Building Pergolas With a Perfect Finish

1 hour ago

2 min read

A well-designed and built pergola can define an outdoor space – adding structure and architectural character, while creating a natural setting for outdoor living

The quality of a finished pergola comes down to the details. The choice of timber, treatment, fixings and finishes all shape how the pergola looks, performs and lasts. For landscapers, four key considerations can make the difference:

Timber stability – choose timber that will resist twisting and warping.
Treatment – match the treatment level to the application, particularly for posts installed in-ground.
Fixings and connections – consider how brackets, bolts and plates will affect the finished look, and whether concealed connections are possible.
Coatings – decide early whether the timber will be painted or exposed and select coatings accordingly.

Engineered Timber, Made for Life Outdoors

Engineered timber specialist Prolam has developed pergola solutions around these four priorities.

Made by bonding layers of structural grade timber, glulam beams, posts and rafters are stronger, straighter and less prone to twisting and warping than solid timber.

For superior durability, Prolam H3.2 beams and rafters and CodeMark H5 posts (certified for in-ground use) are treated to provide long-term protection against moisture, decay and boring insects.

For a cleaner, contemporary pergola look, Prolam and SPAX have developed an invisible beam-to-post fixing system that removes the need for visible brackets. Structural screws are installed through the beam into the post, creating a concealed connection that is straightforward to install.

Prolam visual glulam is graded for a knot- and defect-free appearance, making it suited to both painted pergolas and designs where the timber is stained or oiled.

The company also offers a Pergola Design Service at no cost for standard designs, with the flexibility to tailor pergola dimensions, fixing options and finishes. Once finalised, the beams, rafters and posts are delivered as a build-ready kitset to your local timber merchant.

Pergola or Roofed Structure?

Under the Building Code exemption, a pergola may be attached or freestanding but must remain unroofed. If a roof is added, different building consent requirements may apply – check the requirements before construction.

Find pergola design information and technical resources at prolamnz.com/prolam-pergola