Quality
Guarantee
Uncompromising quality in every installation, backed by our full assurance.
Professional Advice
Expert guidance tailored to your project from qualified heating specialists.
Years of Experience
Countless years delivering flawless underfloor heating and screeding solutions.
Thermal
Efficiency
Maximise comfort and minimise energy bills with advanced efficient systems.
Quality
Guarantee
Uncompromising quality in every installation, backed by our full assurance.
Professional Advice
Expert guidance tailored to your project from qualified heating specialists.
Years of Experience
Countless years delivering flawless underfloor heating and screeding solutions.
Thermal
Efficiency
Maximise comfort and minimise energy bills with advanced efficient systems.
Start Your Project Today
From initial survey to final installation, we handle everything with zero hassle - arrange your free visit now.
Contact us
Get in Touch
Contact Us
We will get back to you as soon as possible.
Please try again later.
prepare & Care
Expert Pre-Installation Guide, Subfloor Preparation & Screed Aftercare
The lifespan and performance of your final floor finish are entirely dependent on the quality of the subfloor preparation. Southern Liquid Screed
provides expert services and guidance to ensure your floor construction starts right.
Following this Pre-Installation Preparation Guide is critical for achieving a flawless finish, maximising the efficiency of your Underfloor Heating (UFH) system, and ensuring the success of the liquid screed pour.
Southern Liquid Screed
South Coast Covering: West Sussex, Hampshire, Surrey, Dorset, Reading, Wokingham & Bracknell
Start Your Project Today
From initial survey to final installation, we handle everything with zero hassle - arrange your free visit now.
Conact us
Get in Touch
Contact Us
We will get back to you as soon as possible.
Please try again later.
Complete flooring solutions
Expert Pre-Installation Guide, Subfloor Preparation & Screed Aftercare
The lifespan and performance of your final floor finish are entirely dependent on the quality of the subfloor preparation.
Southern Liquid Screed provides expert services and guidance to ensure your floor construction starts right.
Following this Pre-Installation Preparation Guide is critical for achieving a flawless finish, maximising the efficiency of your Underfloor Heating (UFH) system, and ensuring the success of the liquid screed pour.
Get Your Free Site Survey & Quote Today
Let us handle everything with our proven underfloor heating and liquid screed system.
Installed Faster. Guaranteed Crack-free. Backed BY Our Expert Team.
Step by step
Pre-Installation Preparation Guide
To ensure that the liquid screed performs at its best, we highly recommend the following steps be carried out prior to installing underfloor heating and the pouring of the liquid screed:
- Site Readiness and Subfloor Clearance:
• Weather Tight: All pouring areas must be weather tight and sealed where required to protect materials and the installation process.
• Clear & Flat: Make sure the subfloor is completely clear of debris and laid flat. Allow appropriate depth for the insulation, the liquid screed layer, and the final floor coverings.
•
Final Debris Check:
Before the screed truck arrives, ensure the area is again clear and completely free from debris.
2. Insulation & Edging Strips
• Insulation: Lay insulation boards in a staggered form, ensuring all boards are tightly secured with no movement.
•
Edging Strips:
Incorporate edging strips around the perimeter of the room where required. These strips account for the thermal expansion of the screed.
3. Tanking Membrane:
• Laying the Membrane: Lay a tanking membrane (500 gauge if possible) on top of the overlapped insulation. If no insulation is present, lay the membrane directly on top of the concrete slab.
• Sealing: 100mm overlaps are recommended. Tape all joints and corners extensively to ensure they are water tight and no leakages can occur. (You can never use too much tape!)
• Precision:
The neater and closer you get the membrane to walls and round corners, the closer our screed will finish to the walls. Try to avoid leaving air pockets behind or under the membrane.
4. Underfloor Heating Pipe Installation
• Securing: Securely fix underfloor heating pipes every 300mm to prevent movement during the pour.
• Pressure Check: The pipes must be pressure checked to ensure no leakage occurs before the liquid screed is poured.
•
Pressure Check:
The pipes must be pressure checked to ensure no leakage occurs before the liquid screed is poured.
5. Post-Installation Screed Aftercare
• Curing: The liquid screed will dry quickly, but the curing process takes time. Protect the surface from heavy loads and extreme temperature changes immediately following the pour.
• Ventilation: Good ventilation is vital once the initial setting time is passed to allow moisture to escape.
• Commissioning:
We provide essential guidance on commissioning the UFH system (the 'ramp-up' schedule) to prevent thermal shock and ensure the structural integrity of the screed is maintained.
Get Your Free Site Survey & Quote Today
Let us handle everything with our proven underfloor heating and liquid screed system.
Installed Faster. Guaranteed Crack-free. Backed BY Our Expert Team.
Why choose Southern Liquid Screed?
Why Trust Us for Preparation & Care?
At Southern Liquid Screed our reputation is built on technical knowledge. Our commitment to proper preparation is what ensures the success of your Underfloor Heating and the flawless finish of our Liquid Screed. We don't just pour the screed; we partner with you to ensure all crucial pre-installation requirements are met, minimising risks and guaranteeing the long-term durability and performance of your entire flooring system.
Frequently Asked questions
Everything You Need To Know
Here are the answers to the questions
we get asked most often - if
yours isn't listed, we're happy to help.
Is underfloor heating expensive to run?
No - it’s highly efficient, running at lower temperatures than radiators and distributing heat evenly, typically saving 15–30% on energy bills, especially when paired with a heat pump.
How long does liquid screed take to dry?
With Gypsol anhydrite screed you can walk on it after 48 hours and install most floor coverings in just 7–14 days (depending on depth and conditions) – far quicker than traditional screed.
Is underfloor heating safe for kids?
Yes – the floor surface stays at a gentle 25–29 °C, no hot radiators or sharp edges, and it’s completely sealed with no dust circulation.
Will liquid screed crack or shrink?
Premium anhydrite screed like Gypsol has minimal shrinkage and virtually zero risk of cracking or curling when installed correctly, which is why we guarantee it.
Do you handle full installations?
Absolutely – our turnkey service covers everything: site survey, insulation, underfloor heating, liquid screed and project coordination, all with one dedicated point of contact.
Still have questions?
Get in touch today - our experts are ready to give you free, no obligation advice tailored to your project. Click below to arrange your free site survey.
Step by step
Pre-Installation Preparation Guide
To ensure that the liquid screed performs at its best, we highly recommend the following steps be carried out prior to installing underfloor heating and the pouring of the liquid screed:
- Site Readiness and Subfloor Clearance:
• Weather Tight: All pouring areas must be weather tight and sealed where required to protect materials and the installation process.
• Clear & Flat: Make sure the subfloor is completely clear of debris and laid flat. Allow appropriate depth for the insulation, the liquid screed layer, and the final floor coverings.
•
Final Debris Check:
Before the screed truck arrives, ensure the area is again clear and completely free from debris.
2. Insulation & Edging Strips
• Insulation: Lay insulation boards in a staggered form, ensuring all boards are tightly secured with no movement.
•
Edging Strips:
Incorporate edging strips around the perimeter of the room where required. These strips account for the thermal expansion of the screed.
3. Tanking Membrane:
• Laying the Membrane: Lay a tanking membrane (500 gauge if possible) on top of the overlapped insulation. If no insulation is present, lay the membrane directly on top of the concrete slab.
• Sealing: 100mm overlaps are recommended. Tape all joints and corners extensively to ensure they are water tight and no leakages can occur. (You can never use too much tape!)
• Precision:
The neater and closer you get the membrane to walls and round corners, the closer our screed will finish to the walls. Try to avoid leaving air pockets behind or under the membrane.
4. Underfloor Heating Pipe Installation
• Securing: Securely fix underfloor heating pipes every 300mm to prevent movement during the pour.
• Pressure Check: The pipes must be pressure checked to ensure no leakage occurs before the liquid screed is poured.
•
Pressure Check:
The pipes must be pressure checked to ensure no leakage occurs before the liquid screed is poured.
5. Post-Installation Screed Aftercare
• Curing: The liquid screed will dry quickly, but the curing process takes time. Protect the surface from heavy loads and extreme temperature changes immediately following the pour.
• Ventilation: Good ventilation is vital once the initial setting time is passed to allow moisture to escape.
• Commissioning:
We provide essential guidance on commissioning the UFH system (the 'ramp-up' schedule) to prevent thermal shock and ensure the structural integrity of the screed is maintained.
Get Your Free Site Survey & Quote Today
Stop worrying about coordinating multiple trades, cracking screeds or high energy bills.
Let us handle everything with our proven underfloor heating and liquid screed system — installed faster,
guaranteed crack-free and backed by our expert team.
Why choose Southern Liquid Screed?
Why Trust Us for Preparation & Care?
At Southern Liquid Screed, our reputation is built on technical knowledge. Our commitment to proper preparation is what ensures the success of your Underfloor Heating and the flawless finish of our Liquid Screed. We don't just pour the screed; we partner with you to ensure all crucial pre-installation requirements are met, minimising risks and guaranteeing the long-term durability and performance of your entire flooring system.
Frequently Asked questions
Everything You Need To Know
Here are the answers to the questions we get asked most often - if
yours isn't listed, we're happy to help.
Still have questions?
Get in touch today - our experts are ready to give you free, no obligation advice tailored to your project. Click below
to arrange your free site survey.
Is underfloor heating expensive to run?
No - it’s highly efficient, running at lower temperatures than radiators and distributing heat evenly, typically saving 15–30% on energy bills, especially when paired with a heat pump.
How long does liquid screed take to dry?
With Gypsol anhydrite screed you can walk on it after 48 hours and install most floor coverings in just 7–14 days (depending on depth and conditions) – far quicker than traditional screed.
Is underfloor heating safe for kids?
Yes – the floor surface stays at a gentle 25–29 °C, no hot radiators or sharp edges, and it’s completely sealed with no dust circulation.
Will liquid screed crack or shrink?
Premium anhydrite screed like Gypsol has minimal shrinkage and virtually zero risk of cracking or curling when installed correctly, which is why we guarantee it.
Do you handle full installations?
Absolutely – our turnkey service covers everything: site survey, insulation, underfloor heating, liquid screed and project coordination, all with one dedicated point of contact.