Roof Waterproofing Contractors.
Waterproofing Contractors in Durban, KwaZulu Natal since 2002.
Chemicals range of waterproofing products and systems that include specialised bituminous sheets, liquids, putties, cementitious based products and silanes. Bituminous sheet products are used to waterproof flat roofs, basement walls and to line earth dams and canals.
Liquid systems and putties including acrylics, solvent-based bitumens and water-based rubberized acrylic modified bitumens which are used to seal parapet walls, small flat roofs, roof bolts, flashings and ponds.
Cementitious slurry products are used to waterproof basements, foundations, tunnels, retaining walls, brickwalls and other underground structures. The silane systems are used to prevent water penetration of brick and natural stone.
Waterproofing Substrates & falls.
Industrial, Commercial, & Residential Waterproofing.
Boards laid to minimum falls of 1 in 60, the strength and thickness as per engineers specification. The moisture content is not to exceed 7% prior to torch-on applications.
Should light weight screeds be employed an additional sand cement screed is to be placed on top of the light weight screed, the strength and thickness as per engineers specification. Under no circumstances must the torch-on material be applied directly onto the light weight screeds.
Special care must be given to all expansion/construction:
NEW ROOFING
Prime all surfaces with bitu.®prime, including all verges, and around outlets and protrusions and allow the solvent to flash off. Extremely porous surfaces should be reprimed.
REJUVENATION
Strip existing waterproofing before priming all surfaces with bitu.®prime, including all verges, around outlets and protrusions and allow the solvent to flash off.
SURFACE PREPERATION
Surface areas should be dry, clean and sound, free of voids, sharp protrusions or contaminants.
Waterproofing Specifications.
Industrial, Commercial, & Residential Waterproofing.
Apply the first layer of 3 Ply malthoid or Index Rollbase fastened to the boarded surface. The 3 Ply malthoid or Index Rollbase must be applied providing for 100 mm side laps and end laps.
The mechanical fasteners anchoring the 3 Ply malthoid or Index Rollbase are to be spaced at intervals of 300 mm centres and shall be fixed incorporating 40 mm diameter washers.
Protection Layers
All plain exposed surfaces are to treated with 2 coats of silvakote as protection layer against UV rays. The coating should be applied 6 to 8 weeks after torching process to allow the surface to oxidise slightly thus providing good adhesion of the coating.
Flashings
Counter flashing over the balance of the parapet is recommended using super laycryl or super laykold.
Drainage Outlets
Specific attention must be given to the detail work when waterproofing the outlets to prevent ingress of moisture
Waterproofing Projects.
Industrial, Commercial & Residential Waterproofing.
Some of our recent waterproofing and torch on completed projects in Durban, KwaZulu Natal.
We prides ourselves on being your trusted roofing specialists, with a long track record of proven results and satisfied customers.
Contact us for all your Roofing, Thatching, Waterproofing, and Painting needs in Durban and surrounding KwaZulu Natal areas.
Roofing Specialists
Roofing Unlimited are your local roofing, thatching, waterproofing, and painting experts in Durban, and surrounding KwaZulu Natal areas.
Roofing Services
New Roofs
Roof Repairs
Thatching
Waterproofing
Torch on Solutions
Painting
Contact Info
Call us today to book a consult.
- Jean-Pierre Du Toit
- 082 330 8978
- info@roofingunlimited.co.za
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