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Laying edge insulation strips: Instructions for DIY enthusiasts
Laying edge insulation strips: Instructions for DIY enthusiasts

Video: Laying edge insulation strips: Instructions for DIY enthusiasts

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The small, inconspicuous stripe along the wall has a great effect: edge insulation strips make the difference between quiet living and living in peace. We explain why it is so important that you lay the insulation strip and give you step-by-step instructions on how to install the edge insulation strip in the screed in your home.

Table of contents Table of contents Laying edge insulation strips in the screed: this is why it is important

  • What is an edge insulation strip?
  • What is the function of the edge insulation strip?
  • What is the edge insulation strip made of?
  • What insulation strips are there?
  • Laying edge insulation strips correctly: step by step

Table of contents Table of contents Laying edge insulation strips in the screed: this is why it is important

  • What is an edge insulation strip?
  • What is the function of the edge insulation strip?
  • What is the edge insulation strip made of?
  • What insulation strips are there?
  • Laying edge insulation strips correctly: step by step

What is an edge insulation strip?

Edge insulation strips lie between the wall and the screed and ensure better footfall sound insulation by decoupling the two. They should be installed with both dry screed and self-leveling screed - however, the screed must be laid floating on an insulation layer. Imagine a narrow band made of a heat-insulating material that runs along the floor along every bare wall of the room, including columns, supports and stairs.

What is the function of the edge insulation strip?

1. The insulation strip is there to prevent sound bridges and to contribute to the impact sound insulation. That means: if you walk on the upper floor, you shouldn't hear your footsteps on the lower floor thanks to the edge insulation strip. Because it interrupts the transmission of the sound and decouples the screed: The screed and the floor laid on it have no direct connection to the wall and therefore do not transmit the sound of your steps to the wall and from there through the whole house.

2. If you have underfloor heating, you definitely need an edge insulation strip. Only through it can the screed expand safely, without tearing and without damaging the flooring or even the underfloor heating itself.

3. The third task of the edge insulation strip is to protect against moisture, namely both the screed and the floor covering against moisture from the wall, and the wall against moisture from the room. This works best if a protective layer made of polyethylene film, bitumen paper or raw glass fleece is laid between the solid concrete sub-floor and the screed.

What is the edge insulation strip made of?

Made of heat-insulating material, that is: polyethylene foams. But be careful: the material of construction class B2 is considered to be normally flammable. If you have an increased need for security or if there are special requirements for building a house for legal reasons, you can fall back on mineral wool (class A1). Apart from the fact that it is not flammable, it is also heat and soundproof, dimensionally stable, repels water and is also long-lasting.

What insulation strips are there?

Edge insulation strips are available in thicknesses of five, eight and ten millimeters, ready to buy on a roll. Height: 100, 120 millimeters or 150 millimeters. Remember that the strip must be 10 to 15 millimeters higher than the subsequent screed height. If in doubt, take the higher variant.

For floors without underfloor heating, the thickness of five millimeters is usually sufficient - eight would of course be better for sound insulation. Choose at least eight, better ten millimeters, if you want to install underfloor heating.

Edge insulation strips are self-adhesive, for tacking or for gluing (with double-sided adhesive tape or solvent-free glue). While nothing can go wrong with the two types of strips to be glued and they are also ideal for DIY enthusiasts, when laying the edge insulation strips that can be stapled, make sure that the staple needles are shot into the wall above the floor level. Otherwise, the small tacking needles cause major problems and transmit the impact sound from the floor into the wall. In this case, we advise that experts do the work. Special tacker insulation strips are higher and thinner than those for gluing because once they have been tacked to the wall, they are folded in half before the screed is laid.

There are also edge insulation strips with and without a foil flap (also called a foil apron) to buy.

Randdämmstreifen
Randdämmstreifen

You should go for the product with a foil flap if you are laying a leveling screed. In combination with the film to be applied as moisture protection, the flap prevents the screed from running where it should not. If you lay dry screed, you can choose the insulation strip without a film flap.

Randdämmstreifen ohne Lasche
Randdämmstreifen ohne Lasche

Laying edge insulation strips correctly: step by step

You should take your time and work conscientiously when laying the edge insulation strips. Ideally in pairs, because even the slightest mistake on your part or the smallest material problem can have a major impact on your living comfort in your own four walls later. The key word here is sound insulation. Who wants to hear the permanent whirring of the Carrera train from the children's room at Sunday's “crime scene” shows?

1. Measure how much material you need, cut it and place it in front of the areas to be insulated. Pipes that may protrude from the screed must also be insulated and therefore included in the calculation. Do not forget about obstacles in the room such as stairs, beams, posts, corners and angles.

2. Now attach the insulation strips depending on the type of edge insulation strips. Make sure that the strips run straight along the floor. In order to avoid gaps in corners and angles, we recommend laying the insulation strips over the corners and angles and cutting them slightly in the middle so that the corner or angle can be completely filled.

3. Then lay the floor insulation.

4. Place the protective film (also called separation layer) on the floor insulation. The sheets should overlap by 20 centimeters. Cut out the pipes and glue the sheets together.

5. If available: Now pull the foil apron off the edge insulation strip and glue it with the protective film of the separating layer. This guarantees the tightness of the insulation. The underfloor heating and / or the screed can then be laid.

6.) Lay the screed.

Sabrina Deckert

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