Best current price£96.35from OnBuy.com
Shopping.co.uk recommended and popular offers
OnBuy.com£96.35Visit shop 75 Mâ² Underlay Formwork Membrane Roofing Membrane Roofing Underlay 130 G/Mâ² 1.5 M Wide 703774116242
Visit shop1 offer from £96.35
View price history by clicking the chart icon.
This Aquagart Roofing Underlayment Membrane is designed for contractors and DIYers seeking robust moisture management in roofing systems. Its primary benefit is providing a waterproof yet breathable barrier to protect roof structures from condensation and external water ingress. A key consideration is its 3-month UV stability, requiring timely installation of final roofing materials. The membrane features a three-layer construction for durability and diffusion-open performance.
| Model Part Number | 1030111615 |
|---|---|
| Brand | Aquagart |
Its primary function is to act as a secondary barrier against water and to manage moisture by allowing water vapor to escape the roof structure, preventing condensation buildup.
The membrane has a UV stability of 3 months. The final roofing material should be installed within this period.
This underlayment is typically designed for pitched roof applications. Consult specific project requirements for flat roof suitability.
Each roll measures 50 meters in length and 1.5 meters in width.
Diffusion-open means the material allows water vapor (gas) to pass through it, while remaining resistant to liquid water penetration.
It is measured by Class W1, indicating a high level of resistance to water penetration.
The SD value is 0.02 m, which represents the equivalent air layer thickness that has the same resistance to water vapor diffusion. A low SD value, like this one, signifies high water vapor permeability.
Ensure the underlayment is installed with proper overlaps and that all fasteners penetrate through the underlayment and into the sheathing or rafters without creating large holes. Check for any tears or punctures in the membrane and repair them with appropriate tape.
Verify that the underlayment is breathable and correctly installed. Ensure there is adequate ventilation in the attic or roof space, as the underlayment facilitates vapor escape but does not replace ventilation requirements.
This could be due to prolonged exposure to UV light beyond the 3-month stability limit. Ensure the final roofing was installed promptly. Inspect for physical damage that may have occurred during installation.
Setup: The membrane can be applied directly onto roof rafters or roof sheathing. It can also be laid directly over thermal insulation. Ensure the membrane is laid flat and without wrinkles. Overlap subsequent layers according to local building codes and manufacturer recommendations, typically by 10-15 cm. Secure the membrane using appropriate fasteners or batten strips to prevent movement.
Compatibility: This underlayment is compatible with most common roofing materials, including asphalt shingles, metal roofing, tile, and slate. It is designed for pitched roof applications.
Care: Protect the installed membrane from direct sunlight as much as possible due to its 3-month UV stability. Install the final roofing material within this timeframe. Keep the work area clean during installation to prevent debris from damaging the membrane. Avoid walking directly on the membrane unnecessarily; use walking boards if needed.
