Before you waterproof: preparing the surface

Most waterproofing problems start before the first coat. A little time spent on the surface avoids much of the trouble later.

A short checklist

• Clean: remove dust, oil, laitance and loose material.
• Sound: repair cracks, honeycombing and damaged edges with a suitable repair mortar.
• Falls: check that water will run to the drains and not collect in pools.
• Moisture: confirm the substrate meets the moisture requirement on the product data sheet.
• Details: plan upstands, drains, pipes and joints before application begins.
• Primer: apply the primer recommended for the substrate and product.

Always follow the manufacturer's data sheet for the product you are using, and keep a record of conditions on the day of application.

Our team can advise on preparation for your project. Get in touch through the contact page.