The complete guide to pipe insulation

15 Jul.,2024

 

The complete guide to pipe insulation

&#; You can save £315 per year by insulating your hot water tank

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&#; It&#;ll save you 0.5 tonnes of greenhouse gas emissions per year

&#; This is one of the cheapest ways to cut your energy bills 

Getting your pipes insulated is a quick and easy way to reduce energy bills just that &#; while cutting your carbon emissions at the same time. Other popular measures are spray foam insulation, though this costs a little more.

When it comes to pipe insulation though, there&#;s good news: it&#;s cheap, and you can do it all yourself.

If you&#;re insulating your pipes, you should really insulate your hot water tank and radiators as well &#; otherwise, you&#;re just leaving energy savings on the table.

We&#;ve got you covered on that front too &#; and if you&#;re after spray foam insulation, just fill in this quick form to see how much it would cost you.

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Answer a few quick questions, and our trusted installers will send you bespoke spray foam insulation quotes &#; for free.

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What is pipe insulation?

Pipe insulation refers to a foam tube that goes around the exposed pipes travelling from your boiler to your hot water tank. It can save you money, and help stop your pipes from freezing.

And what&#;s more, you can do it all yourself.

All you have to do is measure the pipe, buy the right size of tube from your chosen home improvements shop, and fit it around the pipe.

To do this, just open the tube where it naturally splits, and carefully place it around your pipe. Push on either side of the split, and it should stick together to form an unbroken seal.

You&#;ll need to cut the tubes to match them to the length of your pipes. Do this with a handsaw, and take the proper precautions.

When you encounter a bend in the pipes, cut a tube diagonally. Place the two parts of the tube on either side of the bend, and push them together. You can then secure them in place with duct tape.

How does it work?

The foam tube will stop the heat coming off the pipe from escaping, meaning your hot water will stay warmer for longer.

This will save money on heating your water, which adds up over time.

It will also help prevent your pipes from freezing, by keeping them warm &#; but insulation isn&#;t the be-all and end-all in this case.

To stop a disastrous pipe freeze, you should also keep your heating on at all times. If you&#;re still concerned about this prospect, contact a professional.

Pipe insulation cost

It generally costs £1.75 per metre to insulate a pipe. All you need to do is buy the right size of foam tube, and fit it round the pipe yourself.

This typically adds up to £20 to insulate the primary pipework &#; that is, all the pipes between your hot water tank and boiler.

And it&#;s worth the cost. Pipe insulation will save you about £3 per year on your energy bills, according to the Energy Saving Trust (EST).

This means you&#;ll have paid off the cost in less than seven years &#; and if you sell the property, it&#;s always great to be able to tell prospective buyers about your reduced energy bills.

What type of pipe insulation do you need?

There are various materials used in pipe insulation, but mineral and glass wool, fibreglass, and foam are the most popular types.

These have different benefits and drawbacks, but which one you should get largely depends on the location, temperature, and size of your pipes.

Speak to an expert at your home improvement shop of choice, who&#;ll be able to give you advice for insulating your specific pipes.

Hot water tank insulation

It also makes sense to insulate your hot water tank. After all, you don&#;t want any of your precious heat getting away.

And there&#;s no point in your hot water tank&#;s room being warm and toasty, at the expense of the rest of your home.

How does insulating a hot water tank work?

It&#;s as easy as slipping on a jacket &#; because that&#;s what it is. You insulate your hot water tank by coating it with a jacket, which you can buy at numerous home improvement shops.

If you already have a jacket around your tank, measure its thickness. If it&#;s less than 80mm &#; which is the British Standard &#; we&#;d strongly encourage you to replace it with one that is 80mm.

Is it worth it?

Even if your current jacket is 25mm thick, buying an 80mm one can save you £70 per year, according to the EST.

And an 80mm thick jacket, which meets British Standard requirements, only costs around £16.

And if you don&#;t have a jacket on your hot water tank, or any insulation on the pipes which connect it to your boiler, installing this yourself will typically save you £315 per year

Plus, it&#;ll save 510kg of CO2. For the average person in the UK, that&#;s an 8% reduction of your carbon footprint &#; all while saving money at the same time.

Hot water tank insulation grants

Hot water tank insulation was one of the energy-saving home improvements covered by the Green Homes Grant, which could&#;ve saved you two-thirds of its cost.

Unfortunately, this government scheme was chronically mismanaged and finished a year early, in March .

Radiator insulation

Insulating your radiators is another easy, cheap way to save money on your energy bills and cut your carbon emissions by making sure heat doesn&#;t leave your home.

Here&#;s how to do it.

How does insulating a radiator work?

For radiators on external walls, you can buy reflector panels to stick to the wall.

These panels stop heat from escaping your home, bouncing it back into the room instead.

They also work a lot better than putting insulation directly on your radiator, which won&#;t as much spread heat around your home as potentially set it on fire.

If you have external solid walls that aren&#;t insulated, reflector panels could benefit you enormously.

You should also consider applying for a Green Homes Grant, which could save you two-thirds on the cost of getting them insulated.

Is it worth it?

Reflector panels should only cost only £6-7 at a home improvement shop, and will typically allow you to save £25 per year on your energy bills, according to the Energy Saving Trust. 

So yes, it&#;s absolutely worth it.

Summary

Insulating your pipes, hot water tank, and radiators makes financial sense, and it&#;s good for the climate.

It&#;s a win-win in any circumstances, and with the Green Homes Grant coming into force later this year, there&#;s never been a better time to insulate your heating system.

You&#;ve read all the information you need, so get cracking on keeping all your heat where it should be: in your home.

And if you&#;re tempted by the idea of spray foam insulation, just fill in this form, and see how much you can get it for.

Insulation - save money and conserve energy

Insulation &#; save money and conserve energy

MoneyMagpie team 7th Sep

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The facts and figures in this article were correct at the time of publication.

With gas and electricity prices set to soar thanks to the current crisis and another cold winter not far away, all of us want to cut our energy costs as much as we can.

By making sure your home is properly insulated you can make your energy usage much more efficient and save yourself serious money!

Switch your supplier and save on your energy bills

All the insulation solutions in this article will save you a lot of money in the long run. Also, there are plenty of grants and discounts available to help you with the initial set-up costs &#; and the good news is that you don&#;t have to be on benefits to qualify.

N.B. All the savings per year referred to in this article are estimations made by the Energy Saving Trust.

 

Wall insulation

Cavity wall insulation saving: up to £500 a year

Up to a third of the heat lost in your home escapes through the walls. Cavity insulation cuts this heat loss down dramatically, and could save you anywhere from £145 in fuel bills (if you live in a mid-floor flat) to £500 a year (if you live in a detached home).

If your house was built after the s, you probably have cavity walls. This means you&#;ll have a small air gap between the two layers of your property&#;s external walls.

You could save a small fortune annually by getting it filled &#; adding up to hefty savings over the years (and far less CO² emissions).

What does cavity wall insulation involve?

Professionals can be hired to install the insulation, following a full assessment of your home to make sure it&#;s suitable. The process involves drilling small holes in the external wall and then piping the insulation through. The holes are filled to match the wall afterwards. Depending on the size of your house, the work should take between two and four hours to complete and won&#;t cause any damage to your property at all.

This insulation should stop all the hot air escaping and make your home feel a lot cosier. Visit the National Insulation Association&#;s website to search through registered installers in your area.

How much does it cost?

Again, the size of your home will determine the cost. It can cost as much as £1,000 for a mid-floor flat and £4,600 for a detached house. The good news is, all households &#; regardless of income &#; are entitled to grants for home insulation, which could cover the entire cost. To find out how much you could claim, contact your energy supplier.

 

Solid wall insulation saving: up to £710 a year

If your home was built before you&#;re likely to have solid walls, which unfortunately lose even more heat than cavity walls (around 45% of your heat will be lost through them!)

Although the initial costs are steep, resolving the problem will save you lots of money in the long run.

It&#;s important before installing wall insulation that all walls are damp free and that there&#;s a reliable source of ventilation. This is so that the building does not suffer from increased levels of moisture in the air which leads to mould and damp problems.

What does solid wall insulation involve?

There are two types of solid wall insulation:

1. Internal wall insulation can be done in two ways. The first is by using &#;flexible thermal lining&#; &#; a roll of insulation usually made of 10mm thick latex which is used to line the walls. The walls can then be decorated with emulsion, wallpaper or even tiles over the top of the lining.

The second way is effectively &#;double glazing&#; your walls with 90mm thick &#;rigid thermal boards&#;. These usually consist of plasterboard backed with an insulating material, and are fixed to the wall leaving a small gap in between to trap warm air. This will then reduce the amount of heat that can pass through the wall to the outside.

2. External wall insulation involves adding an insulating, 50-100mm weather-proof layer over the outside of your walls, usually with decorative cladding over the top (to suit the style of your house, whether it&#;s Victorian, Edwardian, Georgian or whatever).

External insulation is often installed where there are severe heating problems or some other form of external wall repair work needs to be carried out, allowing the insulation to be done at the same time.

As this method changes the appearance of the house, it&#;s possible that you may need to get planning permission before any work is started. Contact your local council for more information.

How much does it cost?

Internal wall insulation is the cheaper option, costing up to £7,500 for a three-bed semi, but it will temporarily affect the internal decoration of your home, and will make rooms ever so slightly smaller.

Installing external wall insulation is a lot more expensive, depending on the type of render and the condition of the walls. On average, external insulation for a typical three-bedroom semi is likely to cost up to £11,000, according to the Energy Saving Trust.

The savings on your energy bill are comparatively small given the high outlay required. For a detached home, you&#;re looking at around £710 a year, while insulating that hypothetical three-bed semi will probably only save you about £410 on fuel bills.

 

Double glazing saving: up to £235 a year

What does double glazing involve?

Installing double-glazed windows means that air is trapped between two panes of glass, effectively creating an insulating barrier that reduces heat loss, noise and condensation.

The Energy Saving Trust estimated that installing A++ double glazing could see you better off by up to £235 a year, as well as save in the region of 405kg in CO² emissions.

How much does it cost?

Double glazing can be a bit pricey to install &#; you&#;re looking at around £7,500 for a typical semi.

With so many companies out there, it&#;s important to choose a reliable one. Although adverts in your local newspaper and flyers through your door may offer attractive prices, we suggest you search here for a FENSA (Fenestration Self-Assessment Scheme) registered window fitters in your local area.

After you&#;ve found local companies, get quotes from three or four of them. This will involve contractors coming to your house to assess what you need (they shouldn&#;t charge you for this). Once you have your quotes and have seen what each company can offer, you can make a decision on which to use.

If you can&#;t afford to have all your windows replaced, you could fit double glazing in the rooms that cost you the most to heat, while you save up to get the rest done. This will at least cut your energy bills down a bit.

Alternatively, you could look at getting secondary glazing installed. Secondary glazing consists of a sheet of plastic or glass fitted over the inside of the window that creates a mass of air that acts as insulation between the actual window and the extra glazing.

It is a less effective solution, but it is dramatically cheaper and can be used as a temporary solution. It may also be the only solution for listed buildings!

DIY options are available but you&#;ll likely save more money in energy bills if the fitting is done professionally.

 

DIY insulation

Loft insulation saving: up to £470 a year

If your loft is all bare joists and the odd forgotten Christmas decoration, you need to give it some TLC with a little DIY! Loft insulation is easy to do yourself, and with a quarter of heat being lost through an uninsulated roof, it&#;ll save you some serious money too.

What does loft insulation involve?

Loft insulation comes in rolls and should be laid across your entire attic floor, including around the loft hatch, to prevent heat escaping; in the summer it&#;ll help to keep the house cool, too.

In the UK, it&#;s recommended that you use at least 270mm (8in) of insulation to cover your loft, yet this differs with the product you choose to use &#; lay 270mm if you&#;re using glass wool, 250mm for rock wool and 220mm for cellulose. The easiest way to do this is to put insulation between your ceiling joists and then another layer over the top. Sticking to these guidelines will mean that you will save up to £470 a year on your energy bills if you live in a detached house, and up to £260 if you live in a mid-terrace.

SAFETY: Always remember that you should wear a mask, gloves and a long-sleeved jumper when you&#;re laying the insulation rolls, as loft insulation is pretty horrible stuff!

How much does it cost?

Most insulation rolls are already marked so you can cut them to the perfect size and fit them between the joists.

Once you&#;ve filled between the joists, you can put a second layer over the whole area.

While you&#;re up there, you could consider insulating your pipes at the same time. All you&#;ll need to do is get some pipe lagging which is flexible and easy to install.

As with cavity wall insulation, everybody &#; regardless of income &#; is entitled to a government grant, meaning you might not have to pay a penny. Contact your energy supplier to see what help is available to you.

 

Hot water tank insulation saving: up to £250 a year

Aren&#;t you glad of your cosy coat now it&#;s coming up to winter? Make sure your hot water tank has something similar.

What does hot water tank insulation involve?

By fitting a British standard &#;jacket&#; of at least 80mm thickness, as well as pipe insulation, you&#;ll cut heat loss from your tank and save up to £250 a year, according to the Energy Saving Trust. Fitting one of these jackets is a straight forward DIY job and, as well as being kind on your pocket, you could also save around 175kg in CO² emissions a year.

How much does it cost?

Most jackets cost about £18, while primary pipe insulation will cost an extra £18. You can easily fit both these yourself. So you spend £36 on insulation for your hot water tank and pipes and gain back seven times that amount in savings over the course of the year!

You can apply for a grant of up to £40,000 to help boost your home&#;s energy efficiency here.

Floor insulation saving: up to £150 a year

If you have some nice timber floors in your home but hate the draught they create then its well worth insulating under the floorboards. Not only will this increase your comfort, but it can save you some money too. Approximately 15% of heat is lost through our floors and even insulating between your floorboards and the carpet will help save up to £150 a year on your heating bills.

It&#;s possible to insulate the floor yourself, as it&#;s a pretty straightforward job and there&#;s plenty of help online. If there&#;s a multitude of pipes and wires under your floors, however, you may feel better having a professional do it.

The good news is that you don&#;t need to insulate all the floors in your house &#; just the ground floor will do. You need to make sure when doing the job that there&#;s sufficient ventilation under the floor. If there isn&#;t, then condensation will form and the floorboards will rot. So don&#;t block up the underfloor airbricks in your outside walls.

This job obviously involves taking up the floor, so it isn&#;t a quick solution. Floorboards need to be lifted so that pieces of insulation cut to size can be fitted in the bays between the floor joists. This insulation can be held up with nails tapped into the joists or with netting attached to the joists underneath it.

The most common materials used for this type of insulation are fibreglass, mineral wool and cellulose, although synthetic plastics and polystyrene foams are also used.

Another way to prevent against draughts through the floor is to fill in between the gaps in the floorboards and around the bottom of skirting boards with a silicone sealant.

Carpeted floors do provide a lot more insulation than bare wood &#; the thicker the carpet, the warmer the floor will be. In order to insulate further, though, a good-quality, thick cushion pad under the carpet will help.

How much does it cost?

Insulating under your floorboards can cost up to £4,300 and will only save between £60 a year in energy bills if you live in a terrace and £155 if you live in a bungalow. However, you will have the additional comfort of having warm floors under your feet! Doing the work will cause some temporary disruption to your home but it&#;ll definitely be worth it to have warmer rooms.

 

Draught-proofing saving: up to £50 a year

These are incredibly easy to fix and will improve your comfort around your home, as well helping you out with your bills! Draughts around the home can cause illnesses in the elderly and children, so the small amount of work it takes to fix them will really pay off.

What does it involve?

Tiny gaps around the sides and bottom of your doors, windows, letter boxes and cat flaps let cold draughts in and warm air out. The gaps can be filled in with plastic or foam sealants and brush strips that you can easily install yourself.

How much does it cost?

Draught excluders can be found at any DIY or hardware store &#; even Argos stock simple solutions.

 

Government grants

If all of this is sounding good but beyond your budget, don&#;t worry &#; financial assistance is available. The government, energy suppliers and local authorities can all provide grants to help you out.

Some government schemes are only available to households on certain benefits, such as income support, or to those over 65. There are, however, discounts and subsidies around even if you don&#;t fall into those categories. One important thing to know is that this scheme will only exist as long as the funds are there, so you may have to act quickly.

To find out how much you&#;re entitled to, read all about grants and how to get them in our article, Green savings and grants galore or visit the Government Grants website.

The government has also set up the &#;Green Deal&#;, an initiative designed to encourage home owners and businesses to use more green technologies. The great thing about this is that you won&#;t be expected to pay any upfront costs. Click here for more information about the Green Deal and how it could benefit you.

 

Top tips

  • Get thermal curtains &#; they make it virtually impossible for heat to escape. You can make them yourself by lining your curtains with an insulating material. A really cheap way of doing this is to sew a cheap PVC shower curtain (they only cost about a fiver) to your existing curtains, and then sew some lining over the top. For added insulation you can replace the shower curtain with foil insulation from Wickes.
  • Don&#;t draw the curtains over the radiator. This will channel the heat up the curtains and out through the glass. Tuck the curtains behind the radiator or have the excess length taken off.
  • Draw your curtains at dusk to provide extra insulation to the room.
  • With all of these methods, if you don&#;t have a huge budget, go for products roughly in the middle of the price range. That way you won&#;t have to spend an absolute fortune but you&#;ll still be able to save a substantial amount of money.
  • To find builders or companies who can install wall insulation or double glazing, search online at Yell.com using the keywords and your postcode &#; easy!

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