What this service is for
- Weather-exposed commercial walls
- Preparation and surface repair before treatment
- Linked to wall coatings and render repair services
Damp and exterior weather protection problems this page covers
Survey checks before specification
- Visible damp pattern and likely moisture source
- Render, masonry, pointing and coating condition
- Ventilation, ground levels and drainage context
- Whether coating, repair or specialist damp advice is appropriate
Identifying the Cause of Damp on Your Building's Exterior
Before any treatment is quoted, the cause has to be diagnosed correctly, because the wrong fix wastes money and leaves the damp untouched. On commercial and industrial buildings the most common culprit is penetrating damp, where water passes through the external walls or roof rather than rising up from the foundations. A proper damp proofing survey looks at the whole exterior, identifies how water is getting in, and tells you plainly whether a coating, a repair, or a replacement is the right answer.
Typical external sources of penetrating damp we look for during a survey include:
- Cracked, blown or porous render letting water soak into the wall behind it
- Failed or missing pointing in brickwork and open mortar joints
- Blocked, leaking or overflowing gutters and downpipes saturating walls
- Tired, porous masonry on older or exposed elevations
- Cut-edge corrosion and failed laps on metal cladding and roof sheets
Types of Damp Affecting Commercial & Industrial Buildings
Not all damp is the same, and treating it as if it is leads to recurring problems. Understanding which type you are dealing with is the first step, and it is exactly what an exterior damp proofing survey is designed to establish. We will always tell you honestly if the issue sits outside exterior coating work, for example internal rising damp that needs a specialist damp proof course rather than weatherproofing.
- Penetrating damp: water tracking horizontally through walls, render, pointing or roofing, often the focus of exterior weatherproofing
- Rising damp: ground moisture drawn up through the base of a wall, usually requiring an internal damp proof course or tanking specialist
- Condensation: internal moisture meeting cold surfaces, normally a ventilation and heating issue rather than a coating one
Left unchecked, persistent damp does more than stain a wall. It can soften plaster, encourage mould, and over time contribute to wet rot or dry rot in any nearby timber, which is why addressing the water source quickly matters on a working commercial site.
Our Exterior Damp Proofing & Weatherproofing Solutions
Our work is exterior and survey-led. Once the cause of penetrating damp is identified, we treat it at source so the building envelope sheds water properly again, rather than masking the symptom. That often means repairing the fabric first, then applying a breathable weatherproof coating that keeps driving rain out while letting the wall release trapped moisture.
- Breathable, water-repellent exterior wall coatings to weatherproof porous and rendered walls
- Render repair to crack-fill and reinstate a sound surface before coating
- Protective roof coatings and cladding spraying to seal failed roof and wall sheets
- Cut edge corrosion treatment where rust at sheet edges is letting water track in
- Repointing and gutter remediation to remove the obvious water paths into the structure
We are clear about the coat, repair or replace decision. If a coating will genuinely solve the damp, we will say so. If a wall or roof is too far gone and needs replacing, we will tell you that too rather than sell a treatment that will not last.
