Sealants around windows weaken with age, and it’s common for leaks to develop. These let HVAC-treated air out and may cause a noticeable increase in your utility bills, so it’s important to address them right away. You may be wondering if it’s best to reseal or replace leaky windows. Each solution has several factors to consider before going to the home improvement supply store.

Reseal

Start by looking for small gaps around the window panes and frame. The sealant may be crumbling, or the weather-stripping may have been sheared. 

These gaps let moisture in that could rot the wood frame and surrounding drywall. Scrape the old caulk away with a putty knife and smooth the area with sandpaper. 

When the surfaces are ready, apply the caulk in a neat line with a caulk gun. The caulk should be dry to the touch within an hour, but it can take up to 10 days to completely cure, depending on the brand.

Replace

You’ll need to replace wooden windows if water damage has already happened. Rotting usually appears dark, soft, and wet. Look at the window’s frame and the muntins between the glass panes. Do the same from the outside, and see if condensation forms between the panes on hot days. This is a sign that there are small leaks around the muntins and frame.

Carefully inspect the sill, surrounding wall, and siding material. Discoloration, brown streaks, and rings indicate a leak. If you wait to replace the window, you may end up needing more building materials as well because of growing damage. 

Mold growth is also a concern. Colonies form in damp conditions around frames, and spores can cause respiratory issues and flu-like symptoms. New windows are tricky to install without experience, and the job must be done right to prevent leaks, so consider working with a contractor.

If you’re ready to purchase materials for your next project, explore the selection at Huber Lumber. Based in Cincinnati, OH, this home improvement supply store carries products for both DIYers and construction professionals. Find doors, lumber, siding, and more on their website. Call (513) 731-4035 to speak with a sales associate and connect with the home improvement supply experts on Facebook for more construction tips.