Waterproofing Products

The term Waterproofing covers a multitude of differing conditions, but is usually used to describe efforts to prevent moisture ingress through roofs and the vertical and horizontal surfaces of a building above ground level. Pitched roofs, flat roofs, balconies, patios, window frames, door frames, parapet walls, soffits and many other areas require protection to prevent moisture ingress which can adversely affect both external and internal surfaces. Various types of products are available to provide waterproofing to:
  • Pitched Roofs
  • Flat Roofs
  • Balconies
  • Doors and Windows
  • Expansion Joints
  • Parapet Walls and Soffits
  • Vertical Face Brick Walls

 
Pitched Roofs
The Tiling of Pitched Roofs is an area requiring specialized skills and help should always be sought from professional roofing companies. However, there are several areas requiring specific attention which either contractors or DIY enthusiasts may tackle:
  • Flashings
  • Ridge Caps
  • Outlets, Downpipes and Gutters
Safeguard Acryl Seal used with a polypropylene membrane can be used to protect these areas as well as Safeguard Rubberised Bitumen under some circumstances. Staff will assist in the right product for the job.
 
Flat Roofs
The best method of waterproofing a roof or any flat surface greater than 40sq m in area is by the use of torch-on membrane. Safeguard offers Systema and Sappi 4mm and 3mm APP as well as 3mm with mineral chip finish. Bitumen Primer and Bitumen Aluminium Paint are recommended for use with the plain membranes where areas are either non-trafficable or subject to light foot traffic. 
Cementitious waterproofing is not usually recommended for areas greater than 40sq m but may be necessary in those areas where there is limited to no threshold between the roof and any adjoining rooms. If there is any doubt, advice should be sought from our technical section.
 
Balconies
The same limitations regarding the area of the balcony will apply. Wherever the balcony slab is greater than 40sq m or is constructed of pre-fabricated rib and block material the waterproofing should be provided by torch-on membrane. The slab should be treated with Bitumen Primer prior to heat fusion of the torch-on membrane and, once cured, covered with a screed prior to tiling. Ensure that membrane covers side walls to a minimum of 100mm, ideally with a counter-flashing to stop any water ingress at the joint. Waterproofing should extend under any door frames/tracks and care should be taken to seal all fittings.
Where there is little or no threshold with the adjoining room, there may be no alternative but to apply several coats of waterproof slurry over the slab using membrane soaked in the slurry mixture. Once again, the waterproofing should lap side walls by a minimum of 100mm.
All joints between any skirting tiles, if fitted, and side walls should be sealed with an expandable polyurethane sealant to cater for differing rates of expansion of the substrates.
 
Doors and Windows
Most door and window frames are fitted flush to the surrounding substrate – either face brick or plaster. These materials expand and contract under the affects of the sun at varying rates usually causing cracking between the two materials and allowing moisture ingress. The best method of sealing these joints is once again with an expandable polyurethane selant.
 
Expansion Joints
Expansion joints are positioned in walls and slabs to allow for movement, most especially in roofing slabs and free-standing walls. These joints should be lined with a backing cord and then filled with an expandable polyurethane sealant to prevent moisture ingress. 
 
Parapet Walls and Soffits
Tops of horizontal surfaces such as parapet walls and soffits bear the brunt of UV attack and need special protection to prevent cracking of the substrate – usually plaster – and subsequent moisture ingress. This can be achieved by membrane soaked in Acryl Seal  or 2 coats of Acryl Fibre – a fibre re-inforced waterproof acrylic
 
Vertical Face Brick Walls
Penetrating Damp is most usually associated with buildings constructed of clay stock bricks. Clay stock bricks are usually highly impermeable but sometimes they have not been properly fired in the kiln and may be more porous than normal. More likely is the deterioration of the mortar mix, possibly due to frost or even acid rain. Traditional water repellents such as Raindance and Raincheck are applied to the surface in two coats, wet-on-wet, and have to be renewed every 2-3 years due to UV attack. However, Safeguard Europe’s latest innovation is Storm Dry which is cream-based and applied to the surface with a brush, penetrating the substrate to a depth of 2-3cm and requiring no renewal for a minimum of 20 years.
 
Call our technical staff for more details on all these products and applications.
 

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