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How Long Should it Take to Cool a House From 80 to 72?

The average person cannot live without some form of climate control, especially in hot climates. There are many reasons why your house is too hot, but the most common causes are a malfunctioning thermostat or heavy insulation. Household thermostats regulate the temperature in a house by measuring humidity and air temperature and turning on the heat as needed to reach a specific temperature.

The average air conditioning unit takes about 2.5 hours to cool a house from 80 to 72 degrees. At most, an AC can take about 3 hours to cool a modern 3-bedroom to 4 bedroom house about 10 degrees. Some of the factors that determine the time taken to cool your house include outside temperature, the square footage of the house, and the performance of your AC.

How Long Does It Take an AC to Cool a House?

Air conditioners (AC) are designed to cool an enclosed space, like an office or a house. When it is not working properly, it can take more than 12 months to cool the space again.

The first thing that you need to do is remove any furniture and electronics that are in direct contact with the floor. This will help the AC work better because they release heat which makes it difficult for your AC to cool your house.

Next, make sure that there are no obstructions on the surface of the AC unit so that air can circulate freely across its coils and condenser coils.

You also want to make sure there’s nothing blocking the airflow of your AC’s vents so you’ll want them pointing down instead of just laying on a flat surface or pointing up into a corner.

Why does it take longer to cool down a house?

A house, like any other closed space, can be considered an insulated container; it will require the same amount of energy (work) to cool it back down to its original temperature.

The difference is that while a box of air close to your skin will only require the same amount of work (energy) for you to cool down, your house requires more energy because there’s more matter inside; this means there are more walls and ceilings in contact with the air inside.

Tips for Quick Cooling of the Home

The days are getting hotter and hotter, meaning that cooling off can be difficult. There are a few ways to cool down your home without breaking the bank.

The first thing you should do is find out if your home has any kind of insulation or sealant that needs to be fixed. Seal up any cracks in the foundation, insulated pipes, replace old insulation in the attic, install weather stripping around doors and windows, check for air leaks in the attic or basement, place an air conditioner at the opposite end of the house to help cool it down.

Is Air Conditioning Really Necessary?

Air conditioners are an important accessory in homes and workplaces. The working environment of someone is directly affected by the temperature, and an air conditioner can make a workplace more comfortable.

Air conditioners also help save energy costs by running the air conditioner for shorter periods of time which is more efficient than running air conditioning on a continual basis. This way, you aren’t using as much energy to cool the place down.

How to Maintain Your Air Conditioner

An air conditioner requires regular maintenance to help you regulate temperatures in your home. Some of the things you should do to ensure the AC is in proper working condition include:

Change air filters

Air filters may get clogged by dust and debris trapped by the air conditioner. This clogging hinders airflow, and it can force the AC to work much harder to cool your home. To keep the AC in its top performance, you should replace the air filters frequently.

Checks leaks

If the AC has leaky ducts, they could be allowing air to escape in unconditioned rooms in your house. Energy Star estimates that leaky ducts account for about 20 to 30% of air lost in the house, which means that your home will take longer to cool off.

Hire a skilled technician

While it is possible to watch AC maintenance YouTube videos, you should hire a skilled technician to inspect your AC for any faulty parts. The technician can help you repair any leaks and replace the air filters before your energy bill hits its peak.

How Long Does the Average A/C Unit Last?

The average lifespan of an air conditioning unit is between 10-12 years. This is because air conditioning units are subjected to severe weather conditions and the heat they produce can shorten the lifespan. There are some great models that have a lifespan of up to 20 years, but these are much more expensive.


If your air conditioner is taking too long to cool your home, you should try to find out if it is faulty. Common issues such as blocked air filters and leaky ducts can slow down the performance of your AC, and it can prolong the duration it takes to cool down your home in extremely high temperatures. At normal working conditions, your AC should cool down your house from 80 to 72 within 2.5 hours, or at most 3 hours. If takes longer, maybe it’s time to call your technician for a quick inspection.

How Long Should a Concrete Slab Cure Before Framing

When you pour a new concrete slab, you should allow it enough time to cure. A well-cured slab improves water tightness, durability, strength, and resistance for the years it will be in use. To get the strongest foundation out of your new concrete, you should observe the timelines for the curing process.

To start framing, you should allow the poured concrete slab to cure for at least 7 days from the date of installation. At this point, the concrete has attained at least 50% of the final strength, which is adequate to begin building on the concrete. If you want to start building when the concrete is fully cured, you may have to wait for at least 28 to 60 days from the date of installation. Curing is a continuous process, and you should spray water and maintain constant temperatures of at least 50 degrees Fahrenheit during the curing process.

How Concrete Cures

The three main components of concrete include cement, aggregate, and water. When you mix cement and water, a chemical reaction occurs and this binds the two components together. The binding process is what causes the concrete slab to harden.

In the binding process, the concrete becomes porous, and as long the cement is in contact with moisture, it will continue to harden to give the structure maximum strength. This is why it is necessary to spray the concrete slab with water at least 5 times every day before you start building on the slab. As soon as the concrete is poured, the curing process starts immediately.

How Long Should a Concrete Slab Cure Before Framing

In standard industrial standards, a 4-inch concrete slab achieves full strength at 28 days. However, you don’t have to wait until the 28 days lapse to start framing. After 7 days, the concrete slab will have cured to 70% full strength, and it can support loads like the framing for a house.

Once you pour the concrete, you should keep these timeframes in mind:

24 hours

Once you pour the concrete, you should wait at least 24 to 48 hours to allow movements on the slab. You can remove the forms since the slab is stable enough to hold itself together. You can allow light movements of pets and people on the surface. However, the slab is not yet strong enough to hold heavier loads such as cars and bikes.

7 days

Within a week, the concrete is at least 50% cured, and you can start framing the walls. This concrete is strong enough to hold traffic from light vehicles.

28 days

The concrete is now fully cured at this stage. If you poured the concrete on a driveway, you can drive heavy vehicles such as trucks and RVs on the concrete.

Key Factors That Determine Curing Time

When the concrete is fully cured, it provides a stable foundation for the structure that will be built on top of it. Here are key factors to consider:


When you pour concrete, it can take about one week of curing for the concrete to establish half of the final strength. Depending on the weather (and other factors), concrete can establish full strength within 28 to 60 days.


Proper curing requires warmer temperatures above 50 degrees Fahrenheit. Keep the temperature constant during the curing period for strong concrete bonding. If the temperature falls to 20 degrees Fahrenheit or lower, it can weaken the curing process, and prolong the period you have to wait to establish at least half of the final strength.


The recommended concrete procedure requires builders to apply a sealant to the concrete slab as soon as the forms are removed, and the surfaced dried up. The sealant helps trap moisture within the concrete, which is required for proper curing. An alternative to using a sealant is wrapping the concrete slab with waterproof paper or plastic sheet, both of which help retain moisture and improve the curing process.

How to Cure a New Concrete Slab (To Reduce the Waiting Time)

If you are looking to speed up the concrete curing process, here are some of the things you can do:

Spray water

Once you pour concrete, you should spray water 5 to 10 times every day to help in the curing process. When the concrete has enough moisture, there will be less evaporation, and the concrete will bond quickly. If there is no sufficient water, the concrete will cure fast, and this will result in weaker overall strength.

Cover the concrete slab

You can also cover the slab to help trap moisture. You can use this option if you are not available to spray the slab with water. Before you place a cover, wet the concrete first with water to keep the surface wet and improve curing.

Use curing compounds

You can buy curing compounds from your construction supplies store or concrete providers. These compounds contain an ingredient that forms a protective film on the concrete surface, hence allowing the slab to retain moisture.

Things to Avoid When Pouring New Concrete

When pouring concrete, there are certain things that can slow down the curing process. They include:

Pouring concrete in the cold

If the temperatures are low (below 20 degrees Fahrenheit), you should wait until it is warmer to pour the concrete. Pouring concrete in cold weather could result in a building that is not structurally sound since the concrete will be improperly cured. Experts recommend pouring concrete when the temperature is 50 degrees Fahrenheit and above.

Heavy load

Once you pour concrete, you should allow at least 24 hours to allow foot traffic. If you allow traffic sooner than 24 hours, then the concrete will have clear marks of footsteps, and you may have to redo the work. For heavy loads such as cars, you must allow the concrete to cure for at least 7 days or 28 days for heavier vehicles such as RVs and trucks.


When does curing start?

Once you pour concrete, the curing process starts immediately. However, sometimes it can start after 6 to 24 hours depending on the cement-water ratio and prevailing temperatures. Proper curing needs warmer temperatures of at least 50 degrees Fahrenheit.

How long does a 4-inches of concrete take to cure?

A 4-inch concrete takes 7 days to establish at least half of the final strength. However, curing is a continuous process, and it can take at least 28 days in warmer temperatures to be fully cured.

How long should you let the concrete cure before building on it?

After the concrete is placed, the curing process starts and you should allow at least 7 days for the structure to be at least 50% cured. At this point, it is 50% stronger than uncured concrete, and you can start building on it. However, waiting longer for at least 28 days reduces the risk of cracking, since the concrete will have attained the maximum strength.

Related: How to make a hole in a glass without a drill

6 Ways on How to Make a Hole in a Glass Bottle Without a Drill (Without Shattering It)

A drill is one of the handy tools that we need for DIY home improvements. However, there are situations where you may need to drill a hole in a glass bottle but the drill is unavailable or you don’t have the required drill bit. When you find yourself in this situation, you must get creative and find a quick solution to the problem.

If you want to make a hole in a glass bottle without a drill, you can use a string and kerosene. You will need an 8-inch string, kerosene, and match. Start by figuring out where you want to drill a hole and tie a string around that spot. Soak the tied string in kerosene for about 3 minutes, and place it on your target area. Immediately, light up a match and let it burn around the circle for a few minutes. You can then use a screwdriver to tap the area inside the burning string to make a hole.

There are several safe methods on how to make a hole in a glass bottle without a drill. These methods are simple, you can get started with locally available materials.

5 Method of Making a Hole in a Glass without a Drill

1. String and kerosene

The string and kerosene method is the easiest method that you can use to cut a hole in a flat glass surface or a glass bottle. You can also use this method when you need to cut a glass bottle in two halves.

You will need these items:

  • Kerosene (about 50 to 100 ml)
  • 8-inch long string
  • Matchbox

Follow these steps to create a hole using this age-old technique:

  • Start by identifying the target area where you want to create a hole on the glass.
  • Use a string to measure the spot, and tie a circle string equivalent to the hole you want to make.
  • Dip the tied string in kerosene and let it soak.
  • Remove the string and place it on the target spot.
  • Strike a match to light up the soaked string while still placed on the glass. Let the string burn for a few minutes to heat the glass surface.
  • Use a screwdriver or other object with a pointed end to flick the glass surface in the string’s middle point. Tap the glass gently while still hot until it creates a hole in the target area.

2. Using Glass Cutter

If you are a DIY person, you most likely have a glass cutter in your tools box. You can buy a glass cutter for less than $20 to help you with such small tasks.

When using a glass cutter to create a hole in glass, you need the following items:

  • Glass cutter
  • Duct tape
  • Marker
  • Bottlecap (equal to the size of the hole required)

Follow these methods to make a hole using a glass cutter:

  • Use a bottle cap to isolate the area you want to cut a hole. Use a marker to circle the target.
  • Cut a duct tape and cover the target area on the glass to guide the glass cutter.
  • Take the glass cutter and cut the target area by following the marked area.
  • Once you have circled the target area, use a screwdriver to tap the middle point until it cracks and falls off.

For added safety, you can wear gloves to avoid injuries when the glass cracks.

3. Tapered file with kerosene

A tapered file is a versatile tool that you can use to drill a hole in a flat surface or other types of glass surface. Using a tapered file can take longer than a glass cutter.

You will need these items:

  • A tapered file (three-cornered)
  • Kerosene
  • Gloves

Here is the procedure you should follow:

  • Start by wearing safety gloves for your safety.
  • Use kerosene to lubricate the tip of the tapered file to make it smooth and avoid friction.
  • Place the tip of the file on the target area of the glass where you want to create a hole.
  • Gradually turn the file while placed on the glass. Do this continuously for several minutes until you discover a hole in the glass.
  • You can rotate the file clockwise and anticlockwise several times until the glass is fully punctured.

You can lubricate the file using kerosene several times when the file tip dries up.

4. Duct tape and lighter

If you had a naughty childhood, there is a chance you tried this in your home garage. This technique is taught in school, especially to 7th-grade kids. It involves heating the target area while keeping the surrounding area cold to avoid cracking.

You will require these items:

  • Duct tape
  • Lighter
  • A glass of cold water
  • Nail
  • Ball peen hammer

Follow these steps to create a hole in a glass bottle or flat glass:

  • Use duct tape to cover both sides of the target area where you want to make a hole. For a glass bottle, cover the bottom with duct tape.
  • Pour cold water on the area surrounding the target area. This helps cool the surrounding areas.
  • Use a lighter to heat the target area where you want to create a circle until it becomes extremely hot.
  • When the target becomes hot, use a nail and a hammer to create a hole in the glass. If it does puncture in the first trial, repeat this process.

5. Carbide masonry bit with oil

You can also use a carbide bit to puncture a glass, but you will need to be gentle not to apply too much pressure on the glass. This method works well with glass bottles, but you can also use it on flat glass.

You will require the following items:

  • Carbide bit
  • Oil
  • Water
  • Duct tape (for flat glass)

Using Carbide Masonry to Drill Glass Bottle

  • Fill the bottle with water to reduce vibrations when creating a hole on the glass surface.
  • Lubricate the carbide bit using oil, and press it gently against the glass to create a hole.

Using Carbide Masonry to Drill Flat Glass

  • Use duct tape to cover the surrounding area of the target area, at least a 5-inch radius from the central point. The tape reduces vibrations in the non-working area to prevent cracking.
  • Oil the bit and press it gently and firmly against the glass to make a hole.

Safety Measures When Drilling a Hole in Glass

You need to take caution when making a hole in a bottle or flat glass since broken glass pieces can cause injuries.

When creating a hole in a glass bottle, you need not to worry since the punctured piece of glass will fall inside the bottle. Add some water to the bottle, and flush out the punctured glass into the garbage.

For flat glass, you should place a piece of cloth beneath the glass you want to drill. The cloth will trap the punctured glass pieces, which you can fold and dispose of into the garbage. If the glass pieces find their way into the floor or walking area, they can cause injuries and even bleeding.

FAQs about Making a Hole in a Glass without a Drill

Can you drill a tempered glass?

No. You cannot drill tempered glass, since it will shatter when the drill gets into contact with its surface. You can only drill and cut tempered glass into the desired sizes before the tempering process. Once it is tempered, it becomes impossible to drill the surface.

Why does glass shatter when making a hole?

Glass may shutter due to vibrations when drilling a hole on the surface. Also, if you are pressing the drill or carbide drill too hard on the surface, it will likely crack and shatter into pieces. Be gentle when drilling. You can use duct tape to cover the surrounding area to reduce the vibration. Also, you should oil the drill bit to lubricate the area, and reduce friction when drilling.

How do I dispose of broken/punctured glass pieces?

After drilling a hole in the glass, you should place the broken glass pieces in a piece of cloth or plastic bag and wrap them in an old newspaper. For large glass pieces, you should wrap them in two layers of plastic bags, and label them as “broken glass” before disposing them of in the garbage cart.