What size timber should I use for my pergola?
For the uprights you will need at least 75mm x 75mm (3” x 3”) timber, and 100mm x 100mm (4” x 4”) is better if it is to be a sizeable structure. The uprights need to be around 3m (10ft) long, as they will need sinking into the ground by 0.5m (2ft) to give a firm foundation.
Should I use 2×6 or 2×8 for pergola?
You also have to consider allowable span, based on the size of the pergola you’re building. A 12-foot span is much too long for a 2×6 board, for example. Not only will it look weak to the eye, but it will sag over time. Most builders use a minimum of 2×8 for the upper framing members, and that’s for a small pergola.
What size post should I use for a pergola?
A standard pergola will most often use 6 x 6 inch posts for support. A very small pergola may use 4 x 4 inch posts as long as it has less than 4 to 6 feet between posts. As a general rule of thumb the depth of hole you use for your posts should be approximately 1/4 of the height of your post.
How far can a pergola beam span without support?
How far can a double 2×8 span without support? When supporting joists that span 12 feet with no overhang beyond the beam, a double ply beam can span in feet a value equal to its depth in inches. A double 2×12 beam can span 12 feet; a (2) 2×10 can span 10 feet and so on.
Which is the best wood for a pergola?
A cedar pergola offers shade and natural resistance to weather, rotting, and insects. It’s a popular choice if you’re in the market for a wood pergola, and this model from Backyard Discovery is a top seller. This option includes everything necessary for constructing the 12 x 10-foot structure.
How big should the rafters be on a pergola?
Rafters should be spaced no more than 900mm apart. To preserve the life of the pergola it is important to coat the timber with an appropriate finish. All exposed timber will undergo colour change and some surface checking and erosion.
How long does it take for Pergola wood to dry?
Pressure treated pine requires that you install the pergola, then let the wood dry out completely before staining or painting. You will see it turn from green into a golden brown when the pressure treatment has dried. This could take 2-4 months depending on your location.
Which is the best timber to use outdoors and why?
Failure to use the best type of wood in particular outdoor setting might give you undesirable results. We found that in many cases, the problem is not of the kind of timber material in use but merely the failure of developers to understand the different species of wood, their installation procedure, suitability and also maintenance.