The Incredible Advantages Of Liquid Screed Over Sand And Cement

When you are undertaking any sort of building contract, whether it is a new build or restoration work, when you lay a new concrete floor it will need screeding. For many years, sand and cement has been the traditional sort of screed that has been used, but it has many disadvantages.

Not the least of these is that it takes a lot of man hours to do it because the whole thing is carried out by manual labour. First, you have to mix the sand and cement in a cement mixer. Then it has to be transported in a barrow to the floor area and tipped out, and then it has to be spread across the concrete surface manually using hand tools. Meanwhile, more sand and cement is being mixed in the mixer. If you have a large area of flooring to cover, the whole process can take forever. Well, perhaps not forever, but nonetheless a very long time.

Fair enough, some sand and cement mixes are now being delivered to site ready mixed, especially for larger areas, but even so the process is very long-winded.

Hence the development of liquid screed, which is also delivered to site ready mixed, but is then poured on to the concrete substrate using a pump. The whole process is amazingly quick compared with sand and cement: at Liquid Screed we have laid 100 square metres in 45 minutes and have been known to cover up to 2,000 square metres in a single day. Compare that with doing it by hand!

Not only that, liquid floor screeding in London has so many advantages over sand and cement, especially when you are laying underfloor heating. It totally covers the heating pipes without leaving any gaps, so that the heat is spread evenly in the room above. Furthermore, a liquid screed has almost double the heat transference capabilities of sand and cement, so it requires less energy to produce the same level of heat in the room. This means that there is an ongoing benefit to the environment and also to the occupier who will spend less on heating.

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Key Advantages of Liquid Screed

While screeds have been used for a long time in the construction industry to be applied over structural elements to provide a smooth and level surface, liquid screeds are a relatively new innovation.

As well as offering the same benefits as traditional screed, allowing floor finishes such as carpet, tile and wood to be installed, liquid screed comes with additional characteristics that make it a highly popular material in property renovation and new builds today.

Types of liquid screed

Liquid screeds can be referred to by a number of different terms. Pumpable screed, calcium sulphate screed, anhydrite screed and gypsum screed are all terms that can be used for liquid screed with some options denoting different qualities in the substance, such as drying times.

While each type may have its own advantages, liquid screeds in general offer a much thinner application and faster drying times compared to traditional screed options. Below are the overall pros and cons of using liquid screed.

Pros of liquid screed

Quick to pour and low labour costs due to the shorter time taken to lay the material

Depth can be modified to suit various requirements, including underfloor heating systems that need thin surfaces

Extremely level surfaces that come without bumps or inconsistencies compared to traditional screed options

Less prone to cracks and shrinking

Easily poured around heating systems and pipework so heat transfer is more effective

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What’s the Difference Between Concrete and Screed?

You might already know that screed is simply a thin layer of material laid over the top of a concrete subfloor. However, you may not know the difference between screed and simple ready mix concrete, used for hundreds of different purposes across the construction industry.

We’ve outlined some of the major factors to be aware of if you’re looking at using screed for your next project.

Components

It may be difficult to understand the difference between concrete and floor screeds because they are made up of such similar components; cement aggregates and water.

The basic process of making and applying these materials is also similar, in that cement and water when mixed forms a substance that can be used in combination with sand and aggregates to create a hardened mass that is extremely durable and high strength.

 Different applications

The major difference is in the intended use of each material and the quantities of components used, such as aggregates, to create different effects. Concrete is extremely durable and high strength and is used across the construction industry for structural purposes in several different types of buildings and external spaces, such as structural foundations, pathways, driveways, fences and paving.

On the other hand, a screed is typically designed for internal uses and has been used for decades on top of structural subfloor to provide a more even level on which various floor finishes such as tile, wood or carpet can be set.

(Note: Contact your supplier of liquid anhydrite screed in Northampton, Kettering or Milton Keynes for more information about the application of this liquid screed option.)

Screed types

Today, there are many different screed types. Traditionally, a screed would have been laid by shovelling in the screed mix and then levelling it with a screeding bar. However, liquid screed now allows liquid to be pumped and spread more easily, drying quicker and creating a perfectly level surface suited to underfloor heating.

Liquid Floor Screed Vs Sand And Cement

Liquid floor screed is being specified more and more both for new builds and renovations. Traditionally, a sand and cement screed in Shropshire has been used to level a floor surface so that the final flooring can be laid. It has to be said that sand and cement screed is still used quite extensively, but it is rapidly being overtaken by liquid screed. It is estimated that today between 20% and 25% of all screeds laid are now liquid screeds.

Liquid screed has several advantages over sand and cement screed, not the least of which is the speed of laying. Sand and cement screed has to be laid and levelled by a labourer by hand and this is painstaking work. It is also often mixed on site in a cement mixer and this can lead to variations in the consistency of the screed, although on larger sites the screed is now being delivered ready mixed, more often than not.

A liquid screed on the other hand is delivered to site ready mixed and is simply pumped into position by a pump. This is far faster than laying sand and cement screed, and contractors such as ourselves can lay as much as 2,000 square metres in a single day. In fact, it is reckoned that we can lay screed at around 20 times faster than sand and cement.

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The Benefits of Anhydrite Screeds

Liquid Anhydrite screed has become incredibly popular today. This flooring option offers many benefits on top of the general benefits that come with using screed to offer a consistent and smooth floor finishing.

Price

While pumped Anhydrite Screed (liquid calcium sulphate) is slightly more expensive than other options, such as sand and cement screed, the margin is not that considerable when considering the benefits that are achieved. Additionally, you can also make savings on the labour and installation cost because the process of pouring out the mixture is far quicker with faster drying times.

Underfloor heating

Are you looking for underfloor heating Peterborough solutions? With underfloor heating you typically need 30mm cover above UFH pipes. Anhydrite screed is effective at creating floor measurements of this depth and offers superior heat distribution and energy regulation compared to many other screed options.

Easily installed

Pumped liquid screeds – due to their consistency – are effectively self-levelling. This means that even though you must hire experts who are experienced with handling this material, the effect will almost always be perfect, with surface smoothness consistent across the entire floor area.

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How to Prepare Your Floor for Liquid Screed

One of the main reasons screeds are used today is that they are incredibly effective at levelling a floor surface so that it is completely smooth and achieving a certain finish. Screeds are also a perfect partner for underfloor heating systems, allowing heat to be evenly regulated and distributed.

If you are thinking about commissioning your own floor screed installation as part of your home renovation or commercial property build, you’ll need to consider how the floor is prepared so that the desired effect is achieved. Here’s what you need to know about preparing your floor for liquid screed.

Preparing the Floor

With liquid screeds of all types, it’s essential that the floor is prepared correctly so that the desired effect is achieved and there are no inconsistencies that could lead to cracking later.

The floor will typically consist of thick layers of insulation that the screed will lay on top of and its crucial that this whole structure is stable and strong before any screeding work is carried out. If any of the insulation boards are wobbly or uneven, this can massively impact the surface of your eventual floor and potentially the structural integrity of any kitchen fittings.

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The Reasons for Using Screed on a Concrete Floor

When it comes to laying the final floor surface in a new building, whatever that surface may be – carpet, tile, wood, stone, and so on – it is vital that it is laid on a surface which is as flat as possible. If you try and lay flooring on top of a cement substrate, that is asking for trouble: many materials such as tile and stone will be subject to movement and cracking.

This is why it is essential to lay a floor screed in order to level out the surface of the concrete. It won’t actually level the concrete itself, but what it will do is to fill in all the dents, gaps, holes, and so on that occur when concrete is drying.

Traditionally, a floor screed has been made from sand and cement and is laid and levelled by hand. This is a very lengthy process and there could often be variations in the mix because the cement was mixed on site, so one batch out of the mixer could well be different from the last one.

However today we are moving forward with the increasing use of liquid screeds. These are delivered to site ready-mixed and are installed through a pump. As you might imagine, because the screed is pumped into position, laying it is very much faster than laying a screed by hand: it is said that a liquid screed can be laid up to 20 times faster. Certainly, some providers can lay as much as 2,000 square feet in a day.

There are other advantages with liquid screeds too. One is that they are ideal for us with underfloor heating because they leave no gaps.

However, when a liquid screed dries it does leave a layer of laitance on the surface, and this needs to be removed by floor sanding machines in Cornwall before the final flooring is laid. If the laitance is not removed, the final flooring such as tiles or stone or wood will not adhere properly. Floor sanding machines in Cornwall can be used about 6 – 7 days after the screed is laid.

Liquid Screed for Floor Preparation in Derbyshire

When you are engaged in any sort of new build contract, or even one where the inside of a building is being gutted and new floors installed, the most important thing from the point of view of longevity of the flooring is that whatever the final floor surface is going to be, it is laid on a surface that is as level as possible.

If you want a floor that is going to last, which you presumably do, then you can’t lay it directly on to the concrete substrate. Hence why today we have screed, which is an intermediate material designed to flatten out all the dips, bumps, and dents in the concrete and provide a perfect surface for the final floor.

For many years now, a screed has been made from sand and cement and is then laid on the concrete by hand. This is a slow process and has some disadvantages compared with the latest technology which is the use of liquid screed.

Liquid screed, which is also known as anhydrite screed, is the best material for floor preparation in Derbyshire. This is made from sand and gypsum, much of which is recycled, and is laid in position using a pump. On any building site, time is money, and companies that specialise in liquid screed will be able to lay it at a rate of as much as 2,000 square metres a day, far faster than you could ever lay a screed by hand.

Because it is a liquid, it is self-levelling, and will usually easily achieve a surface level of SR2. However, you can also get a laser screed. This is not a product but is a process which uses lasers to level the screed surface and achieve a surface regularity of SR1 – and you can’t get better than that. This is the ultimate for floor preparation in Derbyshire.

Liquid screed has several other benefits. One of them is that it is ideal for use with underfloor heating because it completely fills the cavities and envelops the pipes, which ensures an even distribution of heat throughout the floor.  

Some Things To Consider When Laying Floor Screeds

At Liquid Screed we have ten branches across England and Wales, and we can lay liquid screed anywhere in the two countries. Liquid screed is being specified more and more by architects, especially when underfloor heating is being installed. It has several advantages over a sand and cement screed, not the least of which is that it IS a liquid.

Underfloor heating is often regarded as a luxury specification and only appropriate for high-end properties. Therefore, architects often opt for radiators in affordable housing, but it has been shown that underfloor heating used in combination with liquid screeds, also known as self-levelling compounds, is easy and quick to install for any type of property, especially if force drying is included.

Underfloor heating has several advantages over a radiator system, one of which is that the room is heated evenly throughout. The liquid screed totally envelops the heating pipes so there are no gaps, which can happen with a sand and cement screed. Liquid anhydrite screeds also are excellent at absorbing and transmitting heat with about double the conductive properties of sand and cement.

Read more information: Self-levelling compound in Cheltenham

Floor Screeding And Underfloor Heating From Liquid Screed

We are well-known as leading floor screeding contractors throughout England and Wales, and we provide a full floor preparation service from preparing the concrete substrate through to final sanding of the screed so that it is in perfect condition to receive whatever type of final flooring you are going to lay. We also install underfloor heating.

First of all, the concrete substrate must be cleared of any debris, and must be levelled off so that there are no high spots. If there are high spots, it affects the thickness of the floor screed. The building should also be windproof and watertight.

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The Reasons For Using Floor Screed In Berkshire

When constructing any form of flooring it is important that the final floor surface rests on something that is perfectly flat, because if it doesn’t the floor will not last very long. This is particularly true in the case of tiled floors as the tiles will crack if they are allowed to move. There are always imperfections in a concrete substrate, which will have dips and bumps in it, so whatever the final choice of flooring, you need to undertake proper floor preparation in Berkshire.

The correct procedure is to use a floor screed which can be laid in a number of ways. Traditionally, a sand and cement screed has been laid and this is trowelled into place by hand in order to make it as flat as possible. However, today, liquid screeds are being used more and more. They have several advantages over sand and cement screeds, not the least of which is the speed of laying.

Liquid screeds can be cement based or gypsum based, but either way they are delivered to site ready mixed and poured into place using a pump. Laying this type of screed can cover 100 square metres in 45 minutes, and up to 2,000 square metres in a day, saving a huge amount in labour costs over a sand and cement screed.

You might think that liquid screeds would take a long time to dry, but in fact they will be ready to walk on in 24 – 48 hours.

The screed can be bonded to the concrete substrate using a primer or it can be unbonded. In the latter case, a damp-proof membrane is laid on top of the concrete substrate before the screed is poured. Liquid screed is also excellent for use with underfloor heating since it makes 100% contact with the heating pipes and therefore ensures maximum transfer of heat.

When using anhydrite gypsum screed, a layer of laitance will form on the surface as the screed dries. Floor preparation in Berkshire needs to take account of this, as it is necessary to remove it by sanding before the final flooring is laid.

The Differences Between Sand And Cement Screeds And Liquid Screeds

Laying a floor screed is an important part of the process of producing the perfect finished floor because if you try to lay flooring direct on to the concrete substrate there can be all sorts of problems. This is true also in the case of precast concrete beam and block floors which can have a definite camber.

Traditionally, laying a floor screed in Chichester has been done using a mix of sand and cement which is hand trowelled to level it as far as possible. However, there are certain disadvantage with sand and cement screed, and this is now being rapidly overtaken by liquid screeds, some of which are cement based and others which are gypsum based. The latter are known also as anhydrite screeds, calcium sulphate screeds, flowing screeds, and floor compound.

The actual preparation of sand and cement screed used to be done – and still often is – on site using manual labour and a cement mixer. Inevitably the mix in each batch was a little different, and the labour involved is expensive. Today, ready mixed screeds with retardants added to delay the set are used more often.

However, floor compound in Chichester is being used much more today, as it comes ready mixed and is poured into place using a pump. Because it is in liquid form it is self-levelling and has great advantages when used in conjunction with underfloor heating because it completely covers the heating pipes and leaves no gaps, which is what almost inevitably happens with sand and cement screeds. That means that the heat in the room is spread evenly and there are no hot or cold spots.

Furthermore, floor compound in Chichester that is anhydrite based is inherently better at heat transfer than sand and cement screed, so it results in less energy being needed to produce the same amount of heat. In other words, a liquid screed has ongoing benefits for the environment because it needs less energy to run the heating.

In addition, liquid screeds can be laid very fast indeed. Some screeding teams can lay as much as 2,000 square metres in a day, saving a huge amount of labour.

The Benefits Of Liquid Screed Compared With Sand And Cement

Whether you are building a new home, building a factory or warehouse, or restoring an older building, it needs the floor to be perfectly level – whatever type of final floor surface is going to be installed. So you have a concrete substrate, but where you go from there is a matter of opinion.

For many years now we have had a sand and cement screed laid on the concrete, but it has some serious disadvantages. The material itself – sand and cement – is fairly cheap, but it has to be laid by hand, and that involves a considerable amount of labour. Many buildings today are having underfloor heating installed, which makes very good sense because underfloor heating has many advantages over a radiator system, not the least of which is that it is much cheaper to run.

However, a sand and cement screed laid by hand is never going to completely fill every void and totally envelop the heating pipes, which is what is needed for maximum efficiency of the heating system. Not only that, getting a sand and cement screed perfectly level is very tricky to do.

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The best Floor Compound for the Perfect Floor installation in Bristol

If you have plans to build a new floor or renovate an old one, it is important to invest in the best floor preparations. Most contractors rush the floor installation process only to deliver a shoddy job. For the best floor, the underfloor must be stable and level.

The quality of floor screed used determines the stability of the surface. However, you can achieve the perfect floor surface by using a floor levelling compound. 

Using Floor Compound for Perfect Floors
An established floor screeding contractor in Bristol will use the best quality floor compound to deliver an excellent project.

This floor compound is a special chemical mixture used to smooth uneven surfaces, fill dips, voids, cracks and gaps and eliminate any other underfloor issues.  If you install a thin floor cover such as vinyl, the uneven sub-layer will cause uneven floor surfaces. This is the last thing you would do for your project.

It is hard to achieve the ideal surface on most floors, and this is where this floor compound comes in handy. Floor levelling compound is versatile and works on multiple floors including terrazzo floors, sand/cement screeds, concrete, quarry tiles, stone, brick, timber floors and asphalt floors.

Before application of this self-levelling compound, the floor must be cleaned and primed.  This provides a firm surface to lay the liquid compound. At this stage, the contractor will also install underfloor heating pipes. 

The levelling compound dries fast, and this is where the skills of flooring professionals come in handy. It is important to identify the uneven surfaces before mixing the compound. This will make it easier to spread the mixture before it dries.

Working with an established contractor during screeding in Hampshire guarantees the best outcomes. These flooring experts have the tools and expertise to use the best floor compound and achieve excellent results. It is a simple and yet effective technique for an exquisite floor.

Bring the Best Out of Your Flooring with Expert FloorScreeding in Hampshire

If you plan to build a floor for any structure, it is important to invest heavily in floor preparation. It is advisable to look around for the best practices in floor installations and apply them in your project. The first of these practices is to use the best floor screed. The quality of the floor screed you use will make or break your flooring project.

The best Floor Screed in the UK 
For many years, builders and contractors have always used traditional and cement floor screed for all projects. However, advances in building technology have brought about new ideas in floor construction. Top among these ideas is the use of anhydrite floor screed.

This is an innovative alternative to traditional floor screed. The key ingredient in this product is anhydrous (dry) calcium sulphate. This is a by-product from acid production. Normally, this waste ends up in landfills across the country. However, innovative technology now makes it possible to use this in flooring.

Anhydrite floor screed is in liquid form, and this makes it easier to install and level.  When looking for a contractor in the area, you should inquire whether they can apply liquid floor screed for your project.

This liquid screed dries and cures faster. More importantly, it is faster to install, and with the right equipment, you will save a lot of money in the screed installation and levelling process.

Enjoy Full-Service Floor Screeding
When shopping for the best floor screeding contractor in Hampshire, you should go for the one offering full-serve screeding solutions.

In addition to supply and installation of floor screeding, the best contractor also can offer underfloor heating solutions, floor sanding and floor levelling. These professionals also have the right equipment for the job. They leverage the latest screeding technology, such as power screeding and laser screeding, to deliver the best floors.

Using the latest floor screeding technology and working with an experienced floor screeding contractor guarantees the best results.  A good flooring contractor delivers the project on time and budget.

The Many Advantages Of Liquid Screeds

Liquid Screed is the UK’s leading screed installer, so when it comes to screeding in Surrey it’s a no-brainer. Our highly trained professional screeders are about as fast as you can get, laying 100 square metres in 45 minutes, and as much as 2,000 square metres in a day. Although they are fast, they will never cut corners because they take pride in producing a job that is nothing less than perfect.

Because time is money on any contract, the faster that you can get your screed laid the better. Our liquid screed is dry enough to walk upon in as little as 24 – 48 hours, so it is not going to hold up other contractors who may be painting, installing windows, or anything else.

There are lots of other advantages to using a liquid screed in Surrey. Liquid screeds come in two types – anhydrite based (gypsum) and cement based. An anhydrite screed dries at a rate of 1 mm per day up to 40mm thick and 2 mm per day after that. A typical anhydrite screed would be 50 mm thick, so the drying time would be about 60 days. A cement based screed dries faster – in about a third of that time – so would be dry in about 20 days.

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The Many Benefits of Underfloor Heating

Underfloor heating is fast becoming one of the most popular home improvement projects in the UK because of the many benefits. If you are thinking of installing underfloor heating in Warwickshire, here are some facts.

Underfloor heating can be either electric or water-based. If it is water-based it is reliant upon gas and is typically more cost-effective to run, but water-based systems are more expensive to install. However, underfloor heating is cheaper than radiator systems to run, and will continue to save money over the years. Furthermore, underfloor heating, once installed, needs virtually no maintenance whatsoever, and companies that provide it will often offer a 25 year or more warranty.

Underfloor heating in Warwickshire will heat the whole house evenly, so you won’t walk into one room and find it is colder than another. In addition, every room is heated evenly, whereas with a radiator that relies on convection there will be parts of the room which are cooler than others. However, having said that, each room will have its’ own dedicated thermostat, so you can alter the temperature of a room, or turn it off altogether if it is a room that you are not using such as a spare bedroom.

When using radiators, the floor itself remains cold, and at ground level there can even be some dampness. This makes for ideal breeding conditions for the dreaded dust mite. However, when there is underfloor heating it makes living conditions too warm for them to live and breed in. Studies have shown that underfloor heating reduces dust mites by up to 80% which is far better for people suffering from asthma.

Many people believe that underfloor heating only works with certain solid floor surfaces such as tile or stone, but in fact most systems today can work with any sort of flooring – wood, laminate, vinyl, and even carpet. However, you should note that because underfloor heating relies on the floor retaining heat, a solid floor is better than laying carpet directly over the heating pipe layer.

Another advantage is that you no longer need radiators, which do take up a certain amount of space in the room and are not the most attractive pieces of equipment. 

Liquid Screeds and Sanding In Didcot

More and more contractors and specifiers in the UK are choosing to have liquid screed laid on the substrate of a building rather than the traditional sand and cement screed, because of the many benefits that it has.

A traditional sand and cement screed is laid by hand which means getting down on hands and knees and using hand tools to lay it. A liquid screed is far quicker to lay because it arrives ready mixed and is pumped on to the substrate. Because it is liquid, it is self-levelling and will fill any gaps or uneven areas. An area of 100 square metres can be covered with a liquid screed in as little as 45 minutes.

But the advantages don’t stop there. A liquid screed will not curl, and it is highly resistant to cracking. It is also extremely resistant to shrinkage. Where it is being laid over underfloor heating, another benefit is that it is almost twice as thermally conductive as a traditional sand and cement screed and is therefore environmentally friendly in that less energy is required to produce the same amount of heat in the room above.

It is also possible to force dry a liquid screed after only seven days. Using the right equipment, it can be force dried and ready for a finishing floor to be installed in as little as a month.

However, before the finishing floor is laid, the screed should be sanded. Sanding in Didcot is done so that any laitance remaining on the surface is removed regardless of what the finishing floor is going to be.

Floor sanding in Didcot begins with the screed being swept to remove any nails or other debris which could damage the sanding machine. For the initial sanding stage, a coarse grit paper is used, and then the second cut is carried out using a finer grit than the first cut. After that stage a final stage is carried out with a finishing machine and then the surface should be coated with a sealant. Carrying out this process will ensure that the finishing floor fits perfectly and any glues used in tiling for instance, will adhere correctly.