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Step-by-Step Guide: Preparing Flooring for Liquid Screed
02nd December 2020 The concrete experts at Wright Minimix share their helpful step-by-step guide to preparing your flooring for liquid screed.
Step 1
Remove any debris from the sub floor.
Step 2
Place insulation in two layers. Use dried sand to fill the void around pipes and ensure that this is level before installing the second layer of insulation board.
Step 3
Lay a membrane of 1000 gauge or thicker immediately under the pipework (above the insulation board) as a slip layer, and to prevent leakage of the screed before setting.
Step 4
Install an edging strip around the edges and corners of the wall and attach securely.
Step 5
After laying (but before setting) make sure that you fully seal any shuttering across doorways and steps with expanding foam or mastic. This will prevent leakage.
Step 6
Seal any pipe ducts or holes through walls before placement of the liquid screed.
Installing liquid screed with underfloor heating
When installing liquid screed with underfloor heating, you should follow these steps:
Step 1
Install underfloor heating pipes and ensure that they are clipped every 400mm and more around bends.
Step 2
Make sure that the system is full of water prior to the liquid screed being laid.
Step 3
If using an ‘eggbox’ type pipe system, membrane should be laid under the eggbox. Avoid using small offcuts of eggbox to avoid possibility of floating.
Note: Minimum cover above underfloor heating pipes is 30mm, therefore minimum screed thickness is normally 50mm when using a 16mm UFH pipe.
Wright Minimix’s liquid screed has been specially designed and tested to provide the perfect finish for a range of flooring applications in both residential and commercial settings. To learn more, get in touch with our knowledgeable team today on 0117 958 2090 and we’ll be happy to answer your questions.