Main menu: (access keys 1 to 8)

1. 
2. Company
3. Systems
4. Products
5. News and Events
6. Knowledge Centre
7. Contact

1. How our system works
2. Installation Videos
3. System Design
4. Manifolds
5. Heat Pumps
6. Screeding
7. Expansion Joints
8. Carpet Underlay
9. Timber Floors
10. Vinyl Floors
11. Insulation
12. FAQ's
13. Downloads

 

Expansion Joints-Crack inducers

All screeds expand and contract to some degree so allowance has to be made for this. The perimeter insulation fitted with underfloor heating allows for some of this, however large areas will need to have expansion joints or crack inducer cuts in the screed itself to allow movement and avoid screed cracking. Expansion joints will also be required to mirror any expansion joints in the floor slab. These should be as recommended by the screeder or architect. (refer to our section on expansion joints)

Day Joints

Day joints are positions where the screed has been finished on one day and will be carried on the next day. In these positions, to avoid cracking the joint needs to be reinforced with mesh to bond the screed together. Alternatively an expansion joint should be fitted in this position.

Floor tiles, marble floors, stone floors

Where the screed is to be finished with a rigid tile, marble or stone topping the expansion provisions are very important as screed movement can crack the floor finish. The flooring should be designed by the floor installer detailing expansion provision in the floor tiles themselves. This can then be mirrored with a separate bedding layer with expansion joints or in the screed below. Alternatively, a de-bonded bedding layer for the floor finishes can be installed above the screed.

Expansion joints will also be required to mirror any expansion joints in the floor slab. These should be as recommended by the screeder or architect.

Day joints

Day joints are positions where the screed has been finished on one day and will be carried on the next day. In these positions, to avoid cracking the joint needs to be reinforced with mesh to bond the screed together, alternatively an expansion joint should be fitted in this position.