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Roof Leakage

Roof leakage — Chhat leakage, wet ceilings after rain. Show 6 products ↓

  1. Step 1 (completed)Roof leakage
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Problem
Roof leakage
Location
Any
Products
6
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How it happens

How rain gets through a roof

Open the diagram full sizeHow rain gets through a roof: Water stands on the roof after rain when the falls to the outlets are poor. The old waterproofing has aged, cracked or lifted, so it no longer forms a closed skin. Hairline cracks and the roof-to-parapet junction give the water a path through the slab. It shows as damp patches and drips on the ceiling below, often far from where it entered.
Problem Schematic, not to scale

What goes wrong

  1. A: Water stands on the roof after rain when the falls to the outlets are poor.
  2. B: The old waterproofing has aged, cracked or lifted, so it no longer forms a closed skin.
  3. C: Hairline cracks and the roof-to-parapet junction give the water a path through the slab.
  4. D: It shows as damp patches and drips on the ceiling below, often far from where it entered.

How it is fixed

Repair the slab and clear the drains, then apply one seamless, elastic waterproofing layer that is carried up the parapets and reinforced at corners and cracks. The roof guides below give the system, layer by layer.

Products for this problem

Matching products (6)

Sikalastic®-510 PK

Sikalastic®-510 PK

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Why: Sikalastic®-510 PK have following uses: Exposed roof waterproofing, Impervious coating on roofs (flat & sloped) and concrete structures, As protective coating in infrastructure projects. (TDS p.1)

  • Crack-bridging
  • Flexible
  • Water vapor permeable
Surfaces
concrete · tiles/ceramic · existing coatings/membranes
System
Roof Waterproofing
⚠ 2 limitations to check
  • The product can be stained with good quality Stainer for light shades.
  • However, pretest for consistency of colour shade is recommended through site trials before application.
TDS p.2
Data sheet Request a quotation for Sikalastic®-510 PK on WhatsApp

Product facts on these cards are taken from the manufacturer data sheets (page cited on each card) and are being reviewed by our technical team. Always check the data sheet before use.

Step-by-step

Follow a complete solution

Flat roof section with an exposed coating on the slab, turned up and over the parapets and into the drain outlet. Exposed roof waterproofing A liquid-applied membrane that stays open to sun and rain on a flat or sloped concrete roof (chhat). Use it on a new roof once the slab is 28 days old, or to refurbish a leaking roof before the monsoon. 6 steps Roof section: slab, waterproof coat turned up the parapet, sloped screed, then tiles with sealed joints. Roof waterproofing under screed or tiles Waterproofing that is hidden under a protective screed, brick tiles or floor tiles on a flat roof. Use it when you re-do a traditional roof finish or turn the roof into a usable terrace. 6 steps Wall section with roof coating running up the parapet and over the coping, plus a coated sunshade over a window. Parapets, copings and chajjas Parapet walls, copings and chajjas (concrete sunshades and projections) take rain on three sides. Leaks here show up as damp on the walls below, broken edges and rust stains. 5 steps Planter section: waterproof layer, root barrier, drainage layer and soil with plants, draining to a roof outlet. Green roofs, roof gardens and planters Roof gardens, landscaped decks and built-in concrete planters stay wet under soil for years, so the waterproofing must be done before any soil goes in. The data sheets we hold cover bitumen and cement-based layers; ask us about root barriers and dedicated green-roof systems. 5 steps
Recommended system

Complete systems that solve it

6 matching products

Roof Waterproofing

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