What does a parge coat do?
A parge coat is a method of sealing a masonry background prior to drylining with a system such as DriLyner BASIC. At British Gypsum we manufacture Gyproc Soundcoat Plus which is gypsum-based and designed to improve acoustic performance and reduce air leakage by sealing air paths.
What material is used 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.
Do you need a bonding agent for parging?
When applying parging over painted walls, coat the walls with a bonding agent before you begin. This bonding agent will help the mortar bond more successfully with the painted surface.
Can you waterproof parging?
Parging can be used on basically any vertical surface but it is most commonly seen on above grade foundation walls on the exterior, and on interior basement walls. A parge coat makes a water-resistant barrier, and if the jobs done right it can help keep your house dry.
Why does parging fall off?
A sudden drop in temperature is bad news for a freshly applied coat of parging. Water soaks into the parging, then expands as it freezes, cracking the surface and breaking off chunks. If the ambient temperature is too cold -the Parging freezes.
How thick should a parge coat be?
The parge coat is typically applied by hand, or by spraying, in a continuous coating with a minimum thickness of 6mm. As the walls are then finished with a subsequent top layer, it is not necessary to smooth the parge coat to a perfectly flat surface.
Can you Parge over old parging?
Applying a new layer of parging on top of an old layer is useless because it will also crack and fall off. It’s therefore advisable that you get rid of the parging that’s already damaged. Since you can’t remove the old parging with your bare hands, you will need a cold chisel and a mallet.
Can I Parge over old parging?
Is parging difficult?
Parging is made from a blend of lime, water, and cement. Adding the proper types and amounts for blending can be challenging, as it is a very tricky mixture to master.
How much does parging cost?
Basic parging is quick and easy and should cost $3-$4 per sqft. Adding mesh as well we’re maybe talking $5-$7 per sqft.
Is parging cement waterproof?
A parge coat makes a water-resistant barrier, and if the jobs done right it can help keep your house dry. Badly done parging contributes to moisture damage and can cause a type of deterioration of concrete known as spalling.
Can you parge over old parging?
Can a parge coat be used on a concrete foundation?
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. When it begins to show some signs of wear, often the best choice will be to replace it altogether.
What should I do with my parging coat?
Resurfacing involves applying a thin parging coat to restore a uniform surface. If there are severe breaks, the old parging should be removed and a completely new coat applied. A damaged or uneven area can also be covered in a metal armature, with parging applied over top to even out the surface.
What kind of cement is parge all AF?
PARGE-ALL AF is a light grayish cement color. Finished appearance may be enhanced by use of a standard colorant designed for concrete or cementitious materials. PARGE-ALL AF may be painted or coated with products that are designed for use with ordinary Portland cement concrete.
What kind of wall can parging be used on?
Parging can be used on new and existing walls, for both residential and commercial buildings, and can be applied to a variety of surfaces made of concrete, stone, or brick, including interior and exterior walls, foundations and columns.