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Sawn and Treated Timber – Everything You Need To Know.

MP Moran is a long established supplier of Sawn and Treated Timber (sometimes called Rough Sawn Timber or even Carcassing Timber) located in the London and Hertfordshire area, providing C16 and C24 graded timber for commercial or domestic projects. If you need treated timber prices this is the place for you to browse an extensive product range in C16 and C24 strength grades. We deliver across; London, Bedfordshire, Buckinghamshire, Hertfordshire, Essex, Berkshire, Surrey, West Sussex, East Sussex and Kent.

Our treated timber and carcassing timber is sourced from some of the leading manufacturers and suppliers in the industry, we work hard in building up strong relationships to make sure that our customers get the highest quality product to ensure longevity in whatever they are doing.

Our treated timber is available in a wide range of sizes, making it ideal for both smaller and larger projects. Each timber size is regularly price checked to make sure all of our customers are getting the best, competitive rate - saving London and Hertfordshire builders money as much as we can.

Also available on a next day delivery basis, our treated timber can be delivered to the door of your project, making sure that none of your deadlines are put on hold due to you waiting on additional materials. Our award-winning transport fleet is made up of the most up to date vehicles, with our staff specifically trained in health and safety to ensure that these large timber products are transported safely. What’s more, we also look to helping our environment and aim to reduce our carbon footprint as much as possible.

If you would like more information on any of our treated timber, or you would like to find out more about any of our services and company goals, please get in touch with a member of our team either in one of our branches or by calling 01923 831 686.

What is Treated Timber?
Our treated timber is pre-treated with Osmose Naturewood. By specifying timber that is treated with the appropriate end use it will ensure its long life. Our treated timber products meet a variety of British and European standards, the Highways agency and NHBC. The treatment preserves the timber making it useable for external, moist and wet conditions. Plus is guards timber against attack from various

The types of preservation system available are;
Protim - an organic system that pressure treats timber used in construction projects, where the required protection is to Class UC1, UC2 and UC3.
When using Protim in an external environment it should be coated with an external coating.
Celcure preservation system is used for wood that has been treated with an Osmose preservative system. It also preserves the timber to Classes UC1, UC2, UC3 and UC4.
MicroPro - is a preservation system is also used for timber that has been tretaed with Osmose. It again protects the timber to Classes UC1, UC3 and UC4

Treated Timber Class Table.
Class 1 - Above ground, covered. Permanently dry, risk of insects.
Class 2 - Above ground, covered. Occasional risk of getting wet.
Class 3a - Above ground, coated. Exposed to frequent wetting.
Class 4 - In contact with the groud or fresh water. Permanently exposed to wetting.

What is the Timber Preservation Process
1. Timber is transferred into a treatment vessel
2. A vacuum pulls the air out of the vessel
3. Osmose preservative then fills the vessel
4. The vessel is pressurised forcing the preservative into the timber
5. The preservative is removed and a final vacuum is applied
6. The timber has now completed the Osmose preservation process

Treated timber guards against attacks by these wood boring insects and fungi.
Common Furniture Beetle
Wood boring weevil
Death Watch Beetle
House Longhorn Beetle
Termites
Dry Wood Termites
Subterranean Termites
Cellar Fungus
Pore Fungus
Dry Rot

What is Off Sawn Timber and Rough Sawn Timber?
A trade term for sawn timber is ‘Off Sawn Timber’. This simply refers to the tree trunk being sawn by a large band saw leaving sawn sections. The sawn sections are obviously fairly rough in finish…these sections are called Off Sawn Timber.

Another trade term is rough sawn timber, which means exactly as above...where the tree trunk is cut by a band saw, giving it a rough 'unfinished' surface. The surface is then finished by sanding to create a smooth surface finish.

Rough Sawn Timber should nto be used for structural purposes as it has not been strength tested / graded for this purpose.

What is Graded Timber?
Timber is strength graded to C16 or sometimes C24 which is the equivalent to BS EN 14081 and BSEN519:1995
C24 is a stronger grade than C16.
C16 graded timber kiln dried is mainly used on internal floor joists and roof joists. Online we offer lengths up to 6.0m - although longer lengths are available on request.
C16 treated timber is specified when the strength is required in an outside environment. Treated C16 timber is often found in roof rafters, timber framing, ceiling joists, floor joists and deck joists and other garden buildings.

What are the Standard Lengths of Timber?
Sawn timber comes in these standard lengths and then plus thickness (mm) listed in the table below;

1.8mtr / 2.10mtr / 2.40mtr / 2.40mtr / 2.7mtr / 3.0mtr / 3.30mtr / 3.60mtr / 3.90mtr / 4.20mtr / 4.50mtr / 4.80mtr / 5.10mtr / 5.70mtr / 6.0mtr / 6.30mtr

Note; Not all of these lengths will be available to stock.

Key:
Sawn Size is the dimension after the timber is sawn, but not yet planed to a smooth finish.
Finished Size is the dimension after planning, so always a few mm less than the sawn.

Some timber merchants / tradesman still work in inches which is why the size chart covers both options.

Sawn Size

Regularised Size / Finished Size mm/in

47mm x 50mm
1.85 x 2ins

45mm x 45mm
1.75ins x 1.75ins

47mm x 75mm
1.85ins x 2.95ins

45mm x 70mm
1.75ins x 2.75ins

47mm x 100mm
1.85ins x 4ins

45mm x 95mm
1.75ins x 3.75ins

47mm x 125mm
1.85ins x 5ins

45mm x 120mm
1.75ins x 4.75ins

47mm x 150mm
1.85ins x 5.90ins

45mm x 145mm
1.75ins x 5.70ins

47mm x 175mm
1.85ins x 6.9ins

45mm x 170mm
1.75ins x 6.70ins

47mm x 200mm
1.85ins x 8ins

45mm x 195mm
1.75ins x 7.7ins

47mm x 225mm
1.85ins x 8.85ins

45mm x 220mm
1.75ins x 8.66ins

75mm x 75mm
3ins x 3ins

70mm x 70mm
2.75ins x 2.75ins

75mm x 100mm
3ins x 4ins

70mm x 95mm
2.75ins x 3.75mm

75mm x 150mm
3ins x 6ins

70mm x 145mm
2.75ins x 5.70ins

75mm x 175mm
3ins x 6.9ins

70mm x 170mm
2.75ins x 6.7ins

75mm x 200mm
3ins x 7.8ins

70mm x 195mm
2.75ins x 7.7ins

75mm x 225mm
2.95ins x 8.85ins

70mm x 220mm
2.75ins x 8.7ins

What Lengths do 4.2ins come in?
4x2 Inches is also 100mm x 50mm - these dimension would be the sawn dimensions or the nominal dimension, prior to the timber being planed to create a smooth finish. The finished dimension would be around 95-97mm x 47mm
4x2 is generally available in; 3.0, 3.6, 4.2, 4.8 metre lengths.

What price is your 2x4 timber?
This is one of the most common question we get asked.
Price can be obtain via the link below.
https://www.mpmoran.co.uk/47x100mm-sawn-treated-timber-c16-10354006

What is Treated Timber used for?
The location of where the timber is going to be used determines how you should use it.

Internal Use Permanently Dry
The timber is commonly used for constructing Pitched Roofs, Floor Boards, Architrave and Skirting, Upper Floorboards.

Internal: Some Wetting
Tile battens, timber built frames (like stud walls), timber in roofs where condensation could be a problem, timber in flat roofs, ground floor joints and upper floor joists.

External: Subject to frequent wetting
Roof soffits, fascias and bargeboards, cladding, guttering and external loading timbers

External: Fencing and boarding, agricultural use but not subject to ground contact, landscaping and decking use but again not in contact with the ground.

External: Permanently in the ground or in permanent water contact
Fencing posts and gravel boards, agricultural use and in contact with the ground, retaining walls of earth (like sleepers), playground areas and gates.

External: Permanent ground and water contact
Marine use, piers, jetties, sea defenses and ship building.

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