SPECIFICATION GENERATOR
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From £1129.09 + VAT per Roll
Ampatop A Black breather membrane
Ampatop A Black is:-
- a non-combustible breather membrane for roofs and facades.
- highly temperature resistant and ideal for use under PV panels or in facades.
- fall resistant, making working on roofs much safer than standard membranes.
- UV stable and can be left uncovered for up to 9 months.
- able to significantly improve the fire resistance of timber framed structures.
Product overview
Where is it used?
- Ampatop A Black non-combustible breather membrane is used on the exterior of timber framed walls where open or closed cladding is installed.
- It can be used under roof mounted PV panels to ensure breathability is maintained where plastic breather membranes would degrade due to high heat levels.
- When used in facades it can prevent uncontrolled spread of fire over the surface of the wall.
How is it used?
- Ampatop A Black non-combustible breather membrane can be laid horizontally or vertically with the black face towards the exterior.
- It can be fixed over the exterior of timber frame structures with stainless steel staples, which must be kept under the laps to prevent moisture penetration.
- Laps should be firmly sealed with Ampacoll Profix sealant or Ampacoll A Tape Black to ensure weather-tightness
- When battens are fixed through the breather membrane, use Ampacoll ND Duo or ND Band to ensure a weathertight seal is formed around nails/screws.
- When using open cladding, ensure that the gaps between the boards is no more than 50mm and it is no more than 50% open (e.g. minimum 50mm wide boards with 50mm gaps).
How much will you need?
- Ampatop A Black non-combustible breather membrane comes in rolls which are 50m long and 1.4m wide, totaling 70m2 on a roll. However, after the 100mm laps required between rows, each roll covers a maximum of 65m2.
Frequently asked questions
Can I use it on a roof?
Can I use it on a roof?
- The Ampatop A Black membrane can be used on roofs and facades as a UV resistant breather membrane.
Do I need to tape the joints?
Do I need to tape the joints?
- Yes, all joints should either be taped with the Ampacoll A Tape Black or the Ampacoll Profix sealant, to ensure continuity of the non-combustible surface.
How long can I leave it exposed?
- The membrane can be exposed to all the elements for up to 9 months without any degradation in performance.
Is it breathable enough for old buildings?
Is it breathable enough for old buildings?
Is it breathable enough for old buildings?
- Yes, the Ampatop A Black membrane has an Sd-value of 0.06m and is more than permeable enough for old and new buildings alike.
What are its properties?
- Sd value – 0.06m
- Resistance to water penetration – W1
- Weight – 220g/m2
- Fire Behaviour – A2-s1, d0
- Tensile Strength – 2900N/5cm longditudinal, 2150N/5cm transverse.
- Natural Weathering – 9 months
- Open joint proportion – 50mm/50%
- UV stability – >10 years
- Temperature resistance – -35C to 120C
- Minimum roof slope – 10 degrees
Product videos
Ampatop A Black fire test comparison
In this video you can see the differences between the Ampatop A Black membrane and a standard fire class E facade membrane.
Technical details
Product downloads
Pricing & shipping
| 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] |
|---|---|---|---|---|---|---|---|
| 50 | 1.4 | 70 | 243 | 17 | 0.08 | £1254.55 | £1129.09 |
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We’d like to hear from you. Call us on 01392 861763 or email us at justask@backtoearth.co.uk with any questions or comments.
If you can’t seem to find what you need on our website or you have large quantities of materials to purchase please contact us for a chat and we’ll offer you a more bespoke solution.
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