Treated Timber Firring Strips – Manufactured for Flat Roof Drainage

Our Firring Strips are cut from responsibly sourced, regulated timber and designed to create a gradual slope on flat roofs. This essential roof component helps promote rainwater run-off, prevents pooling, and ensures the correct drainage pitch for your roofing system.

Available Specifications

Option 1: 47mm x 100mm Timber (4.8m Length)

1. Width: 47mm
2. Taper: 94mm down to 2mm
3. Length: 4.8 metres

Cut from high-quality 47×100mm treated timber, ideal for larger flat roof builds or where a deeper fall is required.

Option 2: 47mm x 47mm Timber (3.6m Length)

1. Manufactured from 2” treated timber (47mm x 47mm)
2. Cut diagonally to create two strips
3. Taper: approx. 40–38mm down to 2mm

A cost-effective solution for smaller flat roofs and lighter applications.

Important Note

The cut edge is untreated, so additional treatment may be recommended depending on your installation type or exposure level.

Purpose & Applications

1. Creates the pitch/fall required for flat roof drainage
2. Prevents standing water and premature membrane damage
3. Suitable for EPDM, GRP, felt roofs, timber decks, garages, extensions, and warm roof systems
4. Easy to install and compatible with all modern roofing materials

Material

1. Made from regulated, sustainably sourced timber
2. Precision cut for consistent slope
3. Strong, durable, and suitable for outdoor construction

Sold As

1x Firring Strip (single piece)

Perfect for small DIY jobs or bulk contractor orders.

Here are 5 more great reasons to buy from us:

Returns are easy, if the items are�unopened and unused�then simply�contact us�for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

In the unlikely event that you find your item cheaper at another online store, just let us know and we'll beat the competitor's pricing hands-down.

We insist that you love everything you buy from us. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again.

Ordering from APEX Fibreglass Roofing Supplies is 100% safe and secureso you can rest easy. Your personal details are never shared, sold or rented to anyone either.

Here are 5 more great reasons to buy from us:

Returns are easy, if the items are�unopened and unused�then simply�contact us�for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

In the unlikely event that you find your item cheaper at another online store, just let us know and we'll beat the competitor's pricing hands-down.

We insist that you love everything you buy from us. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again.

Ordering from APEX Fibreglass Roofing Supplies is 100% safe and secureso you can rest easy. Your personal details are never shared, sold or rented to anyone either.