decking frame with screws

When shopping for outdoor decking, many people only think about the colour and style of the decking board. Most forget about what goes under the deck. Not the dirt, the deck frame.

Constructing a sturdy deck frame requires careful thought. If your frame posts are in or touching the ground, you’ll need to ensure the pine is properly treated (H4 and above). If you use untreated wood or choose timber with the wrong treatment, your deck frame can be susceptible to insect damage or decay.

Let’s take a closer look at why pine is the preferred timber for deck framing and what varieties of treated pine are available.

What are the benefits of a treated pine deck?

Pine plantation

There are three obvious benefits when using treated pine for your decking. 

  • Strength
  • Cost Effectiveness
  • Durability

Why is treated pine so strong?

installing treated pine deck

While pine may technically be a softwood, it has an extremely high compressive strength. Even under heavy loads, pine will not fracture. In fact, the compressive strength and bending strength of pine is on par or better than many hardwoods. For those DIY’ers who are building their deck frame, pine is the perfect wood because it’s lightweight and easy to cut. 

Get more for your money 

Managed treated pine plantation

In short, pine is a cheaper alternative to other timbers. Pine trees grow fast, require less care while growing and are often grown in government-run plantations. The regular supply of pine keeps the price lower than its hardwood counterparts.

Treated pine is long lasting

waterproof deck with treated pineframe

With the correct treatment applied, pine deck frames have been shown to enjoy a long lifespan. While it’s difficult to say exactly how many years you’ll get out of your pine structure, a lot depends on the purpose the pine is used for, i.e.  whether used in or above ground and the surrounding climate conditions.

Choosing the right treated pine for your deck?

Treated pine decking frame min

Treated timber is divided into six categories. They are classified according to their hazard (H) class. The higher the number, the greater the level of treatment. 

H1 – H1 treatment is designed to reduce the chance of insect or termite attack. You should use H1 treated timber in well-ventilated areas. The timber should be kept away from the ground and not be exposed to the weather – especially moisture. H1 timber is generally used indoors for flooring and furniture.

H2 – H2 treated timber is slightly more resilient than H1. While it’s still advised to only use this treated timber indoors, the area your timber is located doesn’t need to be as well ventilated. H2 also minimises insect attacks.

H3 – This type of treated pine is commonly used for deck frames. The wood must be kept off the ground with a minimum clearance of 50mm, but it can be exposed to moderate wet weather. H3 treated pine is perfect for pergolas, decking and cladding.

H4 – If you need to install your timber in the ground, H4 is the lowest level timer that is safe to do so. The treatment will reduce insect and fungal attack, even if installed in ground that is constantly damp. H4 treated pine is ideal for fencing posts, landscaping timber, pergola posts and, of course, deck frame posts.

H5 – If you need to install timber in the ground or freshwater for long periods, H5 treated timber can handle the task. The treatment is designed to protect against extreme decay as well as to deter attacks from insects.

H6 – Carrying the highest protection level, H6 treated timber is commonly used for boat hulls, jetties and similar applications that are exposed to seawater. The H6 treatment reduces the chance of extreme decay or attack from marine wood borers. 

If you want to find out more about treated pine for your outdoor deck frame, talk to the experts at Decking Perth. We can help you choose the right treated pine for your project to ensure you get the longest life and prevent any nasties like moisture or termites from damaging the wood.

Contact Decking Perth today.  

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Our customers say

We couldn't be more pleased with the result of our new decking built by Dean and his team from Allstyle Build using composite decking sourced from Decking Perth. Dean's customer service and attention to detail was really appreciated and his pricing was value for money given the excellent result. Wouldn't hesitate recommending both Allstyle Build and Decking Perth's products for any decking project.
Paul Hamersley
Paul Hamersley
11:43 24 Mar 22
Ive just had my new composite deck supplied by Decking Perth. The whole process was so easy and professional. James and Eric from JLA Carpentry did a fantastic job doing the installation. The workmanship is top class. Highly recommended.
Steve Blight
Steve Blight
04:46 09 Mar 22
I had no idea where to start when it came to getting decking installed. I was so pleased when I found Decking Perth because they did all the tricky stuff for me - all I had to do was tell them what I was after and what colour and they did the rest. The contractor I ended up choosing to do the instal was fantastic. Couldn't be happier with my new deck! So thank you!
Kealy Hardman
Kealy Hardman
08:12 19 Feb 22
We had our front entrance decking replaced with the composite product - Spanish Saffron colour - and am super happy with the outcome. The service and advice/options provided by Perth Decking was very professional and Eric and his team did a fantastic really great job.Recommend Perth Decking and their teams without any hesitation.
Nico Spangenberg
Nico Spangenberg
10:35 13 Feb 22
Mazlin Junid
Mazlin Junid
03:04 09 Feb 22
Highly recommend Decking Perth. They were super helpful from the initial shop visit to the many questions and queries I had, right through to the installation by the fantastic Jake. Cannot fault.
anna wingell
anna wingell
09:35 17 Jan 22
Fantastic experience from start to finish. Ashleigh at Decking Perth was very helpful and the installers Michael and Liam from Lesgo Construction were reliable, friendly, on time and did a quality job. Nothing was to much trouble and I would definitely use them again..
Rod Wright
Rod Wright
10:40 13 Dec 21
Great service and product
Ryan C
Ryan C
05:12 13 Oct 21
Decking Perth provide great advice for novice deck buyers by showing you a wide range of products underpinned by knowledge and a conduit to deck builders. A couple of days after we visited Decking Perth one of their preferred contractors provided a very competitive quotation and we engaged AllStyle Carpentry. Decking Perth supplied all materials as they are a One Stop Shop for the contractor. The Modwood Xtteme deck looks fantastic and we could not be happier with it. Thank you Decking Perth as your business supported our thinking and your advice saw the planning come together and we now have a lovely deck.Phill Cribb
Phill CRIBB
Phill CRIBB
10:14 21 Apr 21
Could not recommend Deck Perth more. I had a small area at the front of my house which needed Composite decking supplied and installed. Visited their shop for ideas, then they organised a contractor to attend for a quote to install. All done within 2.5 weeks and over the moon with the end result at a reasonable price, thanks again
Owen Taylor
Owen Taylor
04:01 08 May 20
I contacted Decking Perth regarding an extension to our current Trex Deck. They took my details and within 4 hours I had been contacted by 2 decking installers and both had attended and quoted within 3 days. Jamie from Elite Decking had the job completed the following week! Lovely team, quiet, clean and tidy workers, on time and on budget, attention to detail exceptional. You cannot tell the difference between the 5 year old deck and the new extension. Highly recommend Elite Decking and Decking Perth.
Louise Bray
Louise Bray
06:27 28 Jan 20
I had some Trex (tiki torch colour) decking installed just before Christmas 2019. Jamie was great to deal with and did a great job installing the product. He and Phil were also very helpful in choosing the best product. Thanks guys! I have no problems recommending Decking Perth to others.
Peter Coulson
Peter Coulson
23:30 05 Jan 20
Great service, professional products.And easy to deal with
Dean Bumbak
Dean Bumbak
19:02 04 Dec 19
As an ordinary DIY supported by a Team of Rockstars to achieve a tremendous result and nothing was too much trouble Cristian and Cassandra.
Aaron Henley-Martin
Aaron Henley-Martin
07:36 22 Nov 19
We were seeking a good quality decking oil for our garden landscaping and out-door shower project. We found the reviews on-line for Cutek Extreme Clear wood preserver were very good and suited us as it is absorbed by the timber thereby ensuring greater life expectancy and a great grain enhancer. In addition re-coating every 18mths to 2yrs appealed as the timber only requires a high pressure wash and a dry off period before re-coating. No sanding required. We chose a New Bronzetone tinter to deepen and enrich the merbau timber grain for an excellent aesthetic finish. Next Project the pool deck!
Chris Pallett
Chris Pallett
04:13 08 Nov 19
Marty Brausch
Marty Brausch
08:47 29 Jul 19
I contacted Decking Perth to see about getting my small courtyard sorted. Cassandra recommended 2 companies to install Trex decking. Marty and his team did a great job. I'm really pleased with the results.
Belinda G
Belinda G
03:34 13 May 19
I use Decking Perth as timber and composite decking supplier, and have dealt with Adrian for years. The team are passionate and strive for innovation, always presenting the latest products to benefit the end user. I'm grateful for their knowledge and desire to see the best fit for purpose product for both client and contractor alike.
Matt Libardi
Matt Libardi
12:47 15 Apr 19
I contacted Decking Perth to get my alfresco area upgrade to latest trex decking. She recommended two subbies however I choose one subiie who is Easy Deck. It was highly impressive to note the way specially Casandra how she provided total service package including resource, material and also best economical options. This is the best customer service i ever had experienced. follow up on work progress, quality control etc are other events Cassendra followed up with customer. it was very impressive work indeed by Easy Deck and Decking Perth.
Great job at a fair price. Thanks Joe!
Steve Collins
Steve Collins
04:25 20 Aug 18
Aaron East Landscape Designs used Trex decking and did an absolutely awesome job. Very professional. Would highly recommend them for decking and landscaping
Kelly Berry
Kelly Berry
03:27 01 May 18
21m2 of decking needed around pool area. Decking Perth provided an easy service to get the job done quickly and at a very good price. Installation contractors were switched on and provided smart options to get around a couple of problem areas. Cannot fault the installation, it is fantastic and sets off the pool area fantastically.Can highly recommend Decking Perth to anyone.
Tim Waldby
Tim Waldby
13:47 05 Oct 17
Sharon Moieni
Sharon Moieni
06:14 26 Sep 17
Made the quoting process very simple and easy and checked in regularly to make sure that we were happy with the process and the finished job.
Samantha Stenersen
Samantha Stenersen
02:06 15 Sep 17
Adrian and the team were extremely pleasant to deal with and provided friendly and informative service throughout the sales process. A thoroughly positive experience from start to finish and the Trex products we purchased look outstanding.
Jon G
Jon G
07:06 12 Sep 17
The service provided by Adrian at Decking Perth was exceptional in helping us select our decking and providing advice regarding the laying. The Torona Brown Trex decking looks great. Neville
Neville Jones
Neville Jones
04:58 06 Sep 17
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