

Guarantee on all damp treatments

Damp-proofing
experience

Damp survey and diagnosis
External walls are your first line of defence against rising and penetrating damp. If you have missing slate tiles, cracks in your brickwork or a failing damp-proof course, it’s only a matter of time before water penetrates your property – costing you time, money and unnecessary stress.
That’s why you should be proactive about property protection by putting the right damp-proofing measures in place straightaway. Whether it’s repointing, installing a new damp-proof course or replacing old and crumbling mortar, we can help you protect your property. Book your survey today.
Should you identify damp in your property, it might be tempting to ignore the problem to save time and money. In doing so, not only will you devalue your home, but you also face greater remedial costs later down the line. For that reason, identifying and fixing the cause of damp as soon as it’s detected is the smarter move for any property owner.
If your property is already suffering from damp exterior walls, it’s important to remedy the problem with the right course of remedial action. Whether it’s rising damp, penetrating damp or a combination of both, our specialists will survey your property, find the cause of damp, and send water on its way with a comprehensive and fully guaranteed treatment programme. Get in touch today.



Penetrating damp occurs when water infiltrates your property through external defects or internal issues, resulting in damage to your walls, ceilings, and furnishings. To effectively combat penetrating damp, it’s crucial to identify the source of water ingress and implement appropriate repairs. Our qualified damp proofing surveyor can assess your property to determine the cause of the dampness and the extent of required repairs.
Once the source of the dampness is identified, our damp proofing specialists will remove the affected material and apply a physical waterproofing membrane to expedite the drying process. Furthermore, external issues must be addressed, which may involve coating the exterior wall with a chemical water repellent to ensure water remains outside your property, protecting your living space from further damage. Prompt and effective management of penetrating damp is instrumental in preserving your home’s structural integrity and comfort.


Damp on external walls is a common problem. Where some non-invasive treatments – such as creams and sealants – might repair your walls, other types of wall damp might require more extensive work, such as damp-proof course replacement. To determine the right type of treatment for your wall damp, it’s wise to book a survey with a specialist.
Damp to external walls can be caused by:
• Cracks in walls caused by failing mortar or missing render
• Leaking pipework and other plumbing-related issues
• High soil levels leading to a bridged damp-proof course
• Excess rainwater absorbed by brickwork and other materials
• Broken guttering and downpipes causing water to penetrate masonry

Palmerston House Farren Court,
The Street, Cowfold, Horsham,
RH13 8BP
Palmerston House Farren Court,
The Street, Cowfold, Horsham,
RH13 8BP
© 2025 insituscp.co.uk. All rights reserved. | Designed by nu media group