Danosa Esterdan 30/P Elast | 1m x 12m Felt Underlay

The Danosa Esterdan 30/P Elast. is a durable SBS elastomeric underlay, weighing 3 kg/m². This torch-applied roofing felt underlay is designed for use with Danosa Polydan 180-60/GP Elast., Danosa Esterdan Plus 50/GP Elast., and Recticel Powerdeck U Insulation Boards.

Overview: 

This bituminous SBS-modified membrane is reinforced with non-woven polyester felt and finished with a quick-melt thermofusible film, ensuring a strong and efficient application.

Applications:

• Buried Structures - Ideal for waterproofing buried structures, providing robust protection against moisture.
• Tanking Membrane - Suitable for use as a tanking membrane, ensuring total waterproofing.
• Two-Layer Systems - Effective as a bottom or top sheet in two-layer waterproofing systems for roofs with heavy bonded, unbonded, or floating protection.

Support Compatibility:

• Heavy Bonded Protection - Suitable for roofs with heavy bonded protection.
• Buried Structures - Ideal for use in bonded buried structures, providing reliable waterproofing.

This product is an excellent choice for robust and long-lasting waterproofing solutions in various applications, ensuring high performance and durability.

Important details about this product:

• Length: 12m
• Width: 1m
• Thickness: 2.5mm
• Weight: 3 kg/m²
• Surface area: 12m²

Advantages & Benefits

• High Piercing Resistance – Offers excellent resistance to both static and dynamic piercing, ensuring robust protection.
• Self-Healing and Rot-Proof – Features self-healing properties and resistance to rot, ensuring long-lasting performance.
• High Tensile Strength – Delivers strong tensile strength and significant elongation at break, providing durability and flexibility.
• Tear Resistance – High resistance to tearing enhances the longevity and durability of the membrane.
• Total Impermeability – Completely impervious to water and water vapour, ensuring reliable waterproofing.
• Long-Term Stability – Maintains performance and integrity over extended periods.
• Adaptability – Easily adapts to any type of geometry, providing versatile application options.

Application Specific Instructions:

1. Deck surfaces must be dry, clean and free from sharp projections such as nail heads and concrete nibs.
2. When bonding the substrate should be prepared using a primer either Impridan 100, CURIDAN, MAXDAN or MAXDAN CAUCHO at the recommended rate prior to installation of the waterproofing system.
3. Where the membranes are adhered to insulation boards, the resistance to wind uplift will be dependent on the cohesive strength of the insulation and the method by which it is secured to the roof deck. This should be taken into account when the insulation material is selected.
4. At falls in excess of 5 degree (1:11) precautions against slippage, and requirements for mechanical fixing should be observed.
5. The membrane may be laid in conditions normal to roofing work and must not be laid in rain, snow or heavy fog, nor if the temperature falls below 5ºC, unless precautions against condensation have been taken.
6. The roofing layers must always be installed with staggered overlaps and in such a manner that no counter-seams in the direction of the outlets are made.
7. Attachment of reinforced bituminous membrane roofing maybe achieved by full bonding, by partial bonding or loose laid (ballasted); the choice should depend upon the type of substrate and the required resistance to wind uplift pressure.
8. The first layer is installed over the substrate, full bonded, partially bonded, or loose laid (ballasted). Fully bonded torch-applied membranes should only be used with non-combustible substrates and with surfaces designed to enable the torch application of subsequent layers. It is possible to install a torch-receivable first layer in hot bitumen, and then torch apply the second or capping sheet, which should be specifically designed for torching.
9. Bonding is achieved by melting the lower surface by torching and pressing the membrane down. Care must be taken not to overheat the membrane.
10. The first layer is installed with side laps of 60 mm and end laps of 75 mm. The top layer/cap sheet is laid over the first layer in the same direction, and fully bonded. The top layer/cap sheets are installed with side laps for the mineral surfaced membranes determined by the selvedge edge and for sanded or plastified top layers a minimum of 75 mm and end laps 100 mm wide.

INFORMATION: Attachment of reinforced bituminous membrane roofing can also be achieved by mechanical fastening with screws and stress plates or by nailing. Mechanical fastening of membranes is possible by installing a specially manufactured membrane mechanically fastened with screws and stress plates along the lap, with joints then sealed by torching, with subsequent layers fully bonded.  Nailing fastening of membranes is possible by installing a sacrificial specially manufactured layer mechanically fastened with screws and stress plates, or alternatively nails, with subsequent layers fully bonded.

Do you offer Free Delivery?

Yes! On most insulation orders over £400 excluding VAT, we can offer free delivery*. 

Delivery depends on stock availability and location. If stock is not available at your local branch and must be delivered from another branch, this may affect lead time or delivery charges. In this case, one of our advisors will contact you to confirm any changes. 

You can also send your enquiry via Contact Page or WhatsApp, and we will calculate the costs for you. We always aim to have your order travel the shortest distance possible to ensure free or the most economical delivery option. 

Orders below £400 excluding VAT are usually subject to a delivery fee of £50 excluding VAT. 

*Orders into central London (inside the North Circular and South Circular) will be charged on orders up to £1,000 + VAT due to increased shipping costs and congestion charges. Orders must also be above £350 + VAT to be processed.

Where do you deliver to?

We can deliver to 95% of the UK, using our branches across England, Wales, and Scotland. To check if you are in our delivery area, see the map or your postcode. 

London postcodes: BR, CR, DA, E, EC, EN, HA, IG, KT, N, NW, RM, SE, SM, SW, TW, UB, W, WC, WD. 

Other postcodes: AL, B, BA*, BB, BD, BH*, BN, BS, CA, CB, CM, CO, CT, CV, CW, DA, DD*, DE, DG*, DH, DL, DN, DT*, DY, EH*, EX*, FK*, FY, G, GL*, GU, HD, HG, HP, HU, HX, IP, KA*, KY*, L, LA, LE, LL, LN, LS, LU, M, ME, MK, ML, NE, NG, NN, NR, OL, OX*, PA*, PE*, PH*, PL*, PO*, RG, RH, RM, S, SG, SK, SL, SN*, SO, SP*, SR, SS, ST, SY, TA*, TD*, TF, TN, TQ*, TS, WA, WF, WN, WR, WS, WV, YO. 

Limited areas (PO – Mainland only; BA, BH, DD, DG, DT, EX,  EH, FK, GL, KA, KY, OX, PA, PE, PH, PL, SN, SP, TA, TD, TQ & PL) may have restricted delivery coverage depending on distance from the branch and order size.

Where will you deliver my order to?

All deliveries are kerbside only. It is your responsibility to move items from the kerb onto your property. The courier decides where the order is left, so please ensure there is ample space to offload.

Delivery access and site restrictions

These items are typically delivered on large 18T or 26T rigid lorries, approximately 10–12 meters long, 4 meters high, 2.6 meters wide, carrying 12–14 pallets.

Please inform us of any access restrictions or site issues in advance; failure to do so may result in extra delivery charges.

When do you dispatch orders?

If your order is placed before 12:00 PM, we aim to process and dispatch it on our lorries the next working day. Occasionally, lorries may be full, or stock may need to be brought in from another branch, which can extend delivery up to 10 working days. Some areas are subject to set delivery days due to distance from the local branch.

Please ensure to leave a mobile number so that we can contact you with your delivery date once we have received confirmation from the local branch. This also allows ourselves or the delivery driver to contact you if there are any issues with your delivery.

Why do we need your contact number?

It is essential to provide a mobile number so we or the delivery driver can contact you if there are any issues. For orders of this nature, we may contact you after ordering online to discuss delivery options, site restrictions, or offloading requirements.

How much will my delivery cost?

For orders over £400 excluding VAT, we can offer free delivery*. 

Delivery costs vary depending on the product and delivery location. When you add items to your basket and proceed to checkout, the delivery price will be displayed. We keep delivery costs as low as possible and only pass on the rates charged by our delivery partners.

How long will my delivery take?

Each product page shows the usual lead time below the “Add to Basket” button. These times are a guide only, and we aim to deliver your items as quickly as possible.