Knowledge Builders

should water pipes be insulated

by Miss Brenna Turner III Published 2 years ago Updated 2 years ago
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If there are uninsulated water pipes in or near exterior walls, they can burst in freezing weather, which can be catastrophic. Having the insulation done during new construction of a home, during other work on your water heater or pipes, or insulating the pipes yourself, is well worth the effort.

What is the best insulation for hot water pipes?

To insulate exposed pipes, you'll need the following:

  • Rag and mild cleaning solution.
  • Tape measure.
  • Fiberglass or foil insulation wrap or tubular pipe sleeves.
  • Duct tape.
  • Plastic (for fiberglass wrap)
  • Gloves, pants and long sleeves (for protection if you're using fiberglass wrap)
  • Utility knife or box cutter.

How to insulate your hot water pipes?

There are several strategies you can use to insulate water pipes:

  • Insulating them with strips of pipe wrap
  • Using foam pipe sleeves
  • Adding wall insulation
  • Using faucet covers on outdoor spigots
  • Installing frost-proof outdoor spigots
  • Insulating gaps where pipes penetrate walls

Are galvanised steel pipes suitable for supplying hot water?

While galvanized pipe is allowed in most building codes, it has corrosion issues when used for hot, softened water service. The low mineral content in soft water is desirable for reducing scale build-up, but detrimental to corrosion resistance.

Do hot water pipes freeze faster than cold water pipes?

The Mpemba effect is a process in which hot water can freeze faster than cold water. The phenomenon is temperature-dependent. Correspondingly, why do hot water pipes freeze before cold? The Mpemba effect is the observation that warm water freezes more quickly than cold water. Hence the faster freezing.

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Is it worth insulating cold water pipes?

Insulating cold water pipes can also prevent the pipes from sweating due to moisture condensation. Moisture control is critical to thermal efficiency and chilled-water systems. An excess of condensation can lead to energy loss, higher operating costs and even poor IAQ due to mold and mildew.

Do domestic water lines need to be insulated?

The 2016 Plumbing Code, Section 609.11, requires domestic hot water pipes to be insulated. It also specifies that pipe insulation must be at least the thickness of the pipe diameter, while pipes larger than two inches must have at least two inches of pipe insulation.

Should pipes in walls be insulated?

If pipes must be run in exterior walls, the pipes should be insulated. To further protect the pipes from heat loss, the wall cavity containing the pipes should be air sealed by caulking or foaming all seams between the back wall of the cavity and the framing and by sealing any holes through the framing for the piping.

Should copper water pipes be insulated?

Copper pipe insulation is a critical part of a home's plumbing system. Even if you do not have copper pipes in your home, pipe insulation remains essential because it protects pipes from freezing, cuts down on energy costs and decreases the chance of water damage from condensation.

How do I insulate my main water pipe?

1:073:26How to Insulate Pipes: Weatherization Tips | The Home Depot - YouTubeYouTubeStart of suggested clipEnd of suggested clipTo apply the fiberglass pipe wrap unroll it with the foil side facing upwards slightly overlap theMoreTo apply the fiberglass pipe wrap unroll it with the foil side facing upwards slightly overlap the wrap as you go to ensure the pipe is fully covered. Even around corners and complex angles.

Do you need to insulate plastic water pipes?

Regardless of the type of plastic pipe used, insulation is essential. Plastic pipes have many advantages, but just like metal pipes they must be protected against energy loss. In refrigeration and air-conditioning applications they also must be protected against condensation.

How do I insulate my pipes for winter?

Insulate pipes in your home's crawl spaces, attic, and garage. ... Wrap pipes with heat tape or thermostatically controlled heat cables. ... Seal leaks that allow cold air inside, near where pipes are located (i.e. around electrical wiring, dryer vents, other pipes), with caulk or insulation.More items...

Will foam pipe insulation keep pipes from freezing?

While insulated pipes are better than pipes with no protection, they're not the best solution to achieve full frost prevention during the winter months. In fact, pipes in unheated areas such as basements, garages and attics are still at risk of cracks and bursts even with proper pipe insulation.

Do PEX hot water lines need to be insulated?

Yes, insulation is an essential part of installing PEX piping, as the lack thereof could lead to unfortunate outcomes. It is more resilient against fluctuations in temperatures than other commonly used materials. It's flexible pipes and does not act as a conductor for heat and cold as easily as metal materials do.

Should water pipes in attic be insulated?

The code requires water distribution pipes in “any area subjected to freezing temperatures” to be protected by insulation or heat, and specifically lists attics and crawl spaces as examples.

Should copper pipe be wrapped?

Copper is naturally corrosion resistant to most soils and underground environments. Wrapping or sleeving the copper tube in an effort to provide an additional layer of protection, while well intended, can lead to failure due to improper sleeving or wrapping practices.

What's the best insulation for copper pipes?

Rubber Insulation This insulation is the typical go-to option for copper pipes because it can contract and expand according to temperature changes. It is also extremely durable and affordable. It's easy to install rubber insulation, and it prevents heat loss from hot water pipes as well.

Should you insulate pipes underground?

All newly installed water pipes will need to be insulated before they are buried. It's a requirement stipulated by the local water authority. The leading product for underground use is Armaflex Tuffcoat.

Should you wrap copper pipes?

Copper is naturally corrosion resistant to most soils and underground environments. Wrapping or sleeving the copper tube in an effort to provide an additional layer of protection, while well intended, can lead to failure due to improper sleeving or wrapping practices.

Is it worth insulating hot water pipe?

Overall, adding insulation to your pipes reduces the risk of freezing, in turn reducing the need for expensive repairs. In the end, your house is safer, you are not inconvenienced by a loss of hot water, and your budget is not suddenly cut by repair fees.

How do you insulate outside water pipes from freezing?

Pipe-wrap is simple to install and recommended for insulating small lengths of pipe....Pipe-wrap InsulationAttach the loose end of the insulating wrap on one end of the pipe.Wrap it around the pipe in spiraling loops, making sure to cover the entire pipe.Cut the end off once sufficient insulating wrap is in place.

Why do you need to insulate your water pipes?

There are several reasons you’ll want to insulate your cold water pipes if you haven’t already. First, insulating cold water pipes helps protect against freezing. Second, because cold water pipes absorb heat, during the winter they will draw heat from the space around them, assuming this space is insulated.

Why do cold water pipes need insulation?

This condensation collects and eventually drips on the floor, which over time can leave a water stain. Insulation prevents condensation from forming on your cold water pipes and keeps them cool and dry.

Can you insulate hot water pipes?

Insulating your water pipes is an inexpensive way to prevent this from happening. And most people already have their hot water pipes insulated already.

Do hot water pipes freeze?

Hot Water Pipes. Hot water pipes aren’t likely to freeze, since there’s hot water traveling through them on a regular basis. But still, you want the hot water you’re paying to heat to retain as much heat as possible on its journey from the hot water heater to your shower, dishwasher, or other fixture. Insulation helps you keep your water hot!

Can water pipes freeze in the winter?

Water pipes in uninsulated or unconditioned spaces such as an unfinished basement or uninsulated crawl space can easily freeze in the winter. Frozen pipes can be damaged beyond the point of repair, which means you’ll be in for an expensive replacement. Even just repairing frozen pipes can get expensive.

Why is it important to insulate hot water pipes?

Pipe insulation reduces the chance of frozen pipes in cold climates and eliminates condensation in all climates. Moisture condenses on cold , hard surfaces. If your cold water pipes aren't insulated, they are probably providing a condensing surface for moisture in your basement air. Insulating the hot waters pipes in your house is something ...

What is insulation in water?

Insulation is simply a material with above average resistance to thermal energy movement. The water comes out of the ground below 50°F into a winter environment that could be below 0°F. Wrapping those cold water pipes would keep what heat energy the water possessed in place, protecting against freezing.

How to prevent condensation in pipe?

The key for preventing condensation is to be sure that the pipe is insulated and that the insulation is sealed along the seams. Moisture-laden air must be kept from contacting the pipe surface. The pipe insulation should be a vapor-impermeable foam with all the seams and edges taped tight.

What is the temperature of groundwater in Maine?

From USGS groundwater temperature data, we know that groundwater temperatures in Maine are generally below 50°F.

Is cold water a condensing surface?

Cold water pipes are a condensing surface for moisture in the air. Lastly, condensation concerns can be alleviated with pipe insulation. (Or rather, the possibility of condensation would be gone — you’re free to remain concerned.) Basements and crawl spaces are embedded in damp soil, surrounding the permeable concrete with moisture.

Can a basement water pipe freeze?

If the basement or crawl space has uninsulated walls (and really, you should insulate your basement walls ), insulated cold water pipes would be less prone to freezing in cold climates. If the basement is conditioned space, an insulated cold water pipe won’t absorb heat.

Can copper pipes freeze in Maine?

With winter temperatures routinely dipping below 0°F, it’s no surprise that cold water pipes can freeze.

Why do we need to insulate water pipes?

Insulating water pipes is a key element to any efforts to winterize the plumbing in the home . Insulating water pipes can also save money on energy costs by preventing hot water pipes from losing their heat to the surrounding air.

Where are water pipes insulate?

These are located in exterior walls, unheated garages, the floor cavities above unheated crawl spaces, unheated attics, etc.

Why do cold water pipes puddle?

When exposed cold pipes contact warm, humid air, condensation can form on the pipes. This condensation may drip and puddle on floors, or it may contribute to overall high humidity levels, especially in basements. Insulating the cold water pipes can prevent this condensation.

What are pipe sleeves made of?

Most foam sleeves are available in 6-foot lengths so that you can cover a lot of ground quickly. The sleeves can be made of either foam or rubber insulation , and both are available in self-sealing styles.

Why does my faucet split?

When these exterior metal faucets are exposed to frigid winter temperatures, water trapped inside the faucet can expand and burst. This causes a split in either the faucet itself or the pipe just inside the walls of the home. If you are lucky, it will be the faucet that bursts and leaks water outside the home.

Can water pipes freeze in cold weather?

As many homeowners in cold climates know all too well, water pipes located in exterior walls can be highly susceptible to freezing during cold weather. This is why standard construction practice in these climates is to run water pipes through interior walls or floors, if possible.

Do frost proof faucets insulate?

Although they do not actually insulate, installing special frost-proof faucets is a good option for homeowners in colder climates. These faucets are designed with a special valve stem that prevents water from being trapped inside the faucet, where it can freeze, expand, and burst the pipe.

How thick should insulation be for a gas water heater?

On gas water heaters, insulation should be kept at least 6 inches from the flue. If pipes are within 8 inches of the flue, your safest choice is to use fiberglass pipe-wrap (at least 1-inch thick) without a facing. You can use either wire or aluminum foil tape to secure it to the pipe.

What is used to secure a fiberglass pipe?

Acrylic or duct tape, or cable ties, to secure the sleeves—or aluminum foil tape or wire to secure the fiberglass pipe-wrap

Benefits of Hot Water Pipe Insulation

Nobody likes waiting for minutes on end for the shower to heat up before jumping in. When you decide to insulate your pipes, you’ll lower the amount of time it takes to heat your shower up to your liking.

Hot Water Pipe Insulation

Installing hot water pipe insulation can be done to your existing pipes without too much disturbance. You’ll see the benefits occur almost immediately. We believe that the cost of insulating the pipes is greatly worth the benefits.

Contact Estes for Hot Water Pipe Insulation

For water pipe insulation that you can trust, contact Estes Services today. Our team can provide your home with the attention and respect that you deserve, no matter the size or scale of the project.

Why is it important to insulate your water lines?

One of the biggest reasons used to promote insulating your lines is so that your hot water heater doesn’t have to work as hard &/or the hot water will arrive at your tap faster. Well I hate to say this but someone needs to study up on hydrodynamics. In order for hot water to arrive at the tap it basically must push all the water already in the line out.

How to prevent water lines from freezing?

To help prevent the water lines from freezing: In unconditioned areas make sure they are insulated, protected from drafts/ winds & if need be install heat tape. To help prevent condensation from forming on cold water lines: This is generally limited to very high humidity areas coupled with cold incoming well water.

How long does it take for a hot water line to reach ambient temperature?

The catch is that time period is limited. Just to use a simple example, let’s say that an uninsulated line reaches ambient (room) temperature in 10 – 15 minutes.

Do pipes expand when heat gain?

There is one other main selling point that some like to add to the “savings” & that is reducing the noise as they expand due to the heat gain. While it is true that pipes do expand as their temperature increases you have some other issues that you need to address & not try to muffle or hide if this is ongoing.

Should underground lines be insulated?

Underground lines: I really shouldn’t even have to mention this but if you are building new or remodeling – if you have lines running under a slab they should be insulated & protected to help extend their life.

Is it going to happen if copper lines run through basements?

Yep it isn’t going to happen. Yes I do know where some people get this idea, and that is because they have copper lines that seemingly run for miles in their super cold basements. As the water is rushing through the lines it is giving up a bit of its heat.

Does insulating water pipes raise water temperature?

“Insulating your hot water pipes reduces heat loss and can raise water temperature 2ºF–4ºF. ” Really, just how exactly is a material made to help resist the flow of heat outward or inward magically going to heat the water aka raise its temperature? Yep it isn’t going to happen

Why is it important to insulate the hot side of a water pipe?

Insulating the hot side will assist in delivering hot water to fixtures quicker and the water inside the pipe cools at a slower rate. The cold water side may condensate in the summer months contributing to damp crawl space conditions.

What type of insulation is used for PEX piping?

Foam is usually the recommended type of insulation for PEX piping, as it meets the flexibility levels that such material demands. Since PEX is commonly used with curved positioning instead of connection joints, the insulation material needs to be flexible.

What is continuous length insulation?

Continuous Length Type: This type of insulation can be described as a full-length tube with no openings of necessitated closures, which offers thorough and even insulation across the entire length of the PEX pipe. While this would certainly be beneficial, this is more commonly used during the building’s construction phase, as it can be slipped over the PEX piping before it has been installed within the building.

What is the standard for PEX piping?

According to the American Society for Testing & Materials, the standard for PEX piping is CTS , which is also the standard for copper piping and CPVC. PEX piping can be insulated with the same foam insulation sized for copper, commonly found in home improvement stores.

Why is PEX piping important?

Insulating PEX piping also decreases the risk of potential functional failures due to moisture condensation and promoting energy efficiency . Limiting the exposure risks and insulating PEX piping reduces water pipes’ chances of bursting or leaking and causing tiresome and frustrating outcomes, which may be costly to repair, not to mention the potential necessity for piping replacement.

How long is PEX pipe?

PEX piping is generally available in standard sizes ranging from ¼ to 2 inches, at a length of 50 to 200 feet. It’s crucial to calculate the pipe's size with the amount of insulation that will be necessary.

What is PEX piping used for?

PEX piping is used in nearly all new home construction and plumbing pipe replacements done today. Insurance companies report that over 250 million homeowners annually have property damage from busted water pipes, many caused by freezing temperatures.

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