete blocks with vertical and horizontal rebar, filled cores and grout — cost-effective for garden tiers.
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Segmental / interlocking block
Dry-stack or mortar-set segmental units with geogrid when specified — fast install on accessible slopes.
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Gabion basket wall
Wire cages filled with stone for erosion control and rustic finishes — drainage-friendly on cut slopes.
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Weep holes & sub-drain
PVC weep pipes, gravel blanket and agricultural drain behind the wall — critical in Samui monsoon rain.
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Back-face waterproofing
Bitumen, crystalline or membrane on the soil face before backfill — extends wall life on wet hillsides.
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Repair bulging or cracked wall
Assess failed drainage or overload — inject, stitch cracks or rebuild sections before total collapse.
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Raise or extend existing wall
Tie new stem to old footing — check capacity before adding height for extra terrace or parking level.
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Hillside villa access walls
Retaining along steep driveways and cut-and-fill plots — coordinate with road levels and guardrails.
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Site survey & soil check
Measure height, slope, access and existing drainage — photos and BOQ before QT.
Photos and durations are typical examples. Soil report, geotechnical advice and height limits are documented in the QT before work starts.
How we help
Survey & design input
- Measure retained height, soil type, groundwater and vehicle loads on top of the wall.
- Flat vs mountain pricing and material ferry costs explained on the first visit.
- Agree wall type, drainage detail and finish before QT (VAT 7%).
- 50% deposit typical for jobs over ฿10,000 — cash on site up to ฿2,000 for small works.
Excavation & structure
- Cut and bench the slope safely — shoring or phased dig when access is tight.
- Set rebar, formwork and pour footings and stem to drawing — cube tests when required.
- Install weep holes and drainage blanket before backfill begins.
- Materials ferried from Chumphon HQ when not stocked locally on island.
Backfill, finish & drainage
- Layered backfill with compaction — geotextile separation when specified.
- Plaster, paint or stone cladding on exposed faces to match villa design.
- Tie into surface drains and culverts so monsoon rain does not overload the wall.
- Daily LINE updates with photos for remote owners and property managers.
Koh Samui delivery
- CHK / Samui Fixit — retaining walls plus concrete walls, construction and guardrails from one company.
- Experience with steep villa plots, resort cut slopes and landslip repairs across the island.
- Formal handover with snag list; warranty starts after full payment per CHK policy.
- Formal QT numbering (QTyyyymmXXXX) with written scope before work starts.
Plan your retaining wall on Koh Samui
Send slope photos, retained height and access — we reply on LINE with survey slots and a BOQ / QT outline.