How long does parging take to dry?
Parging mix must be fully cured (approximately 28 days) and dry before painting.
What is cement parging?
Parging cement consists of sand and Portland cement, sometimes called a sand mix. The mix becomes a sticky substance when you add water. The product’s consistency must be sticky so it solidifies onto a vertical structure without sliding down.
Should you paint parging?
Why Not Paint Concrete? Applying parging to foundation walls helps to provide a first layer of defense against the exterior elements. Yes, parging will break down over time because concrete does not have an unlimited lifespan, but a properly applied parge coat will last for a very long time.
How long should parging last?
This is unfortunate because parging should last 30-50 years! Can you believe that? And even after that time, it should only need repaired mostly due to weathering. We have seen a lot of failed parging applications and attempts out here in Edmonton, Alberta.
Can you stain parging?
Short answer; you definitely can, but you shouldn’t. Assuming that the concrete foundation is grinded and rasped to the perfection (which is feat in itself already) the paint will only serve as a decorative purpose. Not only that, it will start chipping away and peeling off soon enough.
What is the best mix for parging?
For a quality parging mix its best to use a mix of about about 3 parts sand to at least 1 part portland cement. You can add 1/4 to 1/2 part lime powder to make it a little easier to spread or apply. This is mixed with enough water to get a nice consistency, not too runny.
How long should parging dry before painting?
Paint the parge just as you primed it. Add two coats, waiting two hours between each coat. Use a 1-inch nap cover to prevent runs. Let the finished parge dry for two hours.
Do you need to seal parging?
Parging is breathable and can stand the expansion and shrinkage caused by seasonal and temperature changes for a long time. Though it’s not exactly a waterproof system, it also provides protection against potential leakages if the necessary parts are sealed properly prior to parging installation.
How do you clean a parging cement surface?
Periodically clean the surface trowel by dipping in water, and smooth out the previously applied areas. Where two applications of parging cement may be required; the first coat is referred to as a “scratch coat”.
What are the requirements for the application and curing of parging?
Application and curing temperature (at least 5°C) must be respected. Parging must be periodically moistened during the curing period.
How much parging cement do you put on a wall?
The application should have an average of half an inch of parging cement on the wall surface. Periodically clean the surface trowel by dipping in water, and smooth out the previously applied areas. Where two applications of parging cement may be required; the first coat is referred to as a “scratch coat”.
How do you repair a parged wall?
One of the keys to a well done parging repair involves the preparation work. For purposes of discussion, we will consider that the damage to the existing parged surface is installed over a block foundation wall. Step one involves removing all of the old parging to expose the block structure beneath.