Monday, May 4, 2009

More roofing

This week the roof progressed a lot further. As this type of roof construction has created a fair bit of interest I thought I'd show a few more photos and explain a bit further.

This photo is the front right hand side of the house. The scaffolding is required here due to the steep, (40 degree) pitch of the roof. Our roofing contractor is Canadian and he finds our regulatory safety measures to be quite amusing and a bit excessive compared to what he is used to.

The rear section of, (lower pitched) roof is now complete

As this type of roof is so well sealed, the ridge is ventilated as shown above to allow air to escape.

This photo shows the method of roofing construction quite well. The plyboard is nailed to the rafters and a metal 'drip edge' is fixed to the bottom edge of the plyboard where it meets the gutter. The 'drip edges' prevents water from seeping back into the timber roofing materials and directs it into the gutter.
The Underlay is stapled to the plyboard then the roof shingles are nailed over the top. The nails are covered by subsequent layers of shingles.
The little shiny blobs you can see on the shingles in the middle of the photo are a bituminous adhesive which is a part of the shingle. After installation when the roof heats up these blobs self-adhere to the shingle above to provide a stronger bond and a very high wind rating, (up to 190km/hr).

The valley section of the roofing is lined with a thick rubberised material. The underlay and the shingles overlap this material to provide a waterproof valley.

The rear section of the steep roof is almost complete.
I am very happy with the colour shade of the shingles, they are close to the local slate shade.
It was a bit of an educated guess when choosing the colour for this roof. This type of roofing can vary in it's perceived colour in different light. The manufacturer recommends that you look at an existing roof at different times of the day to get a true sense of colour rather than rely on photos but this is very hard to do if you don't live in North America and no-one around you has a similar roof.
Anyway, I think we chose well and the colour will tie in well with the brickwork.
Brickie should be on the job this week.


  1. I'm very impressed with the shingle roofing system, Greg. It leaves the old cement or terracotta tiles for dead!
    How does the cost compare?

  2. Gee quite a process...But it looks great and sure adds some new charm to the whole colorbond roof that took a huge fashionable interest for so long.
    Leaps and bounds ,Leaps and bounds

  3. Hi Greg,
    Just found your blog. Oh to have your design skills... your house design is wonderful. The shingles are to die for. I have almost finished building a house I designed with NO background in house design (I am a biochemist by training)... so many headaches along the way. I am hoping to learn from your blog so that NEXT time I build it will be easier! A-M

  4. Utilizing the slate shingle to create a waterproof valley is a smart idea. Just make sure that you use a good flashing for the job. Apron flashing would be quite appropriate for the task. That way, you can avoid water overflow and leaks.

    @Mariam Freame