What exterior Wall Waterproofing covers
Exterior wall waterproofing reduces water absorption through a wall face while still allowing the wall to dry outward. That balance matters, because a sealed wall that cannot breathe traps moisture in the masonry and causes more damage than it prevents.
Exterior wall waterproofing reduces water absorption through a wall face while still allowing the wall to dry outward. That balance matters, because a sealed wall that cannot breathe traps moisture in the masonry and causes more damage than it prevents.
Treating walls that have started absorbing water instead of shedding it, without sealing moisture inside.
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.
- Damp patches on interior walls that follow heavy rain
- Brickwork that stays visibly dark for days after wet weather
- White salt bloom appearing on the wall face
- Wind driven rain penetrating on one elevation only
- A previous sealer that made the damp worse rather than better
What the work involves
- Survey of the elevation and the exposure it faces
- Open joints, cracks and defects repaired before treatment
- Substrate tested to select a compatible treatment
- Wall cleaned down and allowed to dry
- Breathable water repellent applied at the specified rate
- Junctions, reveals and copings checked and made good
How the process works
Identify the exposed elevation
Wind driven rain usually attacks one face far harder than the others.
Repair before treating
A repellent over an open joint is decoration, not waterproofing.
Let the wall dry
Treating a saturated wall locks the water in, so drying time is built into the programme.
Apply and check coverage
Application rate matters as much as product choice, so coverage is measured.
What you get
- Reduced absorption without sealing moisture into the wall
- The defects that let water in repaired rather than coated over
- A drier interior wall on the exposed elevation
What affects the scope
- Which elevation is affected and how exposed it is
- How much repointing or crack repair is needed first
- Substrate type and whether a breathable product suits it
- Access, since full elevations usually need scaffold or a platform
This is a preliminary planning range, not a quote. A property visit is required before any price is confirmed.
Frequently asked questions
Will this stop rising damp?
No. Rising damp comes from the ground and needs a different approach. This treats water driven through the wall face by weather.
Does the treatment change how the wall looks?
A breathable repellent should be close to invisible. Anything that visibly coats the surface is a different product with different risks.
How long does it last?
It depends on exposure and substrate. It is a maintenance treatment rather than a permanent one, and we will say when it typically needs revisiting.
Services often needed alongside this
This service is part of Waterproofing.
Related work
