Rising Damp

Moisture can cause annoying building problems and make living conditions unhealthy

There are a number of ways that moisture can access the internal areas of your building causing structural issues and leading to unhealthy living environments.

Here are 12 causes of building damp problems - recognise any

at your property?

  1. ​​inadequate drainage: water collects externally along walls, a lack of drainage causes high moisture levels impacting ground areas. 

  2. no waterproof coating of external wall faces: rain hitting a property's weathering side can soak into the wall, flow down and rest at the wall's base.

  3. a lack of / no damp proof course or weepholes along the external bed course of brickwork: having nowhere to drain, any moisture penetrating the external leaf will build up in the cavity, come into contact with the internal leaf and make the internal brickwork moist, damaging internal finishes.

  4. a lack of low-level air vents: inadequate escape of moisture vapour increases moisture in the cavity. 

  5. single–leaf construction: there is no air cavity within the wall to prevent moisture penetrating from external surfaces.

  6. the condition of the mortar joints - missing mortar in brickwork walls (i.e. from reticulation or wind-driven rain) allows water penetration from the surface to the internal leaf.

  7. the porosity of limestone footings - limestone footings soak up moisture at the base of a wall. Where there is a lack of exposure preventing evaporation moisture will travel to the next driest material being the external and internal leafs of brickwork. Sometimes brickwork sits directly on these footings.

  8. movement cracks and fractures: movement in the ground can cause cracks and fractures from the footings to the walls creating passages for moisture.

  9. the porosity of brickwork walls - porous brickwork and mortar soak up moisture from the ground, footings, and any water from reticulation or wind-blown rain, which travels up through the wall and damages internal and external wall finishes.​

  10. ​damaged / cracked shower tiles and grout and a lack / failure of the waterproof membrane beneath tiled finishes​ - water can escape and cause structural damage and leaking also to nearby areas including the concrete substrate below.

  11. no waterproof barrier: where the external ground level is higher than internal floor levels and no waterproof barrier exists, water can penetrate the brickwork and travel to internal walls.​

  12. breakdown or failure of waterproof barriers or coatings: a lack or failure of an external waterproof barrier allows moisture to transfer through the external leaf of brickwork to the internal leaf reaching the internal face and deteriorating internal finishes. 

 

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How to Treat Building Damp Problems to Prevent Further Damage

Building damage associated with falling, longitudinal and rising damp covers a vast range of repairs. Conspar treats all three forms of damp that affect buildings.

When it comes to rising damp, Conspar recommends treating external and internal walls to provide adequate protection from moisture penetrating the inside of the building from the outside and ensuring internal walls have solid protection against any escaped moisture otherwise being able to cause surface and structural damage.

 

During rising damp inspections, Conspar also addresses any drainage concerns of the area that may be contributing to the problem, such as soakwell functionality.​

WHAT IS RISING DAMP AND HOW TO STOP IT FROM CONTINUING TO DAMAGE YOUR PROPERTY

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