Building signs serve as permanent exterior facilities of commercial and office architecture, so durability determines long term operation costs. Many purchasers only focus on surface appearance while ignoring hidden structural and material details, leading to fading, deformation and water leakage within two to three years after installation. This article sorts out essential inspection details before confirming building sign orders to guarantee long service cycle of finished products.
Material performance directly decides anti fading and anti aging capacity of building signs under long term outdoor exposure. Buyers need to confirm surface coating adopts outdoor PU weather resistant paint instead of ordinary indoor spray paint. Indoor paint will crack and fade rapidly under ultraviolet radiation and rain erosion within two years. Metal frame parts of building signs must select 304 stainless steel or high hardness aluminum alloy, rejecting thin iron plates prone to rust and perforation. Transparent surface panels choose UV resistant acrylic sheet instead of cheap ordinary plastic, which turns yellow and brittle after one year of sunlight exposure. Backlight light covers use high strength PC material to resist impact and temperature difference deformation. Checking complete material parameter list before signing orders avoids low cost inferior materials that shorten building sign service life severely. Matching standard weather resistant materials extend building sign service life to over ten years with stable display effect.
Water leakage inside building signs causes LED light short circuit and circuit board damage, generating high maintenance replacement costs. Qualified building signs adopt full sealed frame structure with waterproof rubber strips embedded on all splicing gaps. All wiring openings reserve waterproof wire sleeves to prevent rainwater seepage along cable gaps. Internal light source installation areas reserve drainage holes at bottom corners to discharge accumulated rainwater entering the sign shell accidentally. Power transformers are fixed on separated waterproof mounting brackets instead of direct contact with inner metal shell to avoid moisture corrosion. Purchasers ask suppliers to provide internal structure production photos during manufacturing progress to verify complete waterproof treatment procedures. Neglecting waterproof structure inspection leads to frequent light failure in rainy seasons, requiring repeated disassembly and repair work for wall mounted and high rise building signs.
Tall wall mounted and suspended building signs bear strong wind impact in open outdoor environments, and insufficient structural reinforcement will cause deformation or even falling risks. Large area building sign back frames add thickened steel keel support grids to disperse wind pressure evenly across the whole sign panel. High rise external wall building signs adopt expansion bolt fixing frames with embedded steel plates inside wall bodies to enhance connection stability. Vertical large building signs set diagonal pull support rods between sign body and wall surface to resist lateral wind force. All welding joints of building sign metal frames conduct full welding and anti rust polishing treatment to avoid welding crack fracture under long term wind vibration. Buyers confirm wind resistance parameter test reports matching local annual maximum wind speed before mass production. Strict structural reinforcement inspection eliminates safety hazards and reduces later maintenance risks of large building signs installed on high rise facades.
