During construction, a house can be left in the sun and rain without a roof or any weather protection. The constructors don’t seem to be much bothered by it, but does this cause any defects in the final product?
To answer this question, we have picked out the four most recommended answers from the internet and presented them below.
All building materials arrive on site with a specific moisture content. They can get wet until the building is ‘dried in’. Once the building is dried in, you have to wait for the moisture content in the framing to return to the proper level before sealing everything up with drywall and insulation from the inside. Framing getting wet isn’t a problem, it only becomes a problem if you seal that moisture in before it has had a chance to return to proper levels.
Construction materials are typically rated to a certain amount of exposure to the elements to allow for construction time. Thats why construction scheduling is so important, so that sensitive things arent ruined before the building is up. Ive seen thousands of dollars worth of material discarded because it sat too long in a building that wasnt sealed.Wood framing can go quite awhile exposed before there starts to be a real concern. But it depends on climate and whatnot.
I’m a PM for a general contractor. We started a 300 million dollar development in Vegas before the recession, which ultimately shut the project down right after foundations were done and steel was mostly delivered (huge laydown area). We ended up burying all the steel where it stayed for years until the economy rebounded and we started up again. Dug them up and they were good to go.
A framed house is fine for a while in the rain for a few reasons.
- That plastic wrap stuff, usually Tyvek, is hydrophobic.
- We try to get shingles on quickly to minimize how wet it gets, especially the horizontal surfaces because puddles can form and that’s the real issue. Puddles are an issue because they are constant. That wood is soaking indefinitely that’s when it starts degrading the wood, mold, etc. Wood getting wet and drying isn’t a huge deal aside from the threat of warping.
- Wood only warps when wet if you make it. If it’s laying perfectly flat, it will dry flat. To a certain extent, the framing of the house is fixed in place, there isn’t any major warping that can really happen. Plus, it shouldn’t be sitting exposed for too long in the first place.
Any wood in direct contact with cement must be treated since concrete always has some level of humidity. All the other wood sheds water rather well. Also all the 2×4 or 2×6 and such are in a place that is exposed to air and can dry quickly. The only thing that is a problem is OSB plywood. On a vertical wall it still sheds pretty well but when we do a roof the goal is to cover it the same day because it can’t shed as well and it will definitely swell and make it impossible to fit the spacer clips on. Also the last thing you want compromised in any way is the roof that will see plenty of abuse over the years.