2400mm GRP Mark 2 Window Base Unit With One Bracket Image

2400mm GRP Mark 2 Window Base Unit With One Bracket

SKU: BA24SW2

Strong GRP Construction: Manufactured from rigid glass reinforced plastic for exceptional strength and durability.
Fast & Easy Installation: One-piece moulded base with attached bracket for simple fitting.
Integrated Window Board: Includes a 12mm mahogany plywood window board for a high-quality finish.
Optional PVC Skin: Top surface can be bonded with PVC skin to create a strong, long-lasting window board.
Low Maintenance & Guaranteed: Maintenance-free design with a 10-year extended guarantee, manufactured under ISO9001 standards.

Description

2400mm GRP Mark 2 Window Base Unit with One Bracket

Seamless Dual-Sided GRP Base Unit with Full Insulation

The GRP Mark 2 Window Base Unit represents a revolution in GRP closed-tool moulding technology. Unlike traditional base units with seams or joints, this innovative design delivers a complete double-sided finished base with no weak points—making it the first of its kind in the industry.

Fully insulated with high-density polyurethane foam, the Mark 2 base forms both your internal and external sills in one seamless unit, providing strength, energy efficiency, and long-term durability. A timber insert is encapsulated inside for easy, invisible fixing, making installation quicker and more straightforward than ever before.

Available in a range of finishes—including two shades of white, chocolate brown, light oak, rosewood, and anthracite grey—the Mark 2 base unit is designed to complement the most popular window profiles.

✅ Key Features & Benefits

Revolutionary GRP Moulding – Closed-tool process creates a seamless, double-sided base with no weak joints.
Dual-Sided Finish – Forms both internal and external sills in one piece.
Fully Insulated – Polyurethane foam core improves thermal performance and soundproofing.
Encapsulated Timber Insert – Allows invisible, secure, and easy installation.
Durable & Maintenance-Free – Strong GRP design requires minimal upkeep and resists weathering.
Quick Installation – Saves significant time and labour costs on-site.
Colour Options – Available in 2 shades of white, chocolate brown, light oak, rosewood, and anthracite grey.
Sizes Available – 1800mm & 2400mm lengths to suit different window openings.
Complete Kit – Supplied with fixing bracket and GRP bracket cover.

📏 Specifications

Size: 2400mm (also available in 1800mm)
Material: Glass Reinforced Plastic (GRP)
Insulation: Polyurethane foam core
Insert: Timber encapsulated for fixing
Finish: Dual-sided seamless moulding (internal & external sills)
Colours: White (2 shades), Chocolate Brown, Light Oak, Rosewood, Anthracite Grey
Supplied with: Fixing bracket + GRP bracket cover

💡 Installer’s Note: The Mark 2 base unit is designed to work seamlessly with GRP Bow Bay Canopies, offering a faster, cleaner, and more efficient bow window installation with built-in insulation and long-lasting durability.

Technical Information

Weight: 2.30 Kg
Colour: 6 Colour
Material: GRP
Guarantee: 10 Years Manufacturers
Lead Time: Into Order 5-7 Days

Delivery & Returns

Delivery

The despatch timings we publish are estimates and due consideration needs to be made when making purchases with tight deadlines and as such we shall not be liable for any losses, costs, damages, charges, or expenses caused by any delay for delivery of the goods.

Returns Policy For Brissco Online

We appreciate that there may be occasions you may wish to return items. To help you with this process please see our returns policy below.

Returning an item – Damaged

In the event you receive damaged goods we will arrange a replacement item for you. However, it is your responsibility to notify us within 72 hours of receipt that an item has been received damaged (please see risk below).

Returning an item – Risk

On receipt of the delivery you, the customer, are responsible for those goods and any loss or damage to the goods shall be at your own risk.

Returning an item – Incorrect

If you receive incorrect goods it is your responsibility to notify us within 72 hours of receipt at which point we will make the necessary arrangements.

Delivery shortages

Firstly, our carrier delivers parcels/packages. Any shortages of them must be reported to the driver on receipt. Secondly, shortages of contents of the parcel(s)/package(s) against the enclosed Brissco advice note must be made within 72 hours.

PDFs

Spec Sheet

Fitting Instructions

FAQs

1. What is the GRP Mark 2 Window Base Unit?

It is an advanced base unit manufactured using a revolutionary GRP closed tool moulding process, creating a seamless, double-sided finish with no weak seams or joints.

2. How does the Mark 2 differ from the Mark 1 base unit?

Unlike the Mark 1, the Mark 2 is fully insulated with polyurethane foam, has a seamless double-sided finish, and forms both internal and external sills in one complete unit.

3. What sizes are available?

The base unit is available in 1800mm and 2400mm lengths to suit different bow window installations.

4. What colours can I choose from?

It is available in two shades of white to match most profiles, as well as chocolate brown, light oak, rosewood, and anthracite grey.

5. Is the unit insulated?

Yes, it is fully insulated with polyurethane foam, providing excellent thermal efficiency.

6. Does the unit include installation accessories?

Yes, it comes complete with a fixing bracket and a GRP bracket cover for a professional finish.

7. What does it mean that the unit forms both internal and external sills?

The design ensures that the unit incorporates both the interior and exterior window sills in one seamless product, saving installation time and effort.

8. Is there timber reinforcement inside the base?

Yes, the unit encapsulates a timber insert, which allows for invisible and secure fixing during installation.

9. What are the main benefits of this product?

It reduces installation time and cost, eliminates weak seams, improves insulation, and provides a seamless professional finish.

10. Who is this product ideal for?

It is perfect for installers and homeowners who want a high-quality, fully insulated, easy-to-install solution for bow window projects.