SR87/5kg Stop Rising Damp

Stop Rising Damp SR87

 

SR87: 1x 5 kg Tin 

A Jig is available to drill the holes, fast and neatly.

Covers 10 liner m of wall (500 g / linear m)

 

THE MOST COST EFFECTIVE, DIY, METHOD TO STOP RISING DAMP DEAD.

DO NOT APPLY ON FRESH MORTAR OR CONCRETE, AS THIS PRODUCT REACTS WITH THE CEMENT, AND STOPS THE CURING. If the old plaster is in bad condition, remove the affected areas, and re-plaster. Wait 3 weeks for the plaster to cure, then proceed as instructed below.

​ANY MATERIAL APPLIED ON THE SURFACE, IS MERELY A COSMETIC, SHORT TERM SOLUTIONS. MANY SUCH PRODUCTS ARE USED BY SELLERS WHO WANT TO HIDE DAMP PROBLEMS IN THEIR HOUSES.

Provides a 20 – year Chemical Damp Proof Course.

This material, SR87, reacts with the cement in the plaster, or the mortar, bonds with the mortar, and effectively stops rising damp.

1. Boundary walls do not have DPC by law (as the plastic sheeting, would separate the wall from the foundation, and create a weak point).
2. Apply 500 ml of SR87, per running m of wall, to stop rising damp. Easy DIY application.

​3. Hire a semi – professional drilling machine, get one of our special jigs to help make neat and fast holes at 45 degrees along the bottom of the boundary wall, or house wall. 

Drill 6 holes per brick (about 70 mm apart, in two staggered row, about half a brick apart in height) along the bottom of the wall, about 1 brick above the paving / floor level.

Use a 260 – 310 mm drill bit. Suck the dust out, with a vacuum cleaner.

N.B. MAKE SURE THE HOLES DO NOT GO RIGHT THROUGH THE BRICKS (measure the length of the drill bit, to make sure there is about 20 mm of brick  left at the end of the hole. The SR87 liquid would run down the back of the bricks, instead of into the bricks. Paint a line on the drill to make sure it does not go too deep.

IT TAKES ABOUT 15 MINUTES TO DRILL 1 liner meter of wall, with 6 holes / brick, in a ZIG – ZAG pattern. Please refer to photos.

 Pour SR87 into each hole., using a small plastic bottle with a thin nipple. BY APPLYING IN TWO ROWS ABOVE THE PAVING LINE, THIS LIQUID WILL RUN DOWN THE CLAY BRICKS AND CHEMICALLY BOND WITH THE LAYER OF MORTAR JUST ABOVE THE PAVING LINE. 

For cement stock bricks, the liquid will react with the entire brick, and the whole row of brick will become a water barrier. A chemical Damp Proof Course (DPC). In the case of cement bricks, its probably better to apply 4 x times per hole. Until the brick becomes saturated, and no more liquid goes in.

CONTRACTORS AND HOME OWNERS MUST MAKE SURE THAT ENOUGH LIQUID IS POURED TO CREATE A BARRIER WITHOUT GAPS, THROUGH WHICH HUMIDITY COULD RISE UP.

To get 500 ml / linear m, apply 3 times to each hole.  For a single wall.

​Boundary walls should be treated on both sides of the wall. House walls may have to be drilled on the outside, the inside or both, depending where the rising damp appears.

Each hole has a volume of about 6 ml. 1 linear m of wall has 4,5 bricks;

Drilling 6 holes / brick, gives 27 holes / linear m of wall. By applying 3 times x 6 ml, you are pouring 18 ml of liquid per hole, x 27 holes in 1 linear m, you use about 486 ml / linear m.

​The time for the liquid to be absorbed into the wall, depends on the type of brick.

Clay stock brick takes about 5 minutes to absorb 18 ml;

Hard Clay Face brick takes about 1 hour;

As the liquid does not react with the clay brick, it will run down through the brick and bond to the layer of cement mortar below the brick. This layer of cement mortar will become water – repellent, a chemical DPC (Damp Proof Course)

Cement stock brick takes about 1 hour to absorb 18 ml

(Note that cement stock bricks react with the SR87 liquid, as it absorbs it; hence it takes longer to absorb. The cement stock brick becomes water repellent.

​Humidity and moisture in the bricks will not stop the liquid from being absorbed.

The maximum water content that a brick will absorb is about 14% by weight. This has been checked by immersing bricks in water for 48 hours and weighing the water content.

​                                      

               DRY BRICKS and WET BRICKS

Apply 3 X 6 ml Per hole     –    TOTAL  18 ml per hole

DRY: ​Cement stock brick   

Time= 20 minutes    

 WET: Water content by weight: 11% 

FULLY SATURATED

Time = 30 minutes

 

DRY: Clay stock brick         

Time = 10 minutes    

WET: Water content by weight: 10%   

FULLY SATURATED

Time = 20 minutes

​

DRY:  Hard face brick           

Time = 60 minutes        

WET: Water content by weight: 5%     

Time = 2 hrs

 

 

OPPOSITION     –    WATER BASED COMPOUND

​DRY: Cement stock brick                Time = 10 minutes     

WET: Water content: 11%      Time= 15 minutes

 

 DRY: Clay brick        

TIME = NO PENETRATION 

​

WET: Water content: 11%     

Time = 12 ml in 2 hours, 30 minutes

 

4. Plug the holes with polyfila or building mix, and paint.

This liquid can also be applied to the top of concrete slabs, with about 5 mm penetration, it will stop water penetration. To prevent water penetration on top of painted boundary walls, sand the paint slightly off, enough to get SR 87 to penetrate, and soak the top 10 mm of the wall.