The color of the steel roof is related to the lap form of the roof panel and the board

The color of the steel roof is related to the lap form of the roof panel and the board
There are three types of lap commonly used in the roof:
The first use of the overlapping form is more common, the site construction is relatively simple and convenient. This type of lap is generally in the lap laying 1 to 2 sealant, and then use the self-tapping screw to fasten. After the completion of the construction, the short term will not have any problems. After several years of wind and sun and rain and snow erosion, the sealant is easy to aging, in the sealant aging site is very easy to cause leakage. In addition, if the construction quality control is not strict enough, self-tapping screw is not perpendicular to the roof drilling, even if the self-tapping screw rubber cap, the rain will leak from the nail hole. Therefore, the construction we should take appropriate measures to strictly control the construction quality is very necessary.
The use of the second form of overlap is also common. This type of lap is relatively close to the first lap, but on the basis of the first form, a buckle is added to the lap in the roof. Although only added a buckle cover, this buckle cover played a considerable positive waterproof role. This buckle not only delayed the aging of the sealant, but also because it is in the self-tapping nail fixed roof and roof purlin after the connection to go, so this buckle cover can show the entire color steel roof surface nail good effect. And this buckle cover to further effectively prevent the rain from the nail hole at the leakage, even if the nail construction quality control lax, do not have to worry about the infiltration of rain.
The use of the third type of overlap is also more, but the use is not particularly popular. This is the biggest feature of the lap is 360 ° lock side, but the construction of a greater degree of difficulty.
This form of overlap is now the ideal form of overlap, although the use is not very common, but it is gradually to promote the form of lap. This type of lap in the field will be installed in the overlap at the laying of not less than 2 of the sealant and sealant, plus 360 ° lock, to strengthen the strength of the lap, so that the rain from the long side The possibility of penetration is greatly reduced