JG LowFit Castellated Panel 16mm Installation Manual Download Page 2

Description

When installing over suspended timber floors, ensure the structure is secure, fixing any 
loose or damaged timber & check with a suitably qualified person the floor is capable 
of withstanding the additional weight & take any necessary measures to strengthen the 
structure. Fill any gaps to prevent self-levelling compound from leaking through. 

The JG LowFit 

C

astellated 

P

anel is a 16mm deep 

castellated panel (0.6m² effective area per panel). It is 
designed to be used  with 12mm JG polybutylene barrier 
pipe and self-levelling screed (typical overall system 
depth 18-20mm) to provide  a high output, low profile 
UFH solution.
Each panel has a 50mm overlap to give additional strength and support. 
In addition, the panel has a self-adhesive backing to make installation 
easier and has been made with additional holes to enable the screed to 
adhere to the substrate below giving a solid, stable structure.

Please Note

 

– These instructions are provided to give guidance on the 

correct installation of the JG 

Castellated

 

P

anel system. They are not 

intended to be, or provided as, comprehensive system design guides or 

complete UFH installation instructions. In all cases, installers are 

reminded that UFH installations need to comply with relevant Building 

Regulations, British Standards, and manufacturer’s instructions.

Installation

1.

  

Check Floor Levels

Before laying the 

JG Lowfit Ca

stellated 

P

anel, ensure that the floor is level 

and without undulations or high/low spots. Check that the sub floor is flat  & 
level to meet SR2 flatness requirement, which is 5mm over a 2m distance. It 
may be necessary to pour a self-levelling floor mixture before installation to 

ensure a

 

suitable surface.

2.

  

Clean and prime

The JG LowFit 

Castellated Panel

 can be laid on a concrete, plywood, or 

chipboard floor but in all cases the floor should be swept free of debris and 
then primed using

 

a suitable floor primer available from a wide range of 

suppliers. Once the primer has cured (follow the manufacturer’s 
instructions), you can begin to lay the plastic panels. 

(For details of suitable primers please refer to our website www.jgunderfloor.com)

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