Malcolm Schweizer
01-14-2020, 4:00 PM
As you have seen, Im replacing the tin on my roof, and also upgrading it to bomb-proof status. The roof is timber framed with this unusual ring beam in the middle making a square- one beam on each hip a bit more than 1/2 way up the rafters. That is tied in to the timber framed joists below with upright posts. The rafters are dovetailed into foot-thick stone walls. The roof is skinned in 1 old-growth pine.
New codes require all roofs to be skinned in 1/2 or better ply, regardless of how well the original wood is. I got a deal on some surplus 3/4 treated ply for $17.50 a sheet. Thats not a misprint! Seventeen dollars and fifty cents for 3/4 4x8 treated ply! (Score!) That was laid on top of the original 1 pine and screwed with 3 stainless screws. On top of that are 2x4 purlins with 2x6 on eaves and ridges, screwed through everything into the beam rafters with 6 screws with wide heads. Ice and rain coating and flashing all wraps around the edges and the fascia boards nail over it to prevent wind from getting under and lifting the roof. Fascia boards are Cumaru, set in with stainless tapcons. Between purlins is a solid core foam and glass fiber insulation. Heavy gauge galvanized corrugated roofing on top of all that.
So, I kind of like to overengineer stuff. For anyone worried about weight, I had an engineer look at my rafters and he literally blurted an expletive and said, You could park a train on this roof. He said he had never seen a roof built this sturdy. Walls have more than ample support as well.
I upgraded the porch rafters to 3x6 (8 span) and tightened up the spacing. Rafters tie into poured concrete beams with galvanized 1/8 thick L brackets. Also there is a ledger of treated 3x4 bolted into the concrete with stainless 3/4 all-thread set in epoxy. The rafters are notched into that and screwed with 5 lag bolts in addition to hurricane clips. L brackets are behind that notch so that it is not just tied in at the notch, but also at the full 6 portion. The leeward end of the rafters have similar, tied into a ledger bolted into stone walls and also with L brackets.
My only concern in the next hurricane is should I buy red wine or white?
:-D
My title is a bit tongue-in-cheek. I think there are maybe a couple of concrete bunkers designed to withstand an atomic blast that would maybe at least be AS STRONG as my roof, but certainly not stronger. Should Armageddon come, any of you who survive are all invited over to my place for the after-party.
By the way, also just kidding about the red or white wine. I will always respect the power of hurricanes and my concern would be for the many people affected by it. Im sure you knew that.
New codes require all roofs to be skinned in 1/2 or better ply, regardless of how well the original wood is. I got a deal on some surplus 3/4 treated ply for $17.50 a sheet. Thats not a misprint! Seventeen dollars and fifty cents for 3/4 4x8 treated ply! (Score!) That was laid on top of the original 1 pine and screwed with 3 stainless screws. On top of that are 2x4 purlins with 2x6 on eaves and ridges, screwed through everything into the beam rafters with 6 screws with wide heads. Ice and rain coating and flashing all wraps around the edges and the fascia boards nail over it to prevent wind from getting under and lifting the roof. Fascia boards are Cumaru, set in with stainless tapcons. Between purlins is a solid core foam and glass fiber insulation. Heavy gauge galvanized corrugated roofing on top of all that.
So, I kind of like to overengineer stuff. For anyone worried about weight, I had an engineer look at my rafters and he literally blurted an expletive and said, You could park a train on this roof. He said he had never seen a roof built this sturdy. Walls have more than ample support as well.
I upgraded the porch rafters to 3x6 (8 span) and tightened up the spacing. Rafters tie into poured concrete beams with galvanized 1/8 thick L brackets. Also there is a ledger of treated 3x4 bolted into the concrete with stainless 3/4 all-thread set in epoxy. The rafters are notched into that and screwed with 5 lag bolts in addition to hurricane clips. L brackets are behind that notch so that it is not just tied in at the notch, but also at the full 6 portion. The leeward end of the rafters have similar, tied into a ledger bolted into stone walls and also with L brackets.
My only concern in the next hurricane is should I buy red wine or white?
:-D
My title is a bit tongue-in-cheek. I think there are maybe a couple of concrete bunkers designed to withstand an atomic blast that would maybe at least be AS STRONG as my roof, but certainly not stronger. Should Armageddon come, any of you who survive are all invited over to my place for the after-party.
By the way, also just kidding about the red or white wine. I will always respect the power of hurricanes and my concern would be for the many people affected by it. Im sure you knew that.