Hello everyone,
Our terrace (about 38 m² (409 sq ft)) will be located above our garage driveway, basically on the first floor.
We have a steep slope, so the basement is planned with a double garage and the terrace above it. It will be accessible from the living areas.
Now to the main concern. The main substructure from the timber construction company for the terrace/carport will be wooden beams. On top of that will be Northern Pine with resistance class 1. The "smaller" substructure will, of course, be made from the same material: 45x70 mm (1.8x2.8 inches) squared timber. Then the decking boards will go on top.
So there are 3 layers of wood stacked. The decking boards plus the smaller substructure will be mounted in the classic way using Terrafix spacers and should not need to be replaced for hopefully 15+ years.
QUESTION: How can I properly and weatherproof attach the squared timber substructure to the beams? A friend of mine had severe rot develop deep into the beams at the screw points. I don’t want to have to completely replace the beams in 20 years, but rather hopefully only one maintenance cycle later!
What solution would you suggest? The timber center also offered me rubber granulate pads. Should I use those? Are they sufficient?
Thanks a lot for your advice!
Konstantin
Our terrace (about 38 m² (409 sq ft)) will be located above our garage driveway, basically on the first floor.
We have a steep slope, so the basement is planned with a double garage and the terrace above it. It will be accessible from the living areas.
Now to the main concern. The main substructure from the timber construction company for the terrace/carport will be wooden beams. On top of that will be Northern Pine with resistance class 1. The "smaller" substructure will, of course, be made from the same material: 45x70 mm (1.8x2.8 inches) squared timber. Then the decking boards will go on top.
So there are 3 layers of wood stacked. The decking boards plus the smaller substructure will be mounted in the classic way using Terrafix spacers and should not need to be replaced for hopefully 15+ years.
QUESTION: How can I properly and weatherproof attach the squared timber substructure to the beams? A friend of mine had severe rot develop deep into the beams at the screw points. I don’t want to have to completely replace the beams in 20 years, but rather hopefully only one maintenance cycle later!
What solution would you suggest? The timber center also offered me rubber granulate pads. Should I use those? Are they sufficient?
Thanks a lot for your advice!
Konstantin
M
matrixx8825 Jan 2019 19:24Yes, see the view
M
matrixx8825 Jan 2019 19:43Nordlys schrieb:
Ok. Understood. That’s unfortunate for the tar paper. Sadly, you’ll have to protect it with something like a membrane. But it is a fairly protected location. Ok, thanks, I will take a look!
But you would still screw the subframe onto the joists through the membrane, right, or install it floating?
M
matrixx8826 Jan 2019 08:52Nordlys schrieb:
This is done with the joist because where wood meets wood on a surface, moisture tends to remain and causes it to rot quickly. So, a piece of roofing felt is placed in between. Works like a charm.I also found this, what do you think of something like that?
It would be enough to coat the top side of the beams, then add roofing felt and the pads for the height adjustment in between. Screw the battens onto the beams, and then fix the decking boards onto the battens.
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