Index of Documents DC001 Recommendations for Periodic Cleaning of Dryvit Finishes and Coatings DC002 EIFS Repair - Small Holes, Impact or Hail Damage Repair Using RapidPatch™ DC003 EIFS Repair – Impact Damage DC004 EIFS Repair – Corner Damage DC005 EIFS Repair – Cracks in Aesthetic Reveals DC006 EIFS Repair – Cracks DC007 EIFS Repair – Cracks at Corners of Doors, Windows, Air Conditioners, Etc. DC008 EIFS Repair – Floor Line Location in wood Frame Construction DC009 EIFS Repair – Terminations at Sealant Joints DC009A EIFS Repair – Overlay Sealant Joints using Sealant DC010 EIFS Repair – Adding Expansion Joints Around Windows DC011 EIFS Repair – EIFS System Installed Tight to Shingles DC012 EIFS Repair – Reattachment of EIFS DC013 EIFS Repair – Correcting Finish Texture Irregularities DC014 EIFS Repair – Frozen and Delaminating Finish DC015 EIFS Repair – Hot Knife Procedure dryvitCARE™ EIFS Repair Procedures DS498

Introduction The long-term appearance of any exterior wall depends primarily on the attention given to periodic cleaning. Dryvit's DPR and other textured acrylic finishes offer many advantages for ease of cleaning and maintenance compared to other types of exterior wall claddings. Brick, for example, requires the use of strong acidic cleaners to remove even the accumulation of routine dirt that works its way into the pores of the brick. Use of such acidic cleaners can cause many problems. It is strongly recommended that you contact the manufacturer of any cladding material for proper cleaning...

recommends consulting the cleaning product manufacturer for suggestions specific to the job at hand. Testing the cleaning compound on a small and isolated area of the actual finish surface is always advised prior to commencing on a large scale. Usage instructions from manufacturers of cleaning solutions for general cleaning of Dryvit finishes typically include the following information: Preparation Protect people, vehicles, property and all surfaces not intended for cleaning from splash, residue, fumes, rinse and wind drift. Read the cleaning solution manufacturer's instructions for the proper...

This setup permits the operator to apply cleaning solutions to a wall over 30.5 m (100 ft) from the base unit. Other systems have two separate hoses - one with plain water and the other with a cleaning solution. Portable equipment has many advantages for cleaning building exteriors. Units may be on wheels, skids, trailers, or pick-up truck beds. More elaborate systems include pumps, engines, and water storage tanks fixed on truck beds. Whatever method you select, it is safest and least potentially damaging to the Dryvit finish and the wall surface if both equipment and personnel are kept on the...

Cleaning Solution Application Application of cleaning solutions can be accomplished using a low-pressure sprayer, 30 to 50 psi (200 to 350 kPa), or through a pressurized water cleaning unit. The pressure used must be adequate to coat the finish surface with the cleaning solution and not more. Chemicals in the cleaner provide the cleaning action, not the force of the water spray used to apply the cleaner. Light scrubbing with a soft bristle brush may be necessary. Follow the cleaning solution manufacturer's instructions for application and scrubbing. Some solution manufacturers recommend application...

the finish is abraded or removed. This must be avoided. Finish damaged by such "power washing" techniques alone can void product performance warranties. Cleaning of Mildew and Algae Growth Mildew and algae are commonly found on dirty, exterior wall surfaces that receive little sunlight. These organisms can grow wherever food (dirt) and favorable temperatures and humidity are found. Some cleaners work on mildew only. Others can also be effective on algae. Still others can effectively clean both organisms, while also being effective for general purpose cleaning. It is safe to assume that if there...

Removal of Efflorescence Efflorescence can occur whenever the substrate beneath the Dryvit finish contains cement. It is caused by the migration of water through the cementitious material and interaction with salts present in it. The water containing the salts works its way to the surface of the finish where the water evaporates and leaves the salts – efflorescence - behind. It is more easily noticed on darker surfaces. Efflorescence on the finish surface is more an aesthetic than a performance issue for the finish. However, the source of the water migration should be determined since it can...

General: Holes or other damage less than 76 mm x 76 mm (3" x 3") in size can be easily repaired using Dryvit RapidPatch product. The product needs to be applied at a thickness of 9 mm – 25 mm (3/4" – 1") to allow proper heat generation for rapid cure. Under normal conditions, finish can be applied the same day. Procedure: 1. With a sharp utility knife, cut through and remove the lamina, exposing a neat uniformsized area of insulation slightly larger than the damaged area. Using a disk grinder or belt sander with a 20 grit aluminum oxide disk or belt, remove the finish around the cut, exposing...

General: This procedure describes the method to repair impact damage. Impact damage can result from landscaping activities, vandalism, severe hail, etc. Procedures: 1. Mask off an area slightly larger than the damaged area. Using a sharp utility knife, hand or circular saw with a carborundum blade, cut into the EIFS down to the substrate, outside of damaged area. Remove the damaged EIFS exposing a neat uniform size area slightly larger than the damage area. 2. Grind off finish a minimum 76 mm (3") to expose the existing base coat layer. CAUTION: Care should be taken not to damage the reinforcing...

EIFS Repair –Corner Damage DC004 General: Corner damage may be caused by impact from objects such as carts, cars or vandalism. Repair involves removing and replacement of materials in the affected area. Procedure: 1. Using a sharp utility knife, hand or circular saw with a carborundum blade, cut approximately 76 mm (3") along each side of the corner down to the substrate. With a margin trowel or similar tool, carefully remove the sections. 2. Examine the piece removed to determine if there is any damaged to the sheathing. 3. If any damage to the substrate is present, repair prior to EIFS application....