Injection Mortar DPC 25kg

Preparatory Works
Expose the line of the proposed DPC by removing all external render. Lower external ground levels where necessary without affecting the structural stability of the wall. Remove skirting and fixings and put to one side if sound, to be refixed. Inspect associated flooring timbers and joinery for fungal decay and treat if necessary. Remove internal plaster to expose the line of the proposed DPC. Plaster should be removed to a minimum height of 1 metre or 500mm above the last visible evidence of dampness. Advise interested parties of possible inconvenience eg. neighbours with party walls. Install safety notices and advise other trades of risks.

Installation
Drill 19mm or 22mm holes at the intended DPC level at a downward angle of 30 degrees to a depth of approximately 4/5ths of the wall thickness. These holes should be drilled at 230mm centres. This should be repeated on the opposite wall surface ensuring that the holes are staggered giving overall maximum centres of 115mm. When drilling from one side the holes should be drilled at 115mm centres.

Following drilling the holes should be flushed out with water to remove bore dust and to ensure that the drilled holes are thoroughly wetted before insertion of mortar. Do not apply mortar to a dry wall.

Mix the mortar in the proportion of 3 parts water to 5 parts mortar by volume using cold water adding powder to water. Mix until a smooth cream consistency is achieved. Immediately fill the caulking gun with the mixed mortar and insert the nozzle of the caulking gun to the depth of the hole, the trigger action of the gun will gradually push the nozzle out ensuring that no air gaps are left and that the hole is filled to its full depth.

Only mix enough mortar for 20 minutes work and ensure that the caulking gun is kept clean and that any run down of mortar on wall surfaces is removed immediately with clean water

Finshing Work
The insertion of a DPC only controls further vertical ingress of water ie. rising damp. The walls above the DPC level remain wet and need time to dry out. This drying out time is governed by the initial moisture content and the wall thickness. BRE Digest 163 gives a general rate of 1 months drying out time for every 25mm of wall thickness. The first decorations following treatment should be regarded as temporary and the recommended decoration at this stage is a trade matt emulsion paint. Final decorations should not take place for at least 12 months following DPC treatment.

When replastering after treatment it is essential that a correct replastering specification is used to prevent contamination of the new surface by residual moisture and contaminant salts in the structure. This function has to be carried out strictly in accordance with the Permagard Replastering specification.

Product Data

Packaging: 25 kg sack

Storage: 6 months in dry conditions.

Consumption: As a general guide 25 kgs can be used as follows.

Wall Thickness Linear metres
225mm 20mts
345mm 11mts
450mm 8mts

Health & Safety
Contains Sodium Carbonate and can be irritating to skin. Normal powder handling precautions should be taken.
Do not breathe dust. Wear suitable respiratory equipment when working.
Irritating to eyes and skin – Wear overalls, gloves and eye protection.
Hands and exposed skin should be washed after use and before meals.
Eyes should be copiously irrigated with clean water for 15 minutes if in contact with material and medical advice sought if symptoms persist.
Use only in well ventilated areas.
Keep out of reach of children
In case of accidental ingestion seek medical advice.

COSHH Regulations should be adhered to where applicable.

FOR USE BY PROFESSIONAL OPERATORS ONLY