Economical waterproofing solution for Roofing

Economical waterproofing solution is a combination of a Liquid Applied bituminous Membrane (Sikaproof Membrane) with a cementitious mortar (Sikalatex Mortar) as protective layer for the roof.

    * Apply Sikaproof Membrane bitumen polymer modified waterproofing liquid membrane

    * Apply cementitious Sika Latex TH waterproofing slurry & mortar screed

    * Seal joints with high capacity movement Sikaflex Construction

    * Apply curing compound to protect the substrate from plastic shrinkage cracking

Sikaproof Membrane: Highly elastic, water based bitumen emulsion coating used waterproofing for concrete slab.

Sika Latex TH: A synthetic rubber emulsion used as a cement mortar admixture where good adhesion and water resistance is required.
Surface Preparation

    * All weak and unsound concrete must be removed by mechanical tool and repair when it’s necessary.

    * The concrete must be clean and free from dust, oil, or any laitance or loose materials and must be dry prior to the application of the Sikaproof Membrane waterproofing layer.

    * The existing concrete roof slab to which the waterproofing layer is to be applied should have strength of > 20 Mpa.

Application

    * Apply the first coat of Sikaproof Membrane (diluted with 50% water) onto the dry concrete substrate by using brush or spraying. The rate of application should be 0.3 kg/m2/coat.

    * Allow the first coat of Sikaproof Membrane completely dry prior (after 2 h) to the application of second coating (without diluted), with consumption 0.85 kg/m2/coat.

    * Allow the second coat of Sikaproof Membrane completely dry prior (after 3 h) to the application of third coating (without diluted), with consumption 0.85 kg/m2/coat.

    * The Sika Latex  bonding should be applied to the third coat of Sikaproof Membrane after approx. 4 hours.

    * Mix 1  liter Sika Latex + 1  liter of water + 4 kg cement by weight. Consumption 0.25 ltr Sika Latex/m2 .

    * Apply the Sika Latex mortar when the Sika Latex bonding slurry is still wet. Mix 1 liter Sika Latex and 1 liter water. Consumption 1 liter Sika Latex/m2/20mm thickness with a cement / sand ratio of 1:3 by weight.

    * The preferred finish to the Sika Latex  waterproofing mortar is by steel trowel and curing.

    * Cutting expansion joint for mortar layer.