Building leak & damp inspection across Yorkshire
Water getting into a building is rarely self-explanatory. A damp patch on an internal wall might come from failed pointing five metres away. A persistent draught might mean a failed gasket rather than a gap in the external sealant. Treating the wrong thing - even correctly - solves nothing and delays the real repair.
Northern Seal & Joint carries out building leak and damp inspections to identify the actual source before any repair work is recommended or carried out.
Why accurate diagnosis matters
Most building defects we are called to repair have already been looked at by someone else. A previous contractor may have resealed the windows. A damp specialist may have recommended a course injection. Internal decoration may have been redone. And the problem is still there.
This happens because the symptom - a damp patch, a draught, a stain after rain - is easy to see, but the cause requires methodical examination of the building fabric to identify properly.
Carrying out the wrong repair means:
-
Spending money that does not fix the problem
-
Potentially delaying and worsening the underlying defect
-
Creating new problems where treatments were unnecessary
An inspection separates diagnosis from repair. It establishes what is actually happening before a single material is purchased or applied.
What we look for
Our inspections focus on the causes of water ingress, air infiltration, damp and related building fabric failure.
We regularly identify:
-
Failed or missing mortar joints allowing rainwater to penetrate brick or stone walls
-
Deteriorated external sealant around windows, doors and perimeter joints
-
Failed window or door gaskets causing draughts or water ingress at the frame
-
Brickwork or stonework absorbing excessive water through the face
-
Cracked, spalled or damaged masonry providing a direct route for water
-
Incorrect previous repairs - cement mortar on lime-built properties, sealed-over failed sealant, non-breathable coatings trapping moisture
-
Patio and external paving joints allowing water to penetrate to the bedding layer, building base or rooms below
We also look at the surrounding building fabric, not just the apparent defect point. In many cases, water travels some distance from where it enters to where it appears.
You can explore the issues we most commonly investigate on the Problems We Fix section.
Our three-tier inspection system
We offer a structured inspection approach matched to the complexity of the problem.
Tier 1 - Leak Triage Inspection
A focused visit for situations where the likely source is already apparent from the outside.
Typically used for:
-
Water appearing around a specific window or door
-
Cracked or missing mortar in a visible, accessible location
-
Patio joints that have clearly failed
-
A gap around a frame that can be seen from ground level
During this inspection, we examine the affected area and the surrounding building fabric to identify entry points and confirm the cause. We will advise on the appropriate repair and provide a clear recommendation. For straightforward situations, a Tier 1 inspection may lead directly into repair work on the same visit or shortly after.
Likely repairs: External sealant replacement | Cement mortar repointing | Window and door gasket replacement | Patio pointing and repair
Tier 2 - Diagnostic Building Inspection
A more detailed inspection used when the cause is not immediately obvious or when previous repairs have not resolved the problem.
Typically used for:
-
Internal damp patches that appear after heavy rain but have no obvious external source
-
Brickwork that saturates quickly and takes days to dry
-
Leaks that have persisted despite earlier repair attempts
-
Multiple potential causes that need to be systematically ruled out
This inspection examines a wider area of the building fabric:
-
Condition of mortar joints across the affected elevation
-
Window and door seals and perimeter joints
-
Masonry surface condition and absorption characteristics
-
Any routes where water may be travelling before it appears internally
A written inspection report is available where required - this may be useful for insurance purposes, for landlords, or where a formal record of condition is needed.
Likely repairs: Lime mortar repointing | Masonry repair | Breathable water-repellent treatment
Tier 3 - Access or Multi-Area Inspection
Used where the building requires inspection at height, across multiple elevations, or involves a larger or more complex property.
Typically used for:
-
Larger detached properties where multiple elevations need examining
-
Apartment buildings with shared fabric
-
Commercial properties
-
Higher-level masonry defects where the affected area is not accessible from ground level
This tier may require access equipment - typically a MEWP, drone or other high-level platform - to inspect joints, sealant and masonry condition at the affected height. We will advise on access requirements as part of the initial contact.
Before and after inspection
Before the inspection, it is useful to note:
-
When the problem appears (during rainfall, after rainfall, in cold weather, all the time)
-
How long it has been present
-
Any previous repair work that has been attempted
-
Any internal symptoms (damp patches, staining, mould, draughts)
This context helps us prioritise where to start looking.
After the inspection, you will receive a clear verbal recommendation - and a written report where requested - setting out what we found, what is causing the problem, and what repair approach we recommend. We will not recommend work that is not needed. If the situation warrants monitoring rather than immediate repair, we will say so.
Areas covered
Northern Seal & Joint carries out building leak and damp inspections across Bradford, Leeds, Harrogate, Ilkley, Otley, Skipton, Wetherby, Halifax and the surrounding Yorkshire area.
See the Areas We Cover page for full detail on where we work.
Frequently asked questions
Q1. Do I have to have an inspection before a repair? Not always. If the cause is clear - a visibly cracked joint, sealant that has pulled away from a frame - we can often move straight to repair. An inspection is most valuable where the cause is uncertain or where previous repairs have not worked. Q2. Do you charge for inspections? Get in touch and we will discuss the appropriate tier for your situation and advise on whether a chargeable inspection visit is the right first step, or whether the issue can be assessed and quoted at the same time as a repair visit. Q3. Can you provide a written report? Yes. A written inspection report is available on request, particularly for Tier 2 and Tier 3 inspections. This may be useful where a formal record of building condition is needed. Q4. Will the inspection tell me exactly what needs repairing? In most cases, yes. Occasionally a problem requires further investigation - for example, where the source of water is at significant height and cannot be examined without access equipment. In that case, we will be clear about what we found and what additional steps are needed. Q5. Do you carry out the repairs after inspection? Yes. If we inspect and identify the cause, we will provide a recommendation and quote for the appropriate repair. There is no obligation to proceed.