Structural waterproofing is used to protect a structure from rising or penetrating damp by the use of a physical barrier.
It can be used for:
- Party Walls
- Basement conversions
- Swimming pools
- Garage conversions (single skin)
- Installation of a wet room
- Properties built into a bank
- Bunds to fluid tanks in factories/farms
- Lining of concrete slurry tanks (agricultural use)
- Concrete floors where there is no membrane
- Areas of penetrating damp
As the term “structural waterproofing” includes a variety of systems, it is imperative that a survey is carried out by a qualified Damproofing or Structural Waterproofing surveyor, to ensure that the correct system is recommended and installed appropriately.
Most Common Types of Structural Waterproofing:
- Membranes. A preformed, mechanically fixed system that offers a range of designs for different areas. Uses a cavity drain system which re-directs water to a suitable outlet. Specific applications depending on the finish required.
- Cementitious. The use of cement based waterproofing slurries, usually multi-coat, including bitumous paints or epoxy coatings. These can be applied to clean concrete and masonry where the sub-structure is in good condition.
Drainage & Ventilation also play a vital role and must be considered as part of the structural waterproofing process.
Relevant Links: Koster Waterproofing Systems – Sovereign Chemicals Ltd – Delta Dorken – Property Care Association (PCA) - Federation of Master Builders (FMB)
Penetrating damp occurs where a structure is absorbing moisture from the top or sides, particularly to house walls or basement side walls where the ground levels may be higher on one side..
The signs to look out for are similar to those of rising damp, but can appear anywhere in the property.
- Penetrating damp can also be caused by lack of maintenance, i.e.
- Broken or blocked gutters/downpipes.
- Badly fitted window/door frames.
- Cracked outside renders.
- External ground levels.
Ignoring penetrating damp can result in other problems:
- Encourages Dry Rot
- Increases condensation and risk of black mould
- Can be detrimental to cavity wall ties
- Encourages frost damage to brickwork and renders
- Wet rot to timbers
If you are unsure about the cause of penetrating damp or how to solve it, get in touch with J & M Remedial Services for a survey and advice.