Dr. Fixit Roofseal Classic New

SURFACE PREPARATION

• Roof substrates must be pressure-washed with water jet having a minimum pressure of 1,400 psi to be used to remove all dirt, dust, chalking and waste products.
• When encountering roof substrates that have living organisms such as algae, mold or fungus, should be clean with 3:1 bleach or bio wash solution shall be used to kill and remove these organisms during the roof cleaning.
• Freshly laid cement sand concrete screed should be designed greater than 80 mm thickness and 50mm at the end slope, using waterproofing additives in concrete screed will reduce the shrinkage potential. The concrete curing takes about 8 weeks to be fully cured before application of Dr. Fixit Roofseal Classic New coating.
• Ensure the roof slope is at least 1 in 80 or 1 in 100, as per the specified requirements.
• Thoroughly inspect the terrace roof for cracks, blisters, ponding, exposed foam, and open seams. Evaluate the debonding of screeds or tiles on the terrace roof by tapping with a nylon hammer. Give special attention to areas around roof penetrations, ponding spots, and parapet wall cracks.
• Remove concrete screed, brickbat coba, China mosaic, or ceramic tiles if they are found to be deboned by more than 30% from the roof substrate during a hammer test. Proceed to reach up to the base slab level for fresh waterproofing as necessary.
• Ensure there is a 1 water drain outlet of a minimum of 100 mm Dia for 500 Sq. ft floor area and gaps around pipe inserts should be sealed properly with polymer modified mortar.
• Stagnant water caused by undulations in the roof surface should be identified and repaired using Polymer-Modified Mortar (PMM).
• All joints / corners / rainwater outlets, marble / tile strip joints should be grouted with PMM.
• Ensure that all penetration points, mechanical equipment, HVAC & solar panels are suitably placed on the upstands.

SCREED REPAIR

• Remove loose and damaged / hollow sound concrete roof screed in pockets with mechanical cutter.
• Clean the concrete screed with water to remove dirt and loose particles.
• Brush applies a bond coat of SBR based polymer & cement mixed in the ratio of 1:1 (SBR polymer 1: Cement 1) by volume to make it lump free slurry coat. Repair the damaged concrete screed surface with Polymer Modified Mortar mixed with SBR based polymer 10% by weight of cement in (M20) concrete in ratio of 1:1.5:3 i.e., one bag of 50 kg cements: 1.5 times volume of sand: 3 times volume of aggregates: 25L water.
• Level the repair mortar and finish with trowel by providing proper slope. Moist cures the repaired surface for 7 days. Air cure screed for 4-5 days, before application of roof Dr. Fixit Roofseal Classic New coating system.

TREATMENT OF ROOF WITH STAGNANT WATER

• Make the surface rough by hacking and chipping out the undulations portion. Extend it on the larger area to create slope 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. Moist wet curing must be done up to 3-4 days.

SCREED CRACK REPAIR

• All visible hairline cracks on concrete roof screed > 0.50 mm and not giving hollow sound, should be cut and widen in V shape with mechanical cutter in the size (10mm W x 6mm D) and filling the same with Feviseal HY 100/300 sealant with suitable gun.
• Allow sealant to cure a minimum 72 hours (about 3 days).
• Apply a bandage of Dr. Fixit Roofseal Classic New in 2 coats with 45 GSM glass fiber mesh over and above the crack repair surface.

RAINWATER OUTLETS TREATMENT

• Hacking and chipping the surface around the rainwater drain outlet mouth up to 25mm in depth.
• Apply a bond coat of SBR-based polymer, Dr. Fixit Pidicrete URP, and cement mixed in a ratio of 1:1. (Polymer 1: Cement 1) by volume over the corners and pipe insert outlet gaps. Filling the gaps around the drain mouth with PMM polymer-modified mortar mixed with Dr. Fixit Pidicrete 10% by weight of cement ratio of 1:3.
• Providing and fixing 100-mm-wide, 45-gsm glass fiber mesh all around the periphery of the drain mouth of a rainwater outlet sandwiched with Dr. Fixit Roofseal Classic New waterproof coating Apply the second coat for an interval of 4-6 hours, all over the rainwater outlet.

VERTICAL UP STAND DETAILING

• Providing a 100mm x 100mm square or rectangle upstand of M20 grade concrete or with polymer modified mortar around mechanical equipment like HVAC, air conditioning, solar panels, etc.
• Apply a self-priming coat of Dr. Fixit Roofseal Classic New, dilute with water in the ratio 2:1, and follow by application of 2 coats of Roofseal Classic waterproof coating sandwiched with 45 gsm glass fiber mesh without dilution in the interval of 4–6 hrs. Ensure that all the reinforcement is properly placed or positioned.

WATERPROOFING APPLICATION

• Apply one self-priming coat of Dr. Fixit Roofseal Classic New (diluted with water in the ratio 2:1) at the rate of 10.0 to 11.0 sq. m./ltr. Allow it to dry for 2-3 hours.
• Apply the first coat of Dr. Fixit Roofseal Classic New at a rate of 2 to 2.2 sq. m./ltr./coat. Allow the coating to air cure for a minimum of 4–6 hours to walk, and apply a second coat at 90° to the first coat. Apply second coat, at the rate of 2 to 2.2 sq. m./ltr./coat. The system will achieve a total dry film thickness of 450–500 microns.
• The coating should be terminated below the drip mold on the vertical surface. All corners, gaps, joints, and roofleak repair area and outlets shall be coated with two extra coats.
• Air cures the coating for 7 days.

POST APPLICATION

• Let the waterproof coating cure for at least 7 days before you proceed with your flood / pond testing by ponding water up to 50mm height for 24 hrs.

PARAPET WALL WATERPROOF COATING

• • Apply one undiluted coat of Dr. Fixit Raincoat Waterproof Coating (Basecoat) at 4.2-4.7 sq m/liter/coat for a 100–120-micron film. Follow with one coat of Dr. Fixit Raincoat Classic/Select Topcoat (color optional) after 6-8 hours, undiluted at 6.0-6.5 sq m/liter/coat.

• For vertical Parapet or masonry plaster walls apply two coats of Dr. Fixit Roofseal Classic New at 1.65–1.85 sq. m./liter/ 2 coats without dilution. Follow with one coat of Dr. Fixit Raincoat Classic/Select Topcoat (color optional) after 6-8 hours, undiluted at 6.0-6.5 sq m/liter/coat.