The SB Lay 11m Felt Underlay is a high-performing jute felt underlay designed to reduce impact sound in carpets or solid timber flooring. Its unique density ensures that footfall noise is minimized, making it an ideal choice for domestic use. It is also quick and easy to install, providing excellent acoustic performance. This underlay is recommended for use as a simple underlay in domestic situations, as it reduces the passage of impact sound from the carpet or timber final floor finish to the structure.

Specifications

Fibre Composition	Hair/Jute/Mixed Fibres (100% Recycled)
Nominal Weight	1695g/m² (+/- 5%) (50oz/yd²)
Nominal Thickness	11.00mm (+/- 0.5mm)
Roll Width	1.37m
Roll Length	12.5m
Standard Roll Area	17.125m²
Flame Retardancy	BS4790:1987 (Hot Metal Nut Test) Endurance FR achieves a 'low radius of effects of ignition' - no more than 20mm against maximum permitted of 35mm for low radius classification.
Static Loading	BS4939 Thickness loss after 24 hours loading and 24 hours recovery: Retained FR50 56%
Sound impact	BS2750 Part 8:1980 Weighted impact sound improvement 24db
Thermal Resistance	BS3745 2.5 Togs

Performance

The SB Lay 11m Felt Underlay is designed to provide excellent acoustic performance by reducing impact sound transmission. It has been tested and proven to achieve a weighted impact sound improvement of 24dB according to BS2750 Part 8:1980.

Features and Benefits

• Environmentally friendly: Made from 100% recycled hair, jute, and mixed fibers.
• Easy to handle: Can be easily trimmed with scissors and is pleasant to handle, with no risk of skin or respiratory irritation.
• Excellent insulation: Provides superior thermal and sound insulation, reducing energy loss and noise transmission.
• Durable: Designed to withstand heavy foot traffic and extend the lifespan of your flooring.
• Moisture resistant: Helps to prevent moisture from seeping into the subfloor, protecting your flooring from damage.
• Enhances comfort: Adds a layer of cushioning underfoot, making your flooring more comfortable to walk on.
• Reduces impact noise: Minimizes the sound of footsteps and other impact noises, creating a quieter living environment.
• Improves energy efficiency: Acts as an additional barrier against heat loss, helping to reduce energy consumption and lower heating costs.
• Easy installation: Can be easily rolled out and secured in place, saving time and effort during installation.
• Compatible with various flooring types: Suitable for use with a wide range of flooring materials, including carpet, laminate, and engineered wood.

 

Installation

Full fitting instructions are provided with all products and can be downloaded from the Installation Guides section.

 

Certifications

• BS4790:1987 (Hot Metal Nut Test)
• BS4939 (Static Loading)
• BS2750 Part 8:1980 (Sound Impact)
• BS3745 (Thermal Resistance)

Equivalent/Related Products

• SB Lay 9m Felt Underlay
• SB Lay 13m Felt Underlay
• SB Lay 15m Felt Underlay

Product Specifications

• Brand: Sound Barrier - SB
• Size Per Product (L x H x D): 1.37m x 12.5m x 17.125m2
• Size Per Product (L x H x D): 1
• Weight: Kg
• Coverage: 17.125m2

-Datasheet 1 -Datasheet 2

SERVICED LOCATIONS

We offer our customers free delivery* when you spend £400 plus vat or more. For orders less than £400 ex VAT there is a delivery charge of £75 ex VAT. This will be calculated within the checkout process. We only accept orders Monday through Friday. We do not provide delivery on weekends.

Currently affected areas : IP, NR, CA, TD, CT, PO, SO, BH, DT, EX, PL, SP, TA, TQ, TR, LL, HR, SY **

This is currently due to the lack of availabily of drivers in these service areas and limited supply in these areas, thus a custom shipping service charge may apply. (£250). Please use the shipping calculor to give you an accurate shipping price based on your post code. We apologise in advance if this occurs for your order. Before placing an order please get in touch with the team and we will see if anything can be done for your order specifically.

There are parts of the UK that we don't deliver to and this will be marked at checkout. (N Ireland and Scotish Highlands). If this occurs upon your checkout, please reach out the team and we will see what we can do via a 3rd party supplier.

PREFERED DELIVERY TIMES

We offer this service to alleviate confusion for you and reduce communication for us all. It gives us an idea on when you would the order to be delivered. It is NOT a garaunteed delivery date.

We understand scheduling of larger materials to your project is important, thus having your preference is very helpful for us. Please note this works in tandem with the availability of the product. We can NOT fulfill any orders before the avability days set on the product, even if the date insert tool allows it.

There may be situations where if specified a preference date is given, we may not always be able to deliver on that date. As it also linked to you delivery location, the closest warehouse logistics rotar, availability of the product and more. We have simply offered this to help our customers out, please be reasonable with your expectations in these difficult times. We WILL do our best to comunicate accurate delivery times via phone or email after the order is placed, so no need to worry.

After you specified a date we will do our best to deliver on that date, you will be notified within 24-48 hours if we can not fill that day but will strive to get a slot as close as possible to that date. We do not deliver on weekends, so all orders specified with weekend delivery will be shifted to the week after.

On weekdays, our cut-off time for purchases is 1 p.m. Orders must be placed by 1 p.m. on Monday through Thursday to be delivered the next day if they are applicable for next day. For example, an order placed after 2 p.m. on Friday will be sent out on Monday afternoon (if it is not too late).

PRODUCT DELIVERY TIMES

The vast majority of our orders are dispatched within 2–5 working days. However, if you need a customized or bespoke item, things will take longer to arrive. Some goods are on allocation or short supply as a result of COVID 19 and the Brexit. We may be forced to offer an equivalent high-quality substitute product at no extra cost to our customer from time to time.

The delivery charge is applied for shipments to England. If you live in Scotland or Wales, one of our customer care specialists will contact. We do everything we can to make sure packages arrive on the date promised.

If you change the delivery date given at the time of purchase, you will be notified by email or phone. We reserve the right to charge a failed delivery fee if access is restricted for the car specified on the order, and a delivery cannot be completed.

Every transaction is recorded, and the delivery fees are determined on whether or not the recipient is ready to receive the package. This covers manual or automated offloading of heavy items. Offloading equipment, such as a tail lift or forklift, may be requested; however, there may be an additional fee if the site is difficult to access or the products are of considerable size..

On weekdays, our cut-off time for purchases is 1 p.m. Orders must be placed by 1 p.m. on Monday through Thursday to be delivered the next day if they are applicable for next day. For example, an order placed after 2 p.m. on Friday will be sent out on Monday afternoon (if it is not too late).

RESTRICTED ACCESS

If We Or A Supplier Attempt A Delivery And Customer Refuses To Deliver, We Are Not Liable For Any Losses Incurred As A Result Of Our Failure To Notify Us Or The Supplier About Any Access Limitations

At The Time Of Placing The Purchase Or 24 Hours Before Delivery. Delivery Will Be Managed With Below Partners Or 3rd Party Fulfilment.

ACCEPTING YOUR DELIVERY

Upon receiving your delivery, please thoroughly examine all items before signing.

If you notice any issues, such as damage or defects, please refuse the delivery and get in touch with us immediately by calling 02039 916 406 or email sales@londonbuildingsupplies.co.uk.

Important Reminder: Deliveries signed as “unchecked” will be considered to have been received in good condition.

Once your order is delivered to the specified address, responsibility for any loss or damage is transferred to you.

We believe in keeping our pricing transparent. Rather than embedding transport costs into product prices, we calculate carriage charges based on the size and weight of your order. These charges are clearly displayed separately during checkout, ensuring clarity and fairness.