Roof

Описание: Roof #waterproofing acrylic polymer modified cementitious coating system ‎@Sahara Waterproofing Co 


Roof waterproofing treatment Chipping the old surface removing the debris shifting dumping place cleaning the surface and preparation etc repair the crack and injection grouting will do if necessary applying waterproofing chemicals coating 2 coats Dr Fixit acrylic polymer modified cementitious coating above that laying waterproofing protective screed Concrete waterproofing with proper Slope and flase box marking side vata with admixtures WL Chemical Including Materials and labour with warranty of 10 years Roof brick bat coba ) Chipping the old surface removing the debris shifting dumping place and transportation shifting as per necessary. Cleaning the surface with machine cleaning or manual and preparation etc surface application with waterproofing chemical coating (Dr Fixit or equivalent Chemical ) Procedure of Brickbat Coba Waterproofing1. Surface Preparation

In the case of existing treatment, the coating on the slab top shall be removed, and surface cleaned by hard wire brush and washed with water. In the case of a new slab to be cast, the surface of the concrete must be roughened by scraping. In case the slab has already been cast, and the surface is fairly finished, the same shall be cleaned neatly of all mortar droppings, loose materials, etc.

The main aim of the surface preparation is to make the surface of the slab free from any oil, grease, dust, etc. Proper measures shall be adopted for all structural cracks as per standard practice.

2. Application of Slurry and Base Coat

The slurry is prepared with cement and water to a required consistency. It shall be applied over the dampened surface with brushes very carefully, including the joints between the floor slab and the parapet wall, holes on the surfaces and joints of pipes

The prescribed quantity of slurry application is 2.75 Kg of cement per Sqm. The pot life of the slurry shall be considered as 1/2 hour. The use of the slurry should continue up to a height of 300 mm over the parapet wall.

The laying of a 25mm thick base coat is carried out soon after the application of slurry when the application is still green. The cement plaster of 25 mm thick with a mix ratio of 1:4 is evenly applied over the concrete surface.

3. Placing of BrickBatWhile the base coat is still green, brickbats of the size (65mm to 120mm) are placed with a gap of 15 and 20mm. The brickbats shall be wholly burnt and are well soaked overnight before laying.

Once after laying of brickbats, curing is carried out for a minimum of 24 hrs after which, the gaps between the brickbats are filled with the same mix mortar used for base coat.

4. Laying of Protective Coat

A waterproofing compound confirming to IS 2645 is blended with the cement water mixture as per the manufacture specification. However, not more than 3 % of the waterproofing compound shall be used per 50 Kg of grey cement.

A cement mortar of a 1:4 ratio is prepared with the waterproofing compound and applied over the surface, including the haunches/ gola and 300mm on the parapet wall.


The surface is neatly finished with the help of wooden / steel hand float. The finished surface shall be allowed to dry for a while till a string mark can easily be made on the surface when 300mm x 300mm square marks shall be made over the entire surface.Apply a coat of Dr. Fixit Roofseal Classic (diluted with water in the ratio 2:1) as Self Priming 9.0 – 10.0 Sq.mt / litre. Allow coating to dry for 3-4 hours. Apply two coats of Dr. Fixit Roofseal Classic @ 2.0 - 2.2 Sq.mt / litre / coat, without water dilution, the rate of application being the same for both the coats. This would ensure correct consumption of material that will deliver a total DFT of 450– 500 microns. Allow the system to air cure for 5 days minimum. Check to see no void surface is left untreated / uncoated. The material having following technical Specification as per ASTM D 6083 M – Type II, Attains a Tensile Strength of 2.5 N/mm2 confirming to ASTM D 2370; Elongation at break ≥ 300% confirming ASTM D 2370, Adhesion to Concrete 2.0 N/mm2 confirming ASTM D 4541 and Crack bridging ability up to 2 mm, Air cure the coating for 7 days, before water pound test for 48 hrs. The system comes with 7 years waterproofing warranty from M/S Pidilite Industries. Treatment of Roof with Stagnant Water: Make the surface rough by hacking and chipping out the undulations portion. Extend it on the larger area for creating slop towards drain. Apply a bond coat of Dr. Fixit Pidicrete URP mix in the ratio of 1:1 (URP 1: Cement 1) by volume to make it lump free slurry when applied on in the pre wet surface. Prepare the Polymer modified mortar (PMM) mixing with Dr. Fixit Pidicrete URP 10% by weight of cement in the ratio of 1:3 when the bond coat is tacky, finishing with trowel etc. complete. Moist wet curing must be done up to 3-4 days.