What crack Injection covers
Crack injection fills a crack through the full thickness of a concrete or masonry element using resin under pressure. It seals water paths that surface repairs cannot reach, but it should follow an assessment of why the crack formed, because an actively moving crack needs a flexible resin or a different approach entirely.
Crack injection fills a crack through the full thickness of a concrete or masonry element using resin under pressure. It seals water paths that surface repairs cannot reach, but it should follow an assessment of why the crack formed, because an actively moving crack needs a flexible resin or a different approach entirely.
Filling a leaking crack through its full depth with resin, once the movement behind it is understood.
Waystar carries out this work on residential and commercial property in Brooklyn and across New York City. Every project starts with a look at the building, and the scope, the materials and the figures are written down before anything begins.
When might you need it?
These are the signs owners usually notice first.
- A crack in a foundation or retaining wall that weeps water
- A surface patch over a crack that has already failed
- Water tracking through a wall along a visible line
- A crack that reappears after being filled from the face
- Damp entering below ground through a single defined route
What the work involves
- Assessment of the crack, its pattern and whether it is still moving
- Judgement on whether structural advice is needed first
- Crack cleaned and ports set at calculated spacing
- Surface sealed between the ports to contain pressure
- Resin injected until it refuses across the full depth
- Ports removed and the surface made good
How the process works
Read the crack
Its pattern, width and whether it is still moving decide the material and sometimes the whole approach.
Set ports and seal the face
Spacing and surface sealing are what let the resin travel rather than escape.
Inject to refusal
Resin is pumped until the crack will take no more, which confirms full depth fill.
Make good
Ports come out and the surface is finished.
What you get
- A seal through the wall rather than a cosmetic surface fill
- Resin selected for whether the crack still moves
- A repair that does not reopen the first time the wall moves
What affects the scope
- Wall thickness and how far the resin must travel
- Whether the crack is dormant or still moving
- Access to one face or both
- The number and total length of cracks
This is a preliminary planning range, not a quote. A property visit is required before any price is confirmed.
Frequently asked questions
Does injection fix the structural problem?
No. It seals the water path. If the crack is caused by movement or settlement, that is a separate structural question and often an engineering one.
Which resin is used?
Polyurethane where water is active and some movement is expected, epoxy where the crack is dormant and bonding matters. The crack decides.
Can I just fill it from the surface?
You can, and it usually fails, because the water path runs through the wall rather than along its face.
Services often needed alongside this
This service is part of Waterproofing.
Related work
