Permeability & Masonry Restoration [DEMO]
What’s Permeability? In the masonry world, it’s the potential of a material to allow moisture and salt to pass through. Think of a scale from 0-100 — where 0 would allow no moisture or salt to pass through and 100 would allow 100% of the moisture and salt to pass through.
The average masonry perm rating is 30. That’s the bar in masonry restoration. If you’re using a product with a perm rating under 30, you are not allowing moisture and salt to pass through your repair. This will cause the repair to fail. Perm ratings under 30 are still permeable — they’re just not permeable enough for proper use in masonry restoration. A perm rating of 30 or higher is absolutely essential for successful masonry restoration.
If you know us and our products, you know that everything we do is about high-quality, long-lasting, do-no-harm restoration — whether we’re talking mortars, paints, or repellents. Our mortar perm ratings match natural masonry; our paints have a 92 perm rating; and our R97 Water Repellent has a perm rating of 97.
Watch the video for a great demo on permeability in masonry restoration, and if you need more info on our paints and repellents, click here.
If you would like to speak to someone about your project, give us a call or send an email to info@cathedralstone.com and we’ll connect you with a product specialist in your area.
