Double GlueDown Worksheet

The Double Stick Installation Method has been very popular in the past few years and it is continuing to be installed in numerous facilities. However as an installation system, it has not gone without problems. Indicative of failures is buckling and seam separation. The culprit made is related to a single problem or a combination of problems.

Failure in the double stick method can occur from:

1. Problems from Moisture

From Geology

Water Tables

Soils

Alluvial plain

Hillside lot(cut or filled)

Land use changes ( low density to high density)

From Concrete

Water/cement ratio

Curing

Use of Visqueen

From Landscaping

Sprinkler systems

Vegetation

Drainage, storm gutters

Drainage (swells) impedance of flow

· From Maintenance

HVAC(Temperature, humidity)

Waiting period before cleaning

System (frequency)

2. From Adhesive

Solids, filler load, ash content, viscosity, pH

3. From Cushion

Type (correct)

Laboratory test (Ash content, volatile matter, moisture absorbency)

Plasticizer migration affecting the adhesive

4. From errors in the installation

Floor preparation (patch, VAT OR OLD CUTBACK ADHESIVE REMOVED)

Acclimation

Proper Tools, correct trowel size

Correct Adhesive

Proper Open Time

5. From Manufacturing

Dimensional stability