Hi I installed a 16 by 8 a single spring door and wound the spring and it opened very easy but it will not close it is to hard to pull back down. My question is the spring to tight or to loose? How can I get it to close? Thanks in advance.

Hello Everyone, Our garage concrete floor was painted over prior to when we moved in 8 years ago. Our house is in Claremont, CA (which is basically at the foothill of some mountains nearby) and the house was built in the 60's. We have pretty mild winters--lowest in the 30's but get dry and hot up to 110 in the summer. I have no idea when this concrete was initially placed but looking at the pictures it seems that the floor was covered at one point with either tile or vinyl or something since you can square marks. I'm guessing it was removed and then painted over prior to when we moved in. Pretty soon after we moved in, we noticed paint chipping. After that we noticed the concrete floor was chipping. Parts of it where it has chipped and crumbled you can basically scratch it yourself and get a dusty powder. We used to park 2 cars in there but now we only park 1 and the damage is definitely more pronounced under where this car sits. Our first thought was to epoxy it professionally, however a couple of estimators have said that there is definitely moisture from somewhere and this is causing the damage. We have never seen water itself puddling in the garage or moisture beads. Also, there is no distinct area where the damage is significantly worse. It's sort of all over and worse where the car sits. So I don't think its a leak in any spot per se, perhaps it's moisture from underlying bedrock since we are close to a mountainous area. We haven't had water issues anywhere else in the house and the concrete of the driveway and surrounding areas are fine. A friend of ours did a quick mini moisture test by taping down a large piece of plastic and then checking it 4 days later. The plastic was dry. No moisture sweat at all. Instead when they lifted up the tape, the paint came right off. Anyway, both epoxy companies said they wouldn't be able to guarantee their epoxy work because of it and actually wouldn't epoxy it at all. They either recommended carpet in the garage (yuck!) or covering it with something like gym mats or similar (however we worry about moisture accumulating underneath and mildew etc). They said an alternative is to rip out this concrete and just put new concrete, however likely they will not be able to seal off moisture and the concrete will likely return to its current state (how long would that take?). And then after doing that, epoxy it. One person was willing to do this. He said he would grind it down, do moisture tests and put concrete then an admixture called EFFLOCK TT (anyone heard of this?) on top, then flaked epoxy. He guarantees it basically for 1 year. Since the mini moisture test we did was dry, one person said that another possibility is that the concrete was either mixed in incorrect proportion (too much sand not enough rock etc) or not properly sealed and not properly painted. My guess is that its a mixture of everything---bedrock moisture, concrete quality, poor paint job. So we are trying to make a decision that's best for us. We have young kids and they like to play and do crafts in the garage. We want something that will be cost effective and last. Any advice and recommendations you all might have would be greatly appreciated! Thanks!