The Mapei Corporation Keracolor U 10 lb. Unsanded Grout with Polymer is white, covers up to 100 sq. ft. and can be applied indoors or outside on floors or walls.
How much grout do I need for a 50 square feet backsplash? You need 0.02626 ft³ of grout for a 50 ft² backsplash. Assuming the area covered by a single tile is 1 ft².
Calculating Grout for Your Floor
Therefore for 100 square feet, you would require around 10-12 pounds of grout, depending on the specific product's coverage recommendations.
Unsanded grout can be prone to severe cracking when it has pressure applied to it, making it unsuitable for most flooring applications. Sanded grout is the go-to choice for most interior flooring installations.
That's why you take care to apply grout in an even layer, making sure there are no air pockets or gaps. If you accidentally apply too much grout on your tile, or if the grout isn't mixed properly and dries unevenly, you might be left with a rough surface that's difficult to clean. If this happens to you, don't despair.
Mixing Ratios
Mix 2.9 pt (1.4 L) clean water to 10 lb (4.5 kg) grout. Mix 7.25 pt (3.43 L) clean water to 25 lb (11.34 kg) grout.
will yield approximately 0.9 cu. yd. (0.7 M3) of mixed grout depending on the specific mix design used. An 80 lb (36.3 kg) bag will yield about 0.65 cu ft (0.018 M3).
If the grout joint is not deep enough, there may not be enough grout material to form the essential cement particle bonds. The solution is simple: thoroughly clean out the grout joints so the joint depth is at least 2/3 of the tile thickness.
YIELD A 50 lb (22.7 kg) bag of QUIKRETE Non-Shrink Precision Grout will yield 0.45 cu ft (12.7 L) at flowable consistency.
Every manufacturer recommends 5/64″. The smallest grout line should not be less than 1/16”. This is an acceptable space that can be properly grouted.
On average, a 1/4" x 1/4" x 1/4" (6 x 6 x 6 mm) square trowel covers 80-100 sq. ft. (7.43 - 9.29 m²) per per 50 lb. (22.7 kg) bag.
Do not attempt to apply new grout over the damaged existing grout. Just applying new grout over the existing grout is called skim coating grout and the new grout will not properly adhere to the old grout. Over time the new grout will start flaking and chipping away.
As mentioned earlier, the specific recommended waiting time for grout to set and dry will vary based on the product and brand you are using. However, a common guideline is to wait approximately 15 to 30 minutes after applying the grout before wiping off the excess.
Sanded & Unsanded Grout
Unsanded grout is a cement grout with less than 1/8” grit. Generally, unsanded grout is used for tile applications with narrower grout joints, from 1/16” to 1/8”. The additional structure of sanded grout is needed for wider grout joints from 1/8” to 5/8” and some even can go as wide as 1”.
The shelf life of grout once opened is typically 6 months, but this will vary depending on the brand and how it is stored.
The volume of the grout is the sum of the volume of cement and water or 1.145 cubic feet. This assumes that there's no air entrapped in the paste. If air is entrapped, the volume will be greater. You can also calculate volume without knowing cement specific gravity if you first measure the unit weight of the grout.
Resin-Based Grout Options
These grouts are ideal for DIY projects as they're easy to apply and clean up as you go.
Tiny pinholes or cracks may appear due to your house shifting down a teeny bit deeper into the soil, causing minute changes in the structure. Another reason may be because there was too much water in the grout mix. When that water evaporated, it left behind big holes in the grout that you can see.
Thinset (also called thinset mortar, thinset cement, dryset mortar, or drybond mortar) is an adhesive mortar made of cement, fine sand and a water-retaining agent such as an alkyl derivative of cellulose. It is usually used to attach tile or stone to surfaces such as cement or concrete.