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Overview
Annual precipitation in Dover averages 40.4 inches with temperatures near 50.1 F, so the area experiences a mix of wet spells and dry breaks.
Statewide weather patterns in New Hampshire compound local risks, since humidity swings and storm seasons can push indoor moisture above safe levels.
Dover has cold winters and warm, humid summers, so moisture risk shifts between snowmelt and summer humidity.
Dover Inspection Services provides inspections and code enforcement for city codes.
This guide highlights local moisture drivers, seasonal risk, and prevention steps. For legal rights and landlord obligations, review the New Hampshire mold laws guide.
Sources: [New Hampshire | Britannica] | [Dover Inspection Services] | [NOAA Climate Normals - MANCHESTER AP, NH US]
Action Checklist
Dover Home Inspection Checklist
Common construction types in Dover affect where moisture problems develop. Here is how local building patterns shape what to inspect.
In Dover, inspection Services handles inspections and code enforcement for property conditions.
Documented moisture issues support inspection follow up.
Sources: [Dover Inspection Services]
- Dover gets roughly 40.4 inches of precipitation per year. Schedule gutter, roof, and drainage inspections seasonally.
- Roof flashing, gutters, and downspout connections.
- Attic insulation and ventilation near eaves.
- Basement walls, sump pits, and floor drains.
- Window sills with winter condensation.
- Bathroom fans venting outdoors.
- Water heater pans and HVAC condensate lines.
- Laundry hoses and shutoff valves.
Sources: [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - MANCHESTER AP, NH US]
Warning Signs of Mold in Dover
Watch for these signs that moisture is lingering in Dover homes and rentals:
- At an annual average of 50.1 F, Dover homes that show condensation on windows during warm months likely have an indoor moisture problem.
- Condensation that returns on windows each morning.
- Musty odors in basements or closets.
- Peeling paint near baseboards.
- Dark spotting near ceiling corners.
- Soft drywall around tubs or showers.
Sources: [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - MANCHESTER AP, NH US]
Mold Risk Factors in Dover
These are the most common moisture drivers for homes and rentals in Dover:
- Annual precipitation near 40.4 inches means Dover storm events and small leaks both matter.
- Snowmelt and ice dams can leak into attic edges.
- Freeze thaw cycles stress roof flashing and exterior joints.
- Humid summers slow drying after leaks.
- Condensation builds on windows during cold snaps.
- Basements can stay damp after heavy rain.
Sources: [New Hampshire | Britannica] | [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - MANCHESTER AP, NH US]
Dover Seasonal Risk Calendar
Winter
Heating systems work most of the year at 50.1 F average. Ventilate consistently to prevent moisture buildup on cold surfaces.
Spring
Thaw and rain keep basements damp. Check sump pumps.
Summer
Cool summers still bring rain. Inspect roof edges after storms.
Fall
Storms return. Recheck roof edges and window seals.
Sources: [New Hampshire | Britannica] | [NOAA Climate Normals - MANCHESTER AP, NH US]
Dover Moisture Playbook
Use this short playbook to stay ahead of common moisture problems in Dover.
After a Leak
Stop the source, remove wet materials within 24 to 48 hours, and dry the area with fans and dehumidification.
Monthly Maintenance
Check under sinks, clear condensate lines, and monitor basement humidity.
Seasonal Tune Up
Before storm season, clear gutters and inspect flashing; about 40.4 inches of annual precipitation means small leaks can add up.
Sources: [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - MANCHESTER AP, NH US]
Mold Prevention in Dover
Use these priorities to keep indoor humidity low and avoid recurring growth:
- At 40.4 inches of annual rainfall, maintaining clear gutters and extending downspouts well away from foundations is essential.
- Maintain indoor humidity between 30 and 50 percent.
- Dry wet materials within 24 to 48 hours.
- Vent bathrooms and kitchens outdoors.
- Clear gutters and direct downspouts away from foundations.
- Inspect roof flashing and window seals before storm seasons.
- Service HVAC condensate drains annually.
Sources: [EPA Mold, Moisture, and Your Home] | [NOAA Climate Normals - MANCHESTER AP, NH US]
State Laws and Rights
New Hampshire mold law snapshot
New Hampshire has mold-specific rules in addition to general habitability standards.
New Hampshire recognizes an implied warranty of habitability for all residential rentals. This warranty means that landlords must provide and maintain safe and habitable rental property, whether or not the lease agreement specifically says so and even if the lease tries to waive the obligation. To constitute a breach, the defect must be of a nature and kind which renders the premises unsafe or unsanitary, and thus unfit for living therein. RSA 48-A:14 establishes specific minimum standards including requirements for pest-free conditions, functional plumbing, electrical safety, structural integrity, adequate water supply, and heating facilities capable of maintaining at least 65 degrees Fahrenheit in habitable rooms.
Use the full New Hampshire guide for tenant rights, landlord responsibilities, and remedies.