The short answer
Inspect First
Before sealing anything, look over your attic for gaps, holes, or worn areas. Check the roofline, soffits, eaves, and any spots where pipes, wires, or vents pass through. Use a flashlight and look during daylight so you can see light coming through cracks.
Also check for signs of pests like droppings, nesting material, or chew marks. If you spot water stains or damp wood, that moisture can attract pests and weaken the structure. Address any water issues before sealing, or you may trap moisture behind your repairs.
- Check roofline and soffits for gaps
- Look at vent openings and flashing
- Inspect pipe and wire penetrations
- Search for droppings or chew marks
- Note any damp insulation or wood
Close the Gaps
Use materials that pests cannot chew through. For larger openings, like around vents or pipes, install metal mesh or hardware cloth with a fine grid. For smaller cracks, use a quality exterior caulk or expanding foam made for pest blocking.
Pay attention to areas where the roof meets the walls and around chimney flashings. Seal gaps at the roofline and along the eaves. Remember that pests can squeeze through surprisingly small spaces, so be thorough and check your work.
- Use metal mesh for openings larger than a quarter inch
- Apply caulk to cracks around pipes and wires
- Fill gaps at the roofline with foam
- Seal around any vent caps or louvers
Secure the Vents
Attic vents, including gable vents and roof vents, are common entry points. Make sure any vent screens are intact and fit tightly. If a screen is torn or missing, replace it with a new one that has small openings.
For crawl space vents, the same principle applies. If you have a crawlspace vent that leads into the attic area, seal it or cover it with mesh. Check that any louvered vents close properly and have no gaps around the edges.
Watch for Water Damage
Water damage can create soft wood and openings that pests exploit. If you notice stains on rafters or insulation that feels damp, find the source of the water. A leaky roof or a plumbing vent pipe can allow moisture in.
If the damage is extensive, you may need professional help. Water damage pros can dry out the area and repair the structure so your sealing work lasts. Ignoring moisture invites both pests and rot, so handle it early.
Know When to Call Pros
Some sealing jobs are simple, but others require a closer look. If you cannot find the entry point, or if the attic has significant water damage, you might need a professional inspection. Water damage pros can identify hidden leaks and suggest repairs.
If you live in Layton, keep a list of local pros who handle attic and crawlspace issues. They can help seal vents and repair water damage so your attic stays dry and without pests. Always check with your insurance company about coverage before starting major work. Policies vary, and your insurer decides what is covered.
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Call Now (801) 383-0232Frequently asked questions
What is the right material to seal attic gaps?
For larger gaps, use metal mesh or hardware cloth with openings smaller than a quarter inch. For cracks and small holes, use exterior caulk or expanding foam. Avoid materials pests can chew, like plastic or wood.
Can I seal my attic myself?
Yes, many homeowners can handle simple sealing with mesh and caulk. But if you have water damage or complex roof issues, you may need professional help. The pros can fix the underlying moisture that attracts pests.
Will sealing my attic keep out all pests?
Sealing helps, but it is not a complete barrier. Pests can enter through other areas like doors or windows. Also, if you have a pest infestation, you may need an exterminator. Sealing is a preventive step, not a cure.