Latest News & Projects
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What Thickness Should Floor Screed Be For Underfloor Heating?
Getting The Right Screed Depth For Optimal Heating Performance
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Determining the correct floor screed thickness for underfloor heating installations is crucial for achieving optimal thermal performance, energy efficiency and long-term reliability. The screed depth directly affects heat distribution, response times and running costs of your underfloor heating solution.
Getting this measurement wrong can result in poor heating performance, increased energy bills and potential structural issues. Whether you're planning a new build or retrofit installation, the correct floor screeding specification forms the foundation of an effective underfloor heating system.
Standard Screed Thickness Requirements
Water-Based Underfloor Heating Solutions
For water-based (wet) underfloor heating arrangements, the recommended screed thickness above the pipes typically ranges from 65mm to 75mm. This depth provides sufficient thermal mass to distribute heat evenly whilst maintaining structural integrity.... -
Concrete Floor Screeding In Mansfield Using BreedonFlow
Location: Mansfield, Nottingham
High-Performance Screed For A Large Site Installation
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We recently completed a concrete floor screeding job at an active building site in Mansfield. The project involved covering a total of 160m², and we poured 13m³ of BreedonFlow fibre-reinforced material across multiple plots. The job was part of a larger construction schedule, meaning precise planning and efficient execution were essential to keep things moving on site.
BreedonFlow is a self-compacting concrete screed that’s ideal for large surface areas. For this job, we used a version reinforced with steel fibres, which adds extra strength and durability across the entire floor area. The result is a hard-wearing surface that is highly durable and reliable.
Fast, Even Coverage With Self-Compacting Material
BreedonFlow is designed to spread and level itself without the need for excessive tamping or vibration. This makes it particularly useful for covering larger spaces quickly and consistently. On this Mansfield site, it al... -
Floor Priming & Screeding In Ilkeston
Location: Ilkeston, Derbyshire
Preparing Office Factory Unit For Screeding
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We recently completed a screeding job in Ilkeston for a new office factory unit. The site had underfloor heating installed by another contractor, and we were brought in to complete the floor screed over the top.
The total area was close to 300m2, so it required careful planning to keep the job smooth and safe. We worked in two stages. First, we primed the entire area with a grit primer. Then, the following day, we installed the levelling compound.
Using The Right Materials
This job called for the use of a high-quality levelling compound. We applied 8mm of compound across the full 300m2. It was a large space, and we needed 150 bags of compound to complete the work.
The grit primer helped the compound bond properly to the subfloor. This makes sure the finish stays solid and durable for years. It also helps deal with any minor movement or expansion from the underfloor heating below.
Day One – Grit Primer Application
The first day on sit... -
Home Extension Insulation & Screeding - Insulation and Screeding
Location: West Midlands
Insulation & Screeding For A Garden Room / Office
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At Mitchell Plastering & Dry Lining Ltd, we specialise in professional floor screeding and insulation solutions for residential and commercial projects. A recent job in the West Midlands involved insulating and screeding a garden room/bar and office, producing a durable and energy-efficient flooring system.
Installing A Reliable Insulation System
To create a solid base for the screed, we started by installing 20mm polystyrene insulation and 75mm Celotex insulation over the client’s 1200-gauge polythene damp-proof membrane (DPM). This combination provides excellent thermal efficiency, helping to keep the space well-insulated throughout the year.
For additional protection and movement accommodation, we fitted a 25mm perimeter upstand along the edges of the flooring. A 6mm expansion strip was also added to allow for natural material expansion and contraction, preventing cracks and achieving long-term performance.
Floor Screeding Wit... -
Floor Repair & Levelling In Ilkeston - Levelling Compound & Liquid Flow Screed
Location: Ilkeston, Derbyshire
Preparing A Floor For A Full House Renovation In Hallam, Ilkeston
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At Mitchell Plastering & Dry Lining Ltd, we recently completed a full floor repair and levelling project in Hallam, Ilkeston, as part of a complete house renovation led by a local builder. Our role was to prepare the floors for final finishes, achieving a smooth, level, and durable surface suitable for any chosen flooring material.
This project required working with a variety of existing substrates including concrete, ceramic tiles and sand-cement screed. To achieve the best results, we used specialist floor levelling products to create a seamless and long-lasting surface.
Floor Preparation & Crack Repairs
Before any levelling work could begin, our team sanded and vacuumed the existing floor to remove any dust, dirt or surface irregularities. Once the floor was fully prepped, we carried out the following works:
Filled all cracks and holes using professional crack repair materials to prevent future movement.
Appli... -
Commercial Offices - Fast Drying Screed
Location: Brassington, Matlock
Contract Duration: 1 Day
Working for a local client to convert this building into a commercial office.
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We installed a taped & lapped 1200 gauge membrane, 5mm perimeter isolation strip with fast drying screed supplied by Rightmix to cover 205m2. -
Enrok Construction - New Medical Centre
Location: Nuneaton
Contract Duration: 2 weeks
Our final update on Hartshill Medical Centre in Nuneaton for Enrok construction, we have now completed the installation of insulation, underfloor heating and liquid flow screed to both the ground floor and 1st floor.
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The ground floor consisted of 36m3 of Tarmac’s liquid flow screed (screed A) laid on 500gg polythene separating membrane on 120mm Celotex & 25mm EPS70 polystyrene along with a 25mm Celotex upstand to all exterior walls and a 5mm foam expansion strip to all walls.
On the first floor 32m3 of Tarmac’s liquid flow screed (screed A) laid on 500gg polythene separating membrane on 50mm Celotex & 15mm EPS70 polystyrene with a 5mm foam expansion strip to all walls.
Part of package included the installation of the underfloor heating which consisted of 6 manifolds (2 on the 1st floor and 4 on the ground floor). 16mm pipes, tracker clips, 42 thermostats and 52 thermal actuators.
The new medical centre will be a huge asset to the local community once it’s completed, we are pl... -
Private Development - Underfloor Heating & Liquid Flow Screed
Location: Risley - Derbyshire
Contract Duration: 2 days
Another local project in which the team at Stuart Mitchell's supplied a complete flooring solution with all preparation work, underfloor heating and liquid flow screed.
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The first day we prepared the house with 100mm insulation and membrane before installing the 8 port manifold and pipework.
The next day we returned to site and completed the work by laying 5.2m3 of Breedon Gypscreed. -
3 New Build Bungalows - Underfloor Heating & Liquid Flow Screed
Location: Ripley
Contract Duration: 1 week
A new client requested us to install underfloor heating and screed for three new bungalows.
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The under floor heating systems that are fixed to manifold comprise of 7 Port (Type A) of 6 Port (Type B) Manifold with inserts and pipe bends, 2 x Thermomix – pump and mixing set to suit boiler, 2 x Master Wiring Centre, 13 x Thermal Actuators for individual control, 13 x Digital Room Thermostats, 2 x Probes and 16mm Pipe, Staples & Conduit.
A 50mm liquid flow screed was supplied and the insulation comprised of 150mm celotex, 25mm EPS70 polystyrene with damp proof membranes, upstands and expansion strips to all walls -
House Refurbishment - Levelling Compound
Location: Loughborough
Contract Duration: 3 hours
Another small floor refurbishment for an existing client in Loughborough. The client required the kitchen & hall floor to be level to receive new floor coverings at a future date.
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To achieve this we had to sand and vacuum the floor, prime it and finally applied 18 bags of Mapei renovation to create an even surface for the floor coverings. -
New Build - Derbyshire - Plastering, Drylining and Rendering
Location: Derbyshire
Contract Duration: 8 weeks
A private development which saw us complete the drylining, plastering and rendering for one of our repeat customers.
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A challenging project for us particularly with the sloping soffits.
Weber Ivory render applied to the exterior. -
New Build - Fast Drying Liquid Flow Screed
Location: Worthington, Leicestershire
Contract Duration: 1 day
We recently completed two plots for an existing customer in Leicestershire. The insulation & floor preparation was carried out by the client.
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We supplied 10.2m3 of Breedon flow Rapide (fast drying screed) from Breedon's plant in Dunkirk, Nottingham. -
G Developments - Liquid Flow Screed
Location: Solihull, West Midlands
Contract Duration: 1 Day
A recent project completed for Dawn & Stuart at G Developments. The insulation, underfloor heating and perimeter isolation strip all completed by the client.
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We supplied 8.8m3 of liquid flow screed from our suppliers Hills Concrete.
Total area was 176m2 at a depth of 50mm. -
Garage Floor Repairs
Location: Solihull, West Midlands
Contract Duration: 1 day
After an enquiry from a housebuilder we were requested to perform remedial work on an uneven double garage, this involved sanding the existing slab and covering with Mapei renovation screed.
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Marks and Spencer Refurbishment - Levelling Screed
Location: Giltbrook, Nottingham
Contract Duration: 2 days
We were awarded this screeding contract in January 2020 for a refurbishment of a retail unit for Marks and Spencer.
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The total floor area of the ground and first floor combined was approximately 5200m2 and we were asked to install a nominal 5-6mm.
After on site meetings and discussions with the main contractors we had agreed that the screed was to be installed in two visits which would keep the programme of works running smoothly.
The products used were Tomsit XXL and XXL Power. -
Levelling Screed Over Underfloor Heating - WeberFloor
Location: Grantham
Contract Duration: 2 Hours
This project was awarded to us working alongside Weberfloor. We have built a strong relationship with Weber and have become one of their preferred installers of their flooring range.
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After onsite visits and discussions with a Weber representative and the main contractor Weberfloor 4310 was selected to be installed at depths of 5-32mm over 190m2.
This required approximately 270 bags which were pumped into place using our new MTec 330 pump in under 2 hours.
