Damp Proof Injection

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    Damp Proof Injection

    What is a damp proof injection?

    A damp-proof injection is used to prevent the passage of water that originates from the ground and enters through the structure of a building by means of capillary action, this is known as rising damp.

    Modern buildings are generally not affected by rising dampness as they will have a damp-proof course already, but older buildings usually do not, and so a chemical damp-proof course can be injected, which forms a continuous water-repellent barrier to prevent moisture from rising through the building’s structure.

    Ensure correct diagnosis

    Damp Proof Injection is only effective against rising damp, and as this is often misdiagnosed, this treatment of damp proofing is often wrongly proposed and is therefore ineffective.

    Before proceeding with the installation of an injected damp proof course, it is best to first of all check factors such as:

    • ground levels,
    • condition of downpipes,
    • pointing,
    • bridging renders etc.

    Read here for more information on how to correctly identify rising damp

    Damp Proof Injection
    Damp Proof Injection

    Damp Proof Injection Installation

    Holes are drilled into the mortar joint in a continuous line at 150mm above ground level, the number of which and depth vary in accordance with the wall's construction and its thickness.

    The water-repellent chemical, which is a high-strength silicon-based cream, is then injected into the holes; this then disperses along the line of the mortar and then cures to provide a continuous layer of protection from groundwater.

    What our customers say

    Damp Proofing Frequently Asked Questions

    This is subject to the area to be surveyed. We would say the minimum time, if it is in an isolated area in a small house, could be 40 minutes. However, if the property is substantially larger and requires both a timber and damp inspection, this could mean 2 hours plus.

    The surveyor will do both external and internal inspections of the property and accessible areas. Obstructions, furniture, boxes, panelling, and floorboards will not be moved. It is for the property owner to move these obstructions to allow the inspection.

    In short – No! We value our experienced surveyors Dean and Lee’s time and can give you the best advice. We charge a small fee to cover some of the costs as many times, some straightforward maintenance advice will remedy the issue without any work by us required.

    We have a range of survey fees from £95 to £295 to carry out a timber and damp inspection. Many clients have said that a thorough, honest investigation into their damp and timber problem put their minds entirely at rest and saved them money.

    The video below explains why we charge for surveys:

    If remedial works have been carried out, then – YES. However, check your written report to ascertain the length and type of guarantee and any exclusions or maintenance requirements.

    Our guarantees are up to 10 years long.

    We KNOW there are 20 and 30-year guarantees; however, our insurance company limits us to offer realistic guarantees. REMEMBER, a guarantee is WORTHLESS if the company has closed down!

    We offer the ability to purchase a GPI insurance policy for a one-time fee to run alongside our guarantee. See our dedicated page on GUARANTEES to find out more.

    Annabelle-and-Dean-Webster

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    Our mission is to give you the peace of mind you deserve when it comes to waterproofing your house or business. Commission a survey from our team to assess your situation professionally.