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Moisture barrier membrane for swimming pools and saunas – Ampatex Sisalex 518

Ampatex Sisalex 518 moisture barrier membrane is:-

  • extremely moisture and chlorine resistant, making it ideal for swimming pools and saunas.
  • a highly tear resistant fleece backed membrane, with an Sd value of more than 1500m.
  • perfect for ensuring the correct moisture flow through building structures using vapour open and vapour closed insulation materials.
  • an easy to use membrane for providing a continuous internal air tightness layer.

Prices:  from £300.87 + VAT per 1.5 x 50m roll.

Moisture barrier membrane for swimming pools and saunas – Ampatex Sisalex 518

Ampatex Sisalex 518 moisture barrier membrane is:-

  • extremely moisture and chlorine resistant, making it ideal for swimming pools and saunas.
  • a highly tear resistant fleece backed membrane, with an Sd value of more than 1500m.
  • perfect for ensuring the correct moisture flow through building structures using vapour open and vapour closed insulation materials.
  • an easy to use membrane for providing a continuous internal air tightness layer.

Prices:  from £300.87 + VAT per 1.5 x 50m roll.

“A really tough membrane that is ideal for protecting building structures around swimming pools and saunas from excessive moisture” – Chris Brookman

Product overview.

Where is it used?

  • On the inside of timber/metal frames/dry lining, on the inside of roof structures or on the top side of floors.
  • Can be used as a moisture barrier (DPM) in basement walls and floors.

How do I use it?

  • Sisalex 518 moisture barrier membrane should always be used on the warm side of the wall/roof and with the writing facing inwards.
  • It can be bonded, using Ampacoll DT double sided tape, to the underside of rafters or the inside of timber studs prior to being boarded over or counter battened.
  • If using on the inside surface of wood fibre insulation boards, apply Ampacoll Primax primer and Ampacoll DT double sided tape to the surface at regular intervals to allow the membrane to be bonded to the surface.
  • When used in saunas or swimming pools, joints should be sealed with Ampacoll BK530 double sided tape first and then Ampacoll XT airtightness tape.
  • All joints should overlap by at least 100mm and the perimeter should be sealed prior to counter battening or being over boarded with plaster board.
  • Once the joints are taped it forms an air tight, moisture regulating layer.
  • Any penetrations, such as joists, pipes, cables or ducts should be sealed with Ampacoll BK 535 penetration sealing tape.
Technical Details

How much will you need?

  • Each roll of Sisalex 518 moisture barrier membrane is 50m long and 1.5m wide. It covers an area of 70m2 accounting for overlaps.

Do I need to tape the joints?

  • Yes, you should always tape the laps, usually with the Ampacoll INT or the XT tape. This ensures the air tightness of the membrane and that it functions correctly to reduce moisture flow through the walls from the interior. If using in swimming pools or saunas you should also seal the laps with Ampacoll BK530 double sided tape.

What are it’s properties?

  • The Sd value of the membrane is more than 1500m which is very high and so is classified as a moisture barrier membrane rather than a vapour control membrane. However, it makes it ideal when building swimming pools and saunas as it prevents the very high moisture levels of moisture inside the building damaging the fabric.
  • Sisalex 518 is also waterproof so can be used as a DPM for damp proofing basement floors and walls.
  • It has good tear resistance, 180N/5cm
Product Downloads

Product Data Sheet – Ampack Sisalex 518 moisture barrier membrane

Product overview.

Where is it used?

  • On the inside of timber/metal frames/dry lining, on the inside of roof structures or on the top side of floors.
  • Can be used as a moisture barrier (DPM) in basement walls and floors.

How do I use it?

  • Sisalex 518 moisture barrier membrane should always be used on the warm side of the wall/roof and with the writing facing inwards.
  • It can be bonded, using Ampacoll DT double sided tape, to the underside of rafters or the inside of timber studs prior to being boarded over or counter battened.
  • If using on the inside surface of wood fibre insulation boards, apply Ampacoll Primax primer and Ampacoll DT double sided tape to the surface at regular intervals to allow the membrane to be bonded to the surface.
  • When used in saunas or swimming pools, joints should be sealed with Ampacoll BK530 double sided tape first and then Ampacoll XT airtightness tape.
  • All joints should overlap by at least 100mm and the perimeter should be sealed prior to counter battening or being over boarded with plaster board.
  • Once the joints are taped it forms an air tight, moisture regulating layer.
  • Any penetrations, such as joists, pipes, cables or ducts should be sealed with Ampacoll BK 535 penetration sealing tape.

How much will you need?

  • Each roll of Sisalex 518 moisture barrier membrane is 50m long and 1.5m wide. It covers an area of 70m2 accounting for overlaps.

Do I need to tape the joints?

  • Yes, you should always tape the laps, usually with the Ampacoll INT or the XT tape. This ensures the air tightness of the membrane and that it functions correctly to reduce moisture flow through the walls from the interior. If using in swimming pools or saunas you should also seal the laps with Ampacoll BK530 double sided tape.

What are it’s properties?

  • The Sd value of the membrane is more than 1500m which is very high and so is classified as a moisture barrier membrane rather than a vapour control membrane. However, it makes it ideal when building swimming pools and saunas as it prevents the very high moisture levels of moisture inside the building damaging the fabric.
  • Sisalex 518 is also waterproof so can be used as a DPM for damp proofing basement floors and walls.
  • It has good tear resistance, 180N/5cm

Material in action.

This image shows the Ampack Sisalex 518 membrane installed inside a section of a building. Click on the image to zoom in. If you have any questions on the detailing, please contact us.

 

Prices & Shipping

Here you will find pricing and shipping estimates. To get a fixed quote, please call our technical team on 01392 861763 or get in touch via the form below.

 

Ampack Sisalex 518 moisture barrier membrane is priced as below with a 10% discount on orders of 3 rolls or more.

Roll length [m]Roll width [m]Roll Area [m²]Membrane weight [g/m²]Roll weight [kg]Sd value [m]Single roll cost [£]3+ rolls [each]
501.57517513.11500£300.87£270.78

Carriage is typically calculated at £25 + VAT per roll. This price does vary if delivery is required to remote locations so please contact us for a more accurate price.

 

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Request an estimate.

In summary, if you are looking for more than just a builders’ merchant, we might be the guys to talk to.

  • This field is for validation purposes and should be left unchanged.

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