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原帖由 西皮二黄 于 2010-10-11 13:36 发表 
为啥，先做水泥反而会省钱啊？就是因为要处理草吗？
Hunter兄的解释没看很懂...
大家看HOMEONE上有些人讨论得，好像大家觉得DECK做在CONCRETE上比直接这么做在SOIL上要好，而且还经济
My builder included the concrete slab to our alfresco, and their reasonings behind it was exactly as ring09 suggested. The alfresco cost a whopping $10K, but it was great to have just the concrete out there to use before we decked the area. (except the concrete dust coming in the house from feet was a real pain!)
One thing we did find difficult, was making sure all the joists for the decking were level, as the slab was not in places, so the joists bounced around a bit. If there wasn't a slab there to start off with, it may have been easier to just dig the posts into the ground and level them that way...but you live and learn! Being a complete DIY job, there may have been an easier way to level them out instead of packing and dyna bolts...but we didn't know! We could have used leveling compound, but that's expensive too.
Also, having a concrete slab underneath, the water can sit ontop of it underneath the deck for longer than what would be absorbed by the ground. Also our deck is pretty much completely enclosed underneath because of the slab and water doesn't 'freely' drain away. It's only been down for a couple of months, and hasn't had much use now it's winter. The water used to pool near the back door as the slab wasn't level...but I can't tell you if it does now..must check next time it rains and I'm home!
The deck cost us just over $2K and 6 weekends...not sure how much a deck of the same size (7 x 4m) would cost without the concrete and on posts.
Long term, I cannot say what is better...I'll let you know in 5 years time how it's holding up! It was a pain to get it level and not 'bouncing' for complete DIYers!
[ 本帖最后由 hunterxiao911 于 2010-10-11 13:53 编辑 ] |
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