Saturday, June 20, 2015

How I made an Outdoor Covered Wood Pergola

This blog is about how I made a beautiful custom Pergola in the place of what was originally an old shed:

I first started by researching different images of what a good pergola looks like. Then I had to remember how to frame a roof. I found this helpful website: (click here for link). At Lowes I learned about Ondura corrugated roofing material made out of tar, more pictures on that later.
In the afternoon I tore down the old shed. I used a recirculating saw to cut through the metal and then remove the old shed.
Hidden from view on the back part of the rooftop I found the inscription: May 13 1972. The little shed did good for being 43 years old!

Now all that remains is a scrap heap of metal for recycle.

The vacant slab of concrete exposed a very dirty wall.

After giving it a good power wash I used Drylok exterior masonry waterproofing paint to give the wall a new look.

I also used cement patch up mix to repair some of the lower part of the wall.

I used a 3/8" cement drill bit to drill and anchor 1/2" lag screws about 6" from each corner.

With the four brackets in place I screwed in the 4 x 4 post and then attached an 8 foot long 2 X 6. Using the level I realized there was a one inch slant to the concrete slab below. But that was okay because I actually cut the post a couple inches longer than eight feet just in case.


I used the 2 X 6's for the sides as braces to hold the post steady until I was ready to permanently nail them up.

In order to make sure I cut my rafters correctly I used scrap pieces to make test cuts. Then I used them as patterns for the real rafters.

I temporarily screwed to the front and back fascia boards a piece of wood for the center beam to sit on until I could nail all the rafters in place. After I removed the temporary pieces the resulting look produced a nice center floating beam effect.

Even with all the practice cuts I couldn't get the "perfect" joints. Later I thought of a way to improve the look.
In the meantime, I cut some scrap 2 X 6's on a 45 degree angle to provide a back brace for the posts.
To give even more structural support I made screw pockets in 2 X 4's and attached them at 45 degree angles from the facia boards to the post beams.

I used my Kreg Jig K4 and Ryobi clutch drill to make the pockets. I think the pockets provide the strongest joint for this application.

Pictured below is a window where the grill will be. So I made the brace a little higher than the others to avoid head banging.

I installed across the top of the rafters 1 X 2's to support the roofIng and give me something to nail it too.

I also cut the end of the rafters at a 45 degree angle for a "pergola" style look.

Now it was starting to take shape, except I was having a hard time with the center beam sticking out and what to do with it.

 

Eventually I angled 2 X 4's to add design to the look of the entrance. Then I had to cut and attach more 1 X 2's on the roof.

I also cut the bottom of the center beam on a 45 degree angle to match the rafters.

Here is a view from below.

In order to cover the sloppy joints mentioned earlier and give even more strength to the structure, I used lag screws to make a decorative joint on the front.
I used more lag screws around the facia boards and fastened them to the 4 X 4 beams for added strength.

I used Behr premium wood finish, cedar natural tone to paint the wood.

The corugated roof sheets were 4 feet by 6 so I had to cut about a foot off of them. In order to cut them you use a regular circular saw but have to flip the blade around. It reminds me of the same method used for cutting plastic siding.
The special nail heads have washers to keep the roof waterproof.

An old lantern added a nice decorative touch to the front of the pergola.

Another view from underneath.
We quickly set up a table...
...and fired up the grill.

Pergolas add an excellent touch to any yard!

 

1 comment:

  1. Nice write up Eric. Hand cut rafters are a real skill. Nice work.

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