Crack Repair · UAE waterproofing service
Crack Repair That Holds Through Thermal Movement
We deliver crack repair for property owners and facility teams who need lasting protection in UAE heat, UV and seasonal rain — not a quick coat that fails in two summers. Looking for crack repair in Dubai or across the Emirates? We inspect first, then specify a system matched to UAE heat, UV and how the surface is used.
Cracks in UAE concrete and masonry result from shrinkage, settlement, thermal movement, or structural overload — and each type needs different repair, not generic filler. Before injecting or sealing, decide if the crack is active or dormant, wet or dry, and structural or cosmetic. Waterproofing failures often start at unsealed cracks that propagate through screed and membrane. Injection with epoxy, polyurethane, or cementitious grout depends on movement and water presence. This guide helps you choose repair logic before cosmetic cover hides a moving joint.
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Inspection-led scope
Diagnose before quoting
Written warranties
Terms on major systems
UAE-ready systems
Heat, UV and rain
All seven emirates
Villas to warehouses
Questions about coverage? See our warranty terms and process.
Results
What changes after a proper system
Representative before/after stages — real project photos available during quoting.
Failed or ageing crack repair detail — ponding, cracks or active tracking
Prepared substrate with continuous crack repair membrane and dressed details
What is crack repair?
Crack repair in waterproofing terms means sealing cracks in concrete and masonry that act as direct water paths — using epoxy injection for structural cracks that need strength restoration, and flexible polyurethane grout for active or moving leaks. Surface filler alone fails when slabs expand in UAE heat. Proper scope includes crack classification, width monitoring where needed, injection port spacing and compatible surface seal over the repaired zone.
Why UAE buildings need it
UAE concrete slabs and raft foundations move daily through extreme temperature swings. Shrinkage cracks appear in the first years of a building's life; structural cracks follow settlement or overload. Active leaks through cracks are common in podiums, basements, pools and roof slabs. Contractors fill cracks with rigid mortar that opens again the next summer. Injection with the wrong resin — rigid epoxy on a moving joint — wastes time and money.
Quick answers
What property owners ask first
Direct answers written for search and AI assistants — then read the full sections below for detail.
What is crack repair for waterproofing?
Crack repair seals concrete and masonry cracks that leak water — using epoxy injection for structural cracks and flexible polyurethane for moving active leaks. It goes deeper than surface filler to address the full crack path. It is selected after crack type and movement are assessed.
Why is crack repair needed in the UAE?
UAE heat moves slabs daily, opening shrinkage and structural cracks. Rain and groundwater follow these paths directly. Surface filler fails in one season. Wrong injection resin fails on moving joints. Proper crack repair stops leaks at the path before coating entire areas.
How much does crack repair cost in the UAE?
Price depends on crack length, accessibility, active leak status, resin type and whether monitoring is needed. A single leaking crack differs from a programmed basement joint treatment. Quotes vary; site inspection is required.
How long does crack repair last?
Properly injected structural cracks often perform 10–20 years. Flexible PU on moving joints needs periodic inspection. Surface filler alone may fail in months. Combined injection and surface system gives the longest result in UAE thermal conditions.
The problem we solve
Structural and shrinkage cracks act as direct water paths. Surface filler without injection fails when the slab moves in UAE heat.
- Shrinkage cracks in villa roof and terrace slabs leaking in rain
- Structural cracks at column and beam junctions with active seepage
- Cold joint leaks in basement and tank walls
- Previous surface filler failed after one heat cycle
- Cracks at pool shell and tank floor-wall junctions
- Epoxy injection on moving cracks without flexibility allowance
- Cracks masked by paint while water continues through slab
Our solution
Epoxy injection for structural cracks, polyurethane injection for active leaks, and compatible surface sealing.
Signs you need crack repair work
- • Visible crack with water seepage during or after rain
- • Rust staining along a crack line on ceiling or wall
- • Crack width changes seasonally — suggesting movement
- • Previous filler popped out or cracked again
- • Leak stops when dry but returns every rain event
- • Engineer flagged cracks requiring classification before coating
Methods
Crack Repair methods we specify
The right system depends on substrate, exposure and how the area is used — not a one-product pitch.
Epoxy injection for structural cracks
Low-viscosity epoxy under pressure to restore monolithic action in structural members — not for actively moving joints.
Polyurethane injection for active leaks
Hydrophilic or hydrophobic PU grout that flexes and reacts with water — stops active leaks in moving cracks.
Surface seal and flexible overband
Compatible sealant and membrane strip over injected cracks as secondary line of defence.
Crack monitoring before repair
Tell-tale gauges on suspect structural cracks to confirm movement class before resin selection.
Outcomes
Benefits
- Inspection before quoting — no guesswork on scope
- Materials matched to crack repair exposure and substrate
- Reinforced details at drains, corners and penetrations
- Written warranty on major system installations
- Documentation for FM, insurers and handover packs
Expected lifespan in the UAE
Correctly classified and injected structural cracks often perform 10–20 years without re-leak. Flexible polyurethane on moving joints may need inspection every 5–7 years if movement continues. Surface filler alone typically fails within one UAE summer. Combined injection plus surface system gives best durability.
Materials we use
- Epoxy injection resins
- Hydrophilic polyurethane grout
- Surface sealers and mortars
See also our materials overview and warranty terms.
Professional installation process
- 01
Site inspection
We map moisture paths, substrate condition, drains and penetrations before quoting.
- 02
Surface preparation
Failed coatings are removed, cracks repaired and surfaces primed to manufacturer spec.
- 03
Detail reinforcement
Corners, outlets, pipes and movement joints receive extra membrane layers.
- 04
System application
The specified membrane or coating is applied at correct thickness with cure controls.
- 05
Testing and handover
Flood or hose tests where applicable, photos, warranty documents and maintenance guidance.
Full methodology on our process page.
Cost factors
- • Accessible area and working height
- • Strip-out of failed layers
- • System type and thickness
- • Detail complexity
- • Warranty scope
Crack repair priced by linear metre, width class, and access — ceiling soffit work costs more than ground floor. Structural injection with epoxy resin costs more than flexible PU for wet leaks. Engineer fees separate for structural classification. Bulk pricing on warehouse floors differs from detailed facade stitch repair. Inspection classifies crack type before per-metre quotes apply.
Read our waterproofing cost guide.
Maintenance advice
- • Annual visual inspection
- • Keep drains clear of debris
- • Repair minor damage before it spreads
- • Follow warranty inspection schedule
Reinspect repaired cracks seasonally — movement returns if root cause unsettled. Monitor adjacent areas for new branches from same origin. Keep load off slabs with fresh injection until cure complete.
Expert tips
- • Do not tile or paint over damp substrates
- • Compare quotes by written scope not headline price
- • Photograph the area before and after works
- • Fix root cause — settlement, overload, or missing joint — not just crack
- • Use flexible seal at slab-to-wall interfaces with movement
- • Combine injection with surface band for dual protection
- • Do not tile until crack activity proven dormant
- • Map all cracks on floor before epoxy flooring install
- • Keep injection ports accessible on basements until verified
Industry best practices
Measure crack width over time — tell-tale gauges or dated photos show activity. Structural cracks wider than code limits need engineer assessment before injection cosmetic fix. Dry static cracks suit low-viscosity epoxy for strength; wet moving cracks need hydrophilic or flexible polyurethane. Chase, clean, and seal surface to full depth — skin-deep filler fails. At waterproofing interfaces, integrate crack repair with membrane overlay per system manual. Do not grind structural columns without engineer approval.
When to call a specialist
Call when cracks weep water, widen after rain, or appear after new loading. Before tiling over cracked screed. If crack runs through waterproofed zone, integrate with membrane specialist not handyman filler.
Aftercare in the first weeks
Protect injected zones from vibration 24 to 48 hours. Do not seal surface paint until injection cure confirmed. Monitor for new water tracks adjacent to repair.
Patch, partial, or full system?
Can crack injection stand alone, or is broader waterproofing still required?
Patch when
Injection alone works for isolated structural or shrinkage cracks when surrounding membrane or concrete is sound and water stops after curing. Monitor through the next rain cycle.
Full system when
Combine with membrane or tanking when cracks are symptoms of broader seepage, movement joints failed, or multiple cracks appear after each season. Injection is a tool, not a whole-roof substitute.
Avoid
Do not inject and walk away without documenting crack width, product and monitoring. Without records, the next contractor will reopen the same line.
Injection is a precision tool for isolated cracks, not a substitute for failed roof or basement membranes. Document product, crack width and monitoring after the next rain. If new cracks appear nearby each season, step back to structural or membrane diagnosis instead of endless point repairs. Keep injection records with FM files so the next contractor does not re-drill blindly. Live cracks that reopen after injection usually signal movement or ongoing pressure — pause and reassess rather than injecting the same line a third time.
Options compared
| Option | Best for | Watch out |
|---|---|---|
| Epoxy injection | Dry structural cracks needing strength restoration | Rigid — may reopen if movement continues |
| Polyurethane injection | Active water ingress through moving cracks | Not structural reinforcement — movement may persist |
| Surface sealant and band | Hairline non-structural facade crazing | Masks active cracks below — monitor regularly |
| Stitching or carbon fiber | Structural slabs and beams per engineer spec | Higher cost; requires certified structural contractor |
Owner checklist
- Measure and photograph crack at multiple dates if possible
- Determine wet vs dry and static vs moving
- Obtain engineer review if width or pattern concerns
- Select injection resin matched to crack behaviour
- Prepare chase depth per manufacturer — not surface only
- Integrate with waterproofing membrane if in wet zone
- Document repair location on plan for FM
- Verify substrate dry enough for epoxy if specified
- Schedule follow-up inspection after first rain
Common mistakes to avoid
These errors shorten membrane life and turn small leaks into slab or ceiling repairs.
- Using rigid mortar on thermally moving slab cracks
- Injecting epoxy into actively leaking moving cracks
- Skipping structural assessment on wide or progressing cracks
- Injecting one crack while water enters at adjacent cold joint
- Coating over cracks without injection on positive-pressure faces
- Wrong port spacing leading to voids in injection chain
Why choose our crack repair service
- Crack classification before resin selection — not one product for all
- Structural vs leak-sealing approach explained in plain language
- Experience on podiums, tanks, pools and roof slabs
- Coordination with structural engineers when widths exceed limits
- Injection followed by compatible surface waterproofing where needed
Frequently asked questions
Additional detail beyond the quick answers above. Still unsure? Request an inspection.
How long does crack repair take?
Timelines depend on area, prep needs and cure times. A typical villa bathroom may take 3–5 days including flood test; a full roof refurbishment can take 1–3 weeks.
Do you provide warranty on crack repair work?
Yes — major system installations include written warranty terms. Scope and exclusions are stated in your quote.
Which emirates do you cover for crack repair?
We serve Dubai, Abu Dhabi, Sharjah and all northern emirates. Remote industrial sites are scheduled by arrangement.
Is my crack structural or shrinkage?
Width, location, progression and engineer review determine classification. We recommend structural input on cracks above typical shrinkage limits.
Can cracks be repaired without stopping an active leak?
Polyurethane injection is designed for active water — epoxy usually requires dry conditions. Method follows leak status.
Should I inject or waterproof the whole slab?
Localised injection suits defined crack paths; widespread cracking or failed membranes need broader system repair. We advise after inspection.
Are all concrete cracks dangerous?
Many shrinkage cracks are cosmetic if dormant and dry. Pattern, width, location, and activity determine risk. Engineer review advised for supporting elements, widening cracks, or any crack with water.
Can cracked balcony slab be fixed without replacement?
Often yes with injection and waterproof membrane if engineer confirms structural adequacy. Cantilever root cracks need special attention — cosmetic seal alone fails.
How long does crack injection last?
Durable if crack is dormant and root cause resolved. Active settlement or missing expansion joints cause reopening. Warranty should state assumptions about structural stability.
How do I know injection worked?
Monitor through the next rain or controlled wetting cycle and keep photos of the treated line. If damp returns immediately at the same crack, reassess movement or pressure instead of repeating blindly. File product name and crack width with FM records for the next contractor.
Can injection fix a whole leaking basement?
Rarely on its own. Injection suits isolated cracks. Multi-zone seepage, failed joints or landscape drainage problems need broader waterproofing — detection and inspection decide which tier applies before you commit to a basement-wide injection campaign.
Should I inject before or after membrane works on a roof?
Sequence depends on diagnosis. Active cracks feeding a roof leak may need injection as part of prep; systemic membrane failure still needs strip-out or renewal. Do not use injection as a substitute for failed field membrane.
Related services
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Foundation Waterproofing
We deliver foundation waterproofing for property owners and facility teams who need lasting protection in UAE heat, UV and seasonal rain — not a quick coat that fails in two summers.
Ready for professional crack repair waterproofing?
Book a free inspection. We diagnose first, then send a clear written scope — no vague per-sqm promises.