Preparing to pour screed is a crucial stage in any flooring project. Whether you are working on a new build, a renovation, or a commercial fit-out, getting the preparation right will help ensure a strong, durable and level finish. Poor preparation can lead to cracks, uneven surfaces, and delays in later stages of the project.
This complete checklist outlines everything you need to do before the screed is poured. Following these steps will help your project run smoothly from start to finish.
Preparing for Your Screed Pour: The Complete Checklist
1. Confirm Substrate Preparation
A clean and stable substrate is essential for good screed adhesion.
Remove all dust, debris, oil, grease and loose material.
Check that the substrate is structurally sound with no movement or deflection.
Ensure levels and falls are correct, particularly in areas where drainage is required.
2. Install Damp Proof Membrane (DPM)
A DPM prevents moisture from rising into the screed, which can otherwise cause damage to flooring.
Lay the DPM carefully with full coverage of the floor area.
Seal all joints, overlaps and edges.
Extend the DPM up the walls where needed to form a complete barrier.
3. Fit Insulation (if required)
Where thermal or acoustic insulation is specified:
Choose the correct insulation type and thickness for your project.
Lay the insulation flat and without gaps.
If required, add a separating layer or slip membrane on top of the insulation.
4. Install Edge Strips
Edge strips allow the screed to expand and contract without cracking.
Install edge strips around the full perimeter of the room.
Add movement joints where needed in large areas or where structural joints exist.
5. Plan Services and Conduits
All underfloor services must be in place and tested before pouring screed.
Install underfloor heating pipes or electric heating mats as specified.
Secure all pipes and conduits so they do not shift during the pour.
Pressure test underfloor heating systems before screeding begins.
6. Set Levels and Mark Datum Lines
To ensure an accurate and level finish:
Establish a clear datum level around the space.
Mark levels on walls and use screed rails or guides where appropriate.
7. Confirm Screed Type and Curing Requirements
Choose the correct screed for your project and understand its requirements.
Decide between traditional sand/cement screed or liquid flow screed.
Be aware of curing times and when floor coverings can be installed.
8. Prepare Site Access and Conditions
Good site preparation helps ensure the screed can be poured without delays.
Confirm that delivery vehicles can access the site.
Maintain suitable indoor temperatures during and after the pour.
Minimise draughts, direct sunlight and excessive humidity during curing.
9. Final Pre-Pour Inspection
Before screed delivery, carry out a final check of the site.
Verify that membranes and edge strips are correctly installed.
Confirm that all services are in place, secure and tested.
Double-check all levels and guides are ready for use.
Summary
A successful screed installation starts long before the screed is mixed or poured. Careful preparation helps avoid common pitfalls and leads to a strong, level and durable floor.
By following this complete checklist, you will give your screeding project the best possible chance of success. If you need expert advice or support with your preparation, do not hesitate to get in touch with our team.
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