Can you overlap vapor barrier?
For ceiling vapour barrier 6 inches on each side of the vapour barrier so a total of one foot extra is enough. And also between each truss throughout the whole perimeter you should push the vapour barrier up so drywall can be installed properly.
What is the difference between Thinset and mortar?
Thinset is an adhesive cement used to secure floor and wall tiles to concrete surfaces. The word “thinset” is sometimes used interchangeably with “mortar,” because it’s a type of modified mortar made specifically for tile.
Can you tile straight onto screed?
Assess and prepare floor Screeds should be firm enough to walk on, usually at least 3 days after application, before tiling can be started. Concrete should be at least 7 days old. All substrates to be tiled must be clean and surface dry. Particular care should be taken that movement joints are adequately specified.
Is Versabond good Thinset?
Versabond makes reliable yet affordable thinset mortar, which is why it’s a mainstay in the home improvement world. So, if you’re worried that you won’t get a good bond or that you’ll have to redo your mortar after using Versabond, don’t be. In most cases, Versabond is a great pick.
What is tile underlayment?
Understanding Tile Underlayment There are various types of tile underlayment, but all serve to smooth out uneven spots in a subfloor and create an unbending layer that prevents the floor from flexing underfoot. Good underlayment also provides a waterproof barrier between the tile and the subfloor.
What is static modulus of elasticity of concrete?
The static Young’s modulus (E) is defined as the ratio of the axial stress to axial strain for a material subjected to uni-axial load [Neville 1997]. It is important that E of concrete be known because engineers increasingly use this value in the structural design process.
Can I use plastic sheeting as a vapor barrier?
In simple terms, a vapor barrier is a material that won’t allow moisture to pass through it, such as plastic sheeting. A very simple experiment to show how a vapor barrier works is to lay a plastic garbage bag down on some damp soil. There are two basic types of vapor barriers used with exterior wall insulation.
Does moisture barrier go up or down?
Direction. The placement of the vapor barrier depends largely on the climate where your house is. … The air is usually warmer inside the house, so condensation can build up from air entering the wall from the inside. The vapor barrier should point toward the room in this case.
Do you need to waterproof concrete?
Concrete can crack before or after hardening. Waterproofing is required at concrete structures to keep moisture out of the facility and to protect the structural components of concrete and imbedded reinforcing steel. If the integrity of the concrete is maintained, it can remain waterproof.
What do you put in cement to make it waterproof?
For the masonry of exterior walls with hard brick one often uses 1 part cement, 3.5 parts sand, 0.25 part lime. While for the same job, but with much softer limestone, a completely different mixing ratio is advised, namely 1 part cement, 9 parts sand, 2 parts lime.
Can you lay tile directly on concrete?
A: It’s perfectly acceptable to put tile directly on concrete — with a couple of caveats. First, it is important to determine if there is moisture coming up from the slab. Before laying your new floor, make sure the slab is clean.
How do I prepare concrete for tile?
Start by sweeping your concrete floor to get rid of all dust and debris. Then clean with a wet mop of plain water. Use a few tablespoons of a degreasing cleaner in warm water and scrub the concrete with a scrub brush. Finally, rinse thoroughly.
How do you calculate modulus of elasticity of concrete?
- ACI 318–08, (Normal weight concrete) the modulus of elasticity of concrete is , Ec =4700 √f’c Mpa and.
- IS:456 the modulus of elasticity of concrete is 5000√f’c, MPa.
What is the elasticity of concrete?
The elasticity of concrete is relatively constant at low stress levels but starts decreasing at higher stress levels as matrix cracking develops. Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension.
Do I need underlayment for tile on concrete?
Although you don’t need to install an underlayment between the concrete and the tile, you need to prepare the surface before placing the tile. After all, cracks and uneven areas in the concrete can cause damage to the tile above, and uncontrolled moisture in the concrete can destroy the mortar and loosen the tiles.
How do you install a vapor barrier on concrete?
- Roll the moisture barrier onto the floor lengthwise.
- Overlap the next row by 3 to 8 inches, depending on the manufacturer’s instructions.
- Seal the seams with a moisture-resistant tape all the way down the length of the row.
- Repeat these steps until the whole floor is covered.
How do I make concrete waterproof?
Concrete waterproofing – best methods and materials
- Cold-applied polymer-modified bitumen is a sheet membrane composed of polymer materials compounded with asphalt and attached to a polyethylene sheet.
- Densifiers react with the calcium hydroxide formed in hydration, creating another by-product that increases concrete density and slows water migration.
When should concrete be waterproofed?
If you see damage on the surface of the concrete, it’s a safe bet the underlying structure of your wall or floor is damaged too. If you want a concrete project to maintain its strength and fresh appearance, you need to waterproof it.
Should I put plastic over insulation before drywall?
Without poly beneath the drywall, water vapor hits the drywall and diffuses through to the drier (in summer) indoor air. By installing a sheet of poly there, you cut off that drying mechanism and water that finds its way into walls can stay there longer and do more damage.
What type of thinset do you use for tile on concrete?
Modified thinset is the product of choice for most tile installations because of its increased strength and bonding with minimal shrinkage, which means a reduced chance of cracks forming in the tile. WarmlyYours Radiant Heating recommends modified thinset mortar for nearly all tile and stone installations.
What is the modulus of elasticity for concrete?
The elastic modulus of hardened cement paste is around 10 to 30 GPa and that of aggregate is between 45 to 85 GPa. Concrete generally have an elastic modulus varying between 30 to 50 GPa.
Do I need to waterproof concrete floor before tiling?
Cement is actually a very porous material and can easily absorb water. Therefore, any concrete that may come into regular contact with water, such as under tile or for a pool, will need to be waterproofed. If cement is not waterproofed, it can cause issues with the mortar used between the tiles.
Do I need uncoupling membrane on concrete?
Concrete contains a relatively large amount of water and will shrink and expand due to humidity and temperature changes. Although some substrates absolutely require uncoupling membranes, they can be installed on a range of surfaces, including cement mortar, backerboard, OSB, and plywood.
Do you need a vapor barrier on concrete?
You’ll typically need a vapor barrier if you’re installing flooring over concrete. In high-humidity areas, moisture will move to a relatively low-humidity area, even through concrete. This way you can stop the vapor drive of water upward to your floors, protecting them from any damage (source).
Do I need plastic under concrete?
There’s only one-way moisture leaves concrete, though, and that’s via its surface. If you have a concrete floor that’s in continuous contact with a source of moisture, you’re going to have problems. This is why a vapor barrier under concrete is essential.
How do I tile over concrete?
More than almost any other type of floor covering, tile needs a rock-solid base. If you attach the tile to concrete, you need to take special precautions by uncoupling the tile from the concrete. Rather than using cement boards (CBUs), the favored method is to use an uncoupling membrane.
What is the best waterproofing for concrete?
The 14 Best Concrete Waterproofing Sealer 2021 (Reviews & Guide)
- 2.1 5 Gal Armor AR350 Solvent Based Acrylic Wet Look Concrete Sealer.
- 2.2 Siloxa-Tek 8500 Ready To Use Concrete Sealer.
- 2.3 Armor SX5000 WB DOT Approved Concrete Sealer.
- 2.4 Liquid Rubber Waterproof Sealant.
- 2.5 Premium Concrete Sealer.
- 2.6 Jetcoat Cool King Elastomeric Acrylic Coating.