Here at Champion Timber, we’ve got everything you need for a loft conversion job.
We have quality timber joists and structural timbers at a range of lengths in stock. We also carry all the fittings, tools and accessories you need to get the job finished.
We’ve got branches across West London, Surrey and Kent. Our trained yard staff can help you get everything you need in one easy visit. You can also order online or by phone for free next-day delivery to your site or yard. Champion Timber is the trade choice for timber joists and quality construction timber.
Joistmate Xtra timber joists and accessories
At Champion Timber we source, select and machine our timber in-house. Our timber is of great quality and consistent as a result. This gives you peace of mind when ordering structural timbers, such as timber joists. We can even do bespoke timber for those jobs that are a bit out of the ordinary.
Our Joistmate Xtra line of timber joists is kiln dried, pressure treated with Tanalith E and strength graded up to C24. Because we machine the timber joists ourselves we’ve got a wide range of sizes in lengths up to 6 metres.
See the full range of Joistmate Xtra timber joists
Save time and money with Champion timber joists
The quality of our products means you’ll get straight, consistent timber joists with fewer knots. The higher strength allows you to use smaller timbers for the same spans — all within the regs. With eased edges, these timber joists are easier to handle too. That makes working at height safer and reduces your time on the job.
Joist hangers, straps and fixings
Find the right joist hangers for your next job
We also stock steel restraint straps, sheradised twist nails and other fixings for timber joists.
Dormer windows and other structural elements
Treated softwood
We have a wide range of treated structural timbers for purlins, knee walls and dormer shells.
Sawn firrings
We also stock treated softwood firrings in identical and folding pairs for flat roofing.
Battens
Our pressure-treated battens meet the latest BS 5534 certification for roof tiling. We’ve also got a massive range of sawn and planed timber for interior battening.
Download our timber brochure for details of our range
OSB board
For wall sheathing and roofing of dormer windows, our OSB board is a great value alternative to ply. We can supply 2240mm x 1220mm sheets at 11mm or 18mm thick. Exterior T&G sheets at 2400mm x 600mm x 18mm are also available.
Velux windows
For loft conversions with roof lights, we stock Velux windows in sizes from 550mm x 780mm to 1340mm x 1400mm. We also supply Velux flashings to suit different tile types.
See our full range of Velux windows and flashing
Flooring: sheet materials, insulation and soundproofing
For boarding out we have a full range of sheet materials suitable for flooring. We also supply thermal and sound insulation at different thicknesses to fit your build.
Insulation
Our range of insulation can fit all project budgets and requirements. Low-profile insulation boards will suit situations where you’re installing timber joists alongside existing joists. Mineral wools provide a cheaper alternative where the cavity depth allows.
Rockwool
Available in 100mm and 150mm thicknesses. Our perforated Rockwool rolls are easy to fit between timber joists with standard 400mm centres. Lightweight, fire resistant and CE/CPD compliant, Rockwool also helps absorb sound. We also stock semi-rigid Rockwool slabs at 600mm widths.
See our range of insulation for loft floors
Glass fibre
Non-combustible (Class 1 Surface Spread of Flame) glass fibre has long been the insulation of choice where materials cost is a concern. We carry 100mm and 170mm thickness space saver rolls — both of which are rated as CE/CPD compliant.
See our range of insulation for loft floors
Celotex insulation board
Where you need high-performance, low-thickness insulation, Celotex insulation boards are a good option. Low U values make insulation boards around twice as effective as equivalent mineral wool options. We supply Celotex insulation boards as 2400mm x 1200mm sheets in a range of thicknesses. Lightweight and easy to cut to size, Celotex boards are rated as Class 1 for Surface Spread of Flame and CE/CPD compliant.
See our range of insulation for loft floors
Monarfloor Acoustic Deck 18
Designed for overboard existing timber floors, Monarfloor Deck 18 is made up of an 8mm soundproofing foam bonded to an 18mm moisture-resistant V313 P5 chipboard. Supplied in 2400mm x 600mm tongue and groove sheets, Monarfloor Deck 18 can reduce airborne and impact sound by 49dB.
Sheet materials for flooring
OSB board
Our OSB boards are a great value alternative to plywood and are rated for flooring use, meeting the standard for OSB/3 under BS EN 300: 2006. Made up of 3 layers of cross-oriented timber strands bonded with a waterproof resin, OSB boards are strong and consistent in quality, without voids or knots.
Available as straight-edged 2440mm x 1220mm boards or TG4 half sheets.
Plywood
Choose from half sheets of flooring-specific plywood with tongue and groove on all 4 edges, or hardwood throughout at 2440mm x 1220mm. Rated to EN636-2S for the T&G ply and EN636-3S for the hardwood throughout, Champion’s plywood is hardwearing and easy to work with.