Although parge coats act as a protective layer against moisture, water is a common cause of parging damage. This is especially problematic in the winter. When the coating comes into contact with ice, it can begin to absorb moisture. The water within the parging can expand when it freezes, often resulting in cracks.
How do you prepare for parging?
Wash the walls using a garden hose and a mild detergent such as dish soap to make sure you remove all of the little pieces. Parging mix sticks to walls better when they’re free of dirt and debris. When applying parging over painted walls, coat the walls with a bonding agent before you begin.
Does parging waterproof?
While parging is not waterproofing, and shouldn’t be thought of as a good enough barrier in and of itself, it can be an important player on your home’s waterproofing team. Parge coats, properly applied, can act as a barrier against rain and snow for the foundation walls that rise above the soil.
What is the best Parging mix?
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.
Does parging crack?
Although used as a moisture barrier, parging itself can sometimes become wet. When this happens, the water inside the parging can freeze and expand – resulting in cracks. … Above the frost line, the crack will appear due to both the parging and the adjoining soil freezing/thawing.
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.
How do you fix cracks in parging?
How to fix cracked parging for under $10
- Get an old toothbrush and thoroughly clean the crack. Make sure there is no dirt or debris inside the crack and that the surface is clean.
- Go to Home Depot and buy a quart of pre-mixed stucco patch for about $7.28. …
- Carefully fill the crack with the stucco patch.
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 do you get rid of old parging?
If the parge is thick, you can apply muriatic acid to the top surface and let it soak until the parge begins to soften. If you employ this method, use chemical-resistant clothing and safety gear, as this acid will cause injury if it contacts your skin or eyes.
How much should 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.
Can you add color to parging?
Different pigments do exist to alter the colour. If customers ask for different colour parging we will add the colour of black, brown, brick colour (red).
What is the difference between parging and mortar?
Foundation parging mix: factory-premixed formula; sold in bags. Has additives that make it easier to work with and improve adherence. Type N mortar: consists of Portland cement, sand and lime. This is the same mix using for bricklaying.
How long after parging can I paint?
Let exterior parge dry for at least two hours.
What can you use instead of Parging?
You can use acrylic stucco as a viable option for parging over concrete foundation walls. However, not all concrete foundation walls can effectively be parged using acrylic stucco. This kind of parging system comprises the last three layers Exterior Insulation and Finish Systems, commonly referred to as EIFS.
How important is Parging?
The importance of parging
Parging is vital to any wall to protect its surface from external forces such as rain, wind, ice, and snow. This protection removes the potential risk of moisture seeping into a masonry wall, as this can expand when frozen and crack the installation.
Can you Parge in the rain?
In fact they must be kept damp throughout this process, which requires more misting if the wind speed is high and/or the relative humidity is low. Once surface cured to prevent washing away (probably about 8 hours), rain will only help to keep the product moist.
Is cracked parging bad?
The good news is that cracked parging is rarely the cause of any serious problems with the basement. However, parging repair is often a great part of an overall strategy to prevent foundation problems further down the line.
Can quikrete be used for parging?
QUIKRETE® Water Resistant Parging Mix (115525) is a Masonry coating and patching of concrete walls for cosmetic. Used For: Concrete & masonry walls. …
Can you Parge below grade?
Concrete like everything else needs protection. Above grade receives the most damaging weather conditions compared to below grade, and absolutely should be parged from underneath brick to 2-3” below grade.
How thick should parging be?
You can buy parging mix—you just add water and mix it together. Remember to follow the instructions on the package. When you apply it to the area it shouldn‘t be more than ⅜ of an inch thick. You can smooth it out or give it a bit of texture using a plasterer’s rake or broom.
Is Type S mortar stronger than type N?
Type S Mortar
Like Type N mortar, type S is medium-strength (1,800 psi,) but it’s stronger than Type N and can be used for below-grade exterior walls and outdoor patios. … Type S mortar is made with two parts Portland cement, one part hydrated lime, and nine parts sand.
What kind of paint do you use for parging?
You can either go acrylic (latex) based paints, or masonry type paints. However, even if you rasp, wash the concrete walls and apply primer prior to painting, the external factors such as ice, water, wind and dirt will slowly chip away the paint and cause blistering and bubbling on the surface.