Even if you’ve used Drylock you will need to check for efflorescence; this is. Blue Max Liquid Rubber Waterproofer is a water-based, strong and highly. If you are looking for a perfect concrete driveway or basement floor sealer, the Foundation Armor sealer AR350 stands out from the rest. However, if the water doesn’t bead but spreads out and is absorbed, and the concrete darkens, then it isn’t sealed. This can be a major health issue, especially if anyone in your home has allergies or asthma. When waterproofing basement walls with it, brush or roll the paint on thickly enough to fill all the little surface holes, then allow it to dry fully before applying a second coat. Campbell St. The coating is crack resistant and won’t peel. The second coat will fill all the porous gaps and prevent water seepage or moisture intrusion. Our champion concrete sealer for basements. After over 30 hours of researching more than 60 concrete sealers and testing and evaluating seven of them, our results for the Best Concrete Sealers for 2023 are found below. It helps a lot in reducing smells from basement walls. Coverage will vary with thickness of application but will approximate 30 lineal feet per cartridge (1/4” thick. Duck Coat provides an impervious barrier to water and moisture that seeps in from the exterior of walls. Look for tiny holes in the tubing, gaps and branching lines of dust and dirt at duct connections. FlexiSpan® crack repair is actually a three-part process that begins with the application of a flexible sealant along the full length of the crack. You can apply the fix by yourself. Next, a strip of flexible and porous foam is installed. Black Jack® Rubr-Coat #57 is a premium rubberized coating for waterproofing roofs and foundations. Brush paint into the corners of the room, as you did with the sealer. Cons. White Liquid Rubber. Save up to $100 on your qualifying purchase. Step 3 – Seal the concrete walls and floor against moisture and water vapor with RadonSeal Concrete Sealer. Mastic Duct Sealant vs. Model # BE185169 Store SKU # 1000162969. In this video I show you how to waterproof your basement walls with "Flex Seal Liquid" and "Flex Shot". Coverage rate: First coat – 40 square feet per gallon. 20–30 minutes should do it. Find My Store. One good reason for waterproofing a basement from the outside is that outside is where the water is. Blue Max 5 Gal. 29. Always had "dampness". With this software, technicians can accurately measure duct leakages in commercial buildings and residential homes. Use above or below grade. Tar coating is a common sealer that’s used for basement damp proofing around the country. 2. There’s nothing like the. For my furnace room, I chose to stick with white and in order to do the recommended two coats, I stocked up on four gallons of. a Sears Marketplace seller. It is highly flexible and will not fail due to adhesion, cracking, or tearing. 50 per square foot for DIY waterproofing. Compare. Costs for interior basement sealing can range from $200 to $3,000. It can also help seal out air, water, and moisture and is chemical and mildew resistant - making it a great choice for your basement walls. Come join the discussion about. 14-fl oz White Aerosol Spray Waterproof Rubberized Coating. Seal the new paint finish with a water-resistant sealer, such as polyutheane, varnish, or concrete sealer. DRYLOK. ft. Spread evenly and do not allow puddles or a heavy surface film to occur. Stir thoroughly and do not thin. Use on glaze tile in the basement. Duck Coat Rubberized Coating for Rubber Roofs is specifically engineered for application over EPDM, TPO and PVC rolled rubber roofing materials. 1. Ames Block And Wall 1 Gal Liquid Rubber Waterproof Sealant Bwrf1 The. SENTINEL 24‑7 Zero Mold & Mildew Resistant Coating, White. Mastic Duct Sealant vs. Allow the coat to dry. PROTECTIVE FINISH FOR - Foundations, ICF's, Basements, Shower Liners, Deck and Fence Posts, Planter Boxes, Metal, Wood, Concrete, and more. 109. Gray Rubberized Basement Sealer; Gray Rubberized Basement Wall Patch; Black Rubberized Liquid Coating; RV Duck Coat. One gallon costs about $65 and covers 175 to 250 square feet for one coat, but you’ll need at least two coats. We would like to show you a description here but the site won’t allow us. This process needs to be repeated 2 to 3 times, with a gap of 20 minutes in between each application, for best results. Use Flex Seal the liquid rubber sealant coating on roof leaks, gutters, skylights, hoses, windowsills, PVC pipes, flashings, duct work, foundations, basements, chimneys, downspouts, Vent pipes, A/C drip pans, RV's and Campers, Trailers and so much more!A coating on the exterior of a foundation prevents water and water vapor from moving through the wall. Superior tensile strength forms a tough rubber membrane. RUBBERIZED SPRAY SEALANT A spray applied coating that provides a flexible seal against the elements. While the sealer is wet, it is possible to walk on the. Duck Coat provides an impervious barrier to water and moisture. Use plastic tarp and tape to cover areas that will not be painted. This water-based sealer will work to help prevent oil and water stains and can cover over 150-250 sq. Prep surfaces by removing stains with mild soap or Restore-N-Prep (sold. Apply one coat using thin even strokes. It says to put this on at a rate of 1/2 gallon per 100 square feet. Duck Coat Black Roof Coating. Strong odor. Reduce water ingression and moisture intrusion with the Siloxa-Tek 8500 concrete sealer. Dicor Self-Leveling Lap Sealant. Model Number: 1536011 Menards ® SKU: 1536011. Coverage will vary with thickness of application but will approximate 30 lineal feet per cartridge (1/4” thick. I recommend using sun glasses when applying Max Stretch white, since it really does reflect the Sun light. This is a 1-Gallon can of interior/exterior basement and masonry waterproofing paint, white, 1-Gallon in white. ft/G per coat. BEST FOR LEAKING PIPES: Flex Tape Rubberized. How many square feet will 2gallon of Duck paver sealer cover! by Dave | May 17, 2023. Best Penetrating Sealer: Ghostshield Siloxa-Tek Concrete Sealer. Added one full bathroom recently. More Options Available $ 198. These areas tend to trap moisture, making it a breeding ground for mold, mildew, and fungal growth. 00 11% Mail-In Rebate Good Through 4/23/23 $131. RadonSeal works deep inside concrete walls, floors, and heavyweight concrete blocks to help strengthen and waterproof the substrate permanently. We have full basement, mostly unfinished when we bought the house (well, still 80% unfinished… lots more work to do). Allow first coat to dry thoroughly before applying successive coats. It is formulated to seal, protect and beautify. Paintable. On may 7, 2021. The website is currently online. Basement waterproofing sealers are commonly used to seal pores and capillary tracts of concrete to prevent water from entering. • Superior UV Resistance and Weathering Characteristics. Our basement waterproofing solutions are 99% effective at preventing harmful Radon Gas from entering foundations. The process puts air inside the ductwork under pressure before causing polymer particles to stick on the edges of a leak. However, if the water doesn’t bead but spreads out and is absorbed, and the concrete darkens, then it isn’t sealed. Product Description. Arrows indicating the only point where leakage could occur. 0082092. Once the foundation is built, the bituminous compound is applied to the exterior walls, and a drainage pipe is set to deter water and moisture that’s threatening to get into your basement. Blue Max is easy to apply with brush, roller or sprayer. 1. Do not dilute. Duck Coat forms a thick, gray highly elastomeric rubber membrane. D-Seal® is a premium grade, smooth, water-based duct sealant formulated for indoor/outdoor use on high and low-velocity duct systems including metal, fiberglass duct board and flex duct. Duckcoat. • Lowers Roof Temperatures by Reflecting the Suns Rays. GrayShield™ UV resistance, water resistance, and natural gray color allows for use below grade, as well. RV Duck Coat 100% White Acrylic Elastomeric Roof Coating; RV Duck Patch White Acrylic Elastomeric Roof Patch; RV Duck Coat Ultra White Silicone Roof Coating; RV Duck Patch Silicone Patching Sealant; RV Duck Coat EPDM & TPO Rubber. Water Infiltration Basements Garagefloorcoating. Here are more than 1,100 visitors and the pages are. Duck Patch Basement Coat. BEST ECO. You Save $9. One gallon treats up to 100 square feet per coat, and easily applies with a roller, paint sprayer or brush. . DRYLOK Siloxane 7 Brick and Masonry Penetrating Sealer is a clear, durable, water-repellent, specialty formulation for use on exterior, above-grade, vertical and horizontal brick and masonry surfaces. Offers great protection. Flex Seal Liquid. (60) Questions & Answers (148) Hover Image to Zoom. It cleans and “activates” rubber roofs in preparation for coating with RV Duck Coat acrylic and silicone based elastomeric roof coatings. Duck Coat can be installed on most roofing substrates including built up roofing (BUR), metal, concrete, EPDM Rubber, TPO, APP, modified bitumen,. Liquid Rubber Foundation Sealant/Basement Coating is a water-based product that is safe to use both indoors and outdoors. Photo: depositphotos. Revised: 08/18. However, it has to be done correctly. It’s a pretty cost-effective waterproofing solution. Besides, the product has a hydrophobic nature that prevents vapor. A+ rated basement waterproofing company and basement. Once the wall has dried, wet it thoroughly with a garden hose and apply a second coat of the waterproofing mixture while the wall is still wet. /gallon. Wood: Use preservative-treated lumber and sheathing when installing wood products below-grade. per coat; Helps stop mold and mildew growth; Eco-friendly; Online price includes PaintCare fee in the following states: CA, CO, CT, DC, ME, MN, OR, RI, VT, WA; Return Policy;. Sealants to Block Offgassing from Wood shellac to block wood odors worked well A. PaverGeneral Masonry Sealer 5801 – 5 Gallon Bucket – Clear Waterproof Sealant for Stone, Brick, and Mortar – Protects Driveways, Basements, and More. This water-based sealer can also be mixed with latex paint to extend the. After testing each of these coating treatments, I tested the manufacturer’s “active leak” patch product by drilling 5/8" holes at the bottom of each water-filled column. BEHR Premium Wet-Look Sealer is a clear, non-yellowing, high solids, acrylic-based masonry sealer. 2206. First, you'll want to clean up the areas you'll be waterproofing. With over 25 years of experience, this local family-run company is ready to help with your basement repair and remodeling needs. 0082390. Duck Coat is a white, highly elastomeric, rubber roof coating that provides a waterproof sealant over flat roofs. This can be a problem on. Application. 520. Concrete sealers are water- or solvent-based substances that work to strengthen and/or protect your concrete from harmful water damage, the elements, oil stains, abrasion, UV rays, deicing salts, and more. 021 to . Rust-Oleum 15-Year Ultimate Asphalt Driveway Sealer, 1000 sq. Flat/Ponding Surfaces - 1 gallon/15 sq ft (1. Duck Patch Liquid Rubber Wall Patch is a highly elastomeric heavy-bodied polymer emulsion patch material featuring advanced rubber technology. Thoroughly rinse roof surface. FLEX SEAL LIQUID is thick rubberized liquid that you can brush, roll, dip or pour to form a durable, watertight flexible barrier. coat to cure for at least 4-6 hours or until dry to the touch. A paint roller or brush made specifically for masonry is best. Want to know where to buy Seal-Once® wood and concrete finishes? Click here to find a retailer near you. Apply material with either a soft brush, ¾” nap paint roller, or a high-pressure sprayer. Final Price $ 1,779 11each. You need to seal the inside walls by applying the perfect waterproofing product. In order to bring you up to speed on how you can fix your leaky ductwork in how best suits you, let’s go through a few of the most popular options on the market: 1. This product is highly rubberized to withstand the rubber roof contractions and expansions. Foundation Armor AR350 Acrylic 5 Gal Concrete Sealer. Duck Coat 5 gallon. Duck Coat Black Roof Coating. Advantages. Many of the waterproofing products listed below will only work if applied directly to the substrate, so any existing coatings on the surface, wall, or floor must be removed. Duck Coat DrySeal Premium Rubberized Foundation Coating is an elastomeric polymer modified asphalt emulsion designed for coating concrete. 30 (5 gal. Find My Store. 2520 S. Manufacturer: ThorW orks Industries, Inc. Black Knight Airport Grade 3-Year Asphalt Driveway Sealer, 250-500-sq. 76mm) membrane. 025). With just one coat, it minimizes the deterioration of masonry and mortar, and helps control efflorescence (salt deposits) and surface staining. Gray Rubberized Basement Sealer; Gray Rubberized Basement Wall Patch; Black Rubberized Liquid Coating; RV Duck Coat. Product went on smooth and applied two coats of each. He represents PermaSeal very well!! Noreen Shanahan. Plus 5 Gal. ft. Tuff Duck Granite Grout And Marble Sealer 1 Quart Stone Tile Best. Let the first coat dry for 24 hours before applying the next coat. The basement will not be finished in any way, so I'm looking for a relatively simple and cheap solution. DRYLOK. -scraped the paint from the glazed tile blocks -re-point the mortar joints -cover the seams with blue max then seam tape -apply blue max in several coats After drying, walls are ready for primer and paint. Duck Coat Liquid Rubber Basement Sealer is a highly elastic polymer emulsion sealer featuring advanced rubber technology. 33. 41 /gallon You Save $131. Sold By Ami Ventures Inc . A minimum of 2 coats is required for the fully transferable warranty to apply. Fax: 41 9-626-5477. A highly elastic polymer emulsion sealer featuring advanced rubber technology. 3lbs for 32ft² (Single Coat) - Waterproof Rubber Paint & Leak Repair Coating for Leaks, Cracks & Roof Repair - Multi-Surface Easy to Apply, Water-Based. Duck Coat DrySeal Premium Rubberized Foundation Coating - 55 gal. DRYLOK ® Protector Clear Low Sheen Penetrating Sealer appears milky in the can but dries clear. Buy On Amazon. Extremely porous surfaces may require a second coat. This “fix” can be an inefficient method to protect against moisture and could even lead to mold growth. Tuff Duck Granite Grout And Marble Sealer 1 Quart Stone Tile Best. It’s a product you can rely on to help stop water penetration and protect the surface against the damage it can cause. RV Duck Coat 100% White Acrylic Elastomeric Roof Coating; RV Duck Patch White Acrylic Elastomeric Roof Patch; RV Duck Coat Ultra White Silicone Roof Coating; RV Duck Patch Silicone Patching Sealant; RV Duck Coat EPDM & TPO Rubber. No need for prepping, works wet or dry. S. BEST SEMITRANSPARENT: SaverSystems #1 Deck Premium Semi-Transparent Stain. Fiberlock IAQ 6000 Mold Resistant Coating (5 GL) $386. Suitable for above and below grade use. High Gloss Clear Polyaspartic Two-part topcoat system. Duck Coat is a white, highly elastomeric, rubber roof coating that provides a waterproof sealant over flat roofs. It can be used on a variety of surfaces, such as brick, masonry walls, concrete, cinder blocks, or stucco. Gray Rubberized Basement Sealer; Gray Rubberized Basement Wall Patch;. The Foster® “Clean-Kill-Coat” approach for mold remediation defends against mold growth and re-growth on the coating surface long term. How To Use Flex Seal Liquid. Seal it off from an attached basement with polyethylene sheets fastened with duct tape. In fact, your paint may still look wonderful, while the top coat is suffering significant damage. Drip, place, or scatter 1/4 to 1/2 teaspoons of water in different locations around the concrete floor. (1-1. SANI-TRED® is a revolutionary liquid rubber coating system that will effectively, completely, and permanently coat, repair, and protect your concrete pool. An environmentally-friendly, highly effective EPDM and TPO Rubber roof pretreatment. Concrete waterproofing is a science. Apply one coat of PermaFlex (240 sq. “Measure twice, and cut once,” as the saying goes. The quick-acting sealer produces results within 24 hours. 668. It from 0 to 10 are automatically scored by our Tool Review tool based upon the data collected. We also loved how simple it was to use the spray out of the package. Depending on surface porosity, 1 gallon covers 75 to 125 square feet per gallon. Top Coat Required. The Spruce / Amelia Manley. It cleans and “activates” rubber roofs in preparation for coating with RV Duck Coat acrylic and silicone based elastomeric roof coatings. HIGHLY FLEXIBLE - Sealant final membrane has over 900% elongation in the sealing material, preventing adhesion failure causing cracks and taring. Apply using either a brush, roller, or airless spray unit (suggested tip size . Duck Coat Basement Sealer – Duck Coat. Duck Coat Rv 100 Acrylic White Elastomeric Roof Coating. Design1. 1. Phone: 80 0-326-1 994 . Kai. Blue Max 5 Gal. 2. Air sealing your ducts is cheap and easy. Performance Coatings. Recommended for sealing joints, seams, and duct wall penetrations on metal air duct. Has an amber tint. It tackles tough stains including heavy water damage, rust, smoke, nicotine, grease, tannin, ink, pencil, felt marker, pet stains and more. . NO LEAKS. If hiring a pro for the project, the average cost is approximately $6. ) The exterior of the foundation wall is. Ames Block And Wall 1 Gal Liquid Rubber Waterproof Sealant Bwrf1 TheThis video is sponsored by Flex Seal. Step 6: Apply Waterproof Coating to Basement Interior Walls. Product Name: Duck Coat Liquid Rubber Basement Sealer Recommended Use of the Chemical and Restrictions on Use Recommended Use: For Interior and Exterior Use Supplier’s Details Manufacturer Address ThorWorks Industries, Inc. **Fiberlock Lag-Kote II may be diluted with 10% water (stir well) to thin and stretch out the coating. Apply the sealant: Paint masonry surface with a thick coat of sealant. We would like to show you a description here but the site won’t allow us. It combines rubberized asphalt self-healing characteristics with the ease of application and cold-weather performance of acrylic adhesive-based products. Forms a White rubber membrane that protects rubber roofing. 2. Ideal for waterproofing above & below grade foundations, basements, roofs, floors & more. This “fix” can be an inefficient method to protect against moisture and could even lead to mold growth. Alumaguard All Weather. Put the phone down. Find My Store. EDPM rubber roofs, TPO rubber roofs, polyurethane foam, APP and SBS modified bitumen, metal, asphalt, concrete, wood and more. We would like to show you a description here but the site won’t allow us. Then I began applying the coating with a regular nylon-bristle brush. If you want professional help to assess and treat mineral bloom on your basement walls, call Dry Basement Solutions at 201-258-4540 for a consultation. Using a caulking gun, apply to a minimum wet thickness of 1/4”. 0 Crystal Clear Premium Gutter. How To Insulate A Crawl Space With Dirt Floor Hunker Basement Remodeling Mobile Homes Home. The Clear Penetrating Stone and Concrete Sealer is reasonably priced and takes 1–2 hours to dry. The membrane can also be used for horizontal applications for underslab waterproofing and vaporproofing. For interior walls, apply approximately 1 gallon of sealant per 50 square feet of space, using two to three heavy coats for maximum effectiveness. The removal of old concrete sealer can be done in one of two ways: mechanical or chemical. Basement Waterproofing Sealer Regular Grade. Most paint types aren’t durable enough to protect outdoor concrete surfaces and will get washed off if exposed to weather elements (rainfall). Seals out. per 100 sq. Helps stop mold and mildew growth. StoneTech Grout Sealer. RV Duck Patch White Acrylic Elastomeric Roof Patch. BEST PVA PRIMER: Kilz PVA 5 Gal. The result is superior adhesion and performance of roof coatings over rubber roofs. – Shimon Rura. After sealing your basement floor, move on to waterproofing the interior walls using Liquid Rubber's Color Waterproof Sealant. 127 reviews. BEST OIL-BASED: Kilz Odorless Primer/Sealer, Oil Based. I was told by the company that the DuckCoat would seal them up too. Can become the cause of mold growth in your basement. View on Amazon. RV Duck Coat 100% White Acrylic Elastomeric Roof Coating; RV Duck Patch White Acrylic Elastomeric Roof Patch; RV Duck Coat Ultra White Silicone Roof Coating; RV Duck Patch Silicone Patching Sealant; RV Duck Coat EPDM & TPO Rubber. Duck Coat Dry Seal. Flat/Ponding Surfaces - 1 gallon/15 sq ft (1. Product Description. Let it dry: Allow to dry overnight or for a minimum of 12 hours between coats. Below are general guidelines for applying sealer based on a typical application scenario. Apply at a rate of 70 square feet per gallon per coat. It will then chemically react with free lime and alkali (Portland Cement), continuously cure, hardening as a silicate mineral, expanding within the geometry of concrete, and sealing. Mastic and latex sealant is a water based, paste-like substance. Blue Max is easy to apply with brush, roller or sprayer. 5-gallon size, which is perfect for large projects. TR Score. Waterproofing a Basement on the Outside. The waterproofing spray comes in 22 ounces, 64 ounces, and 128 ounces. BEST FOR CRACKS: KILZ Over Armor Textured Wood. 75 gal. Duck Coat Liquid Rubber Basement Sealer 4 75 Gallon. Sump Pump Service. Basement Waterproofing Sealer Regular Grade: Price $ Using a caulking gun, apply to a minimum wet thickness of 1/4”. Daily Pageviews-Load Time-Site Overview . Puncture foil at innerbase of nozzle. Description DUCK COAT LIQUID RUBBER BASEMENT SEALER is a highly elastic polymer emulsion sealer featuring advanced rubber technology. Mar 9, 2021 - This Pin was discovered by Patrick Reiner. Grout sealers, which often also seal and protect the tile surrounding the grout, are a crucial aspect of grout care. In this video, Peter O'Shea will. Concrete materials 10standard cme repair kit for walls. Start off with a clean surface, so the sealant will adhere properly, or it will lead to chipping, cracking, or worse yet, water seeping down between the sealant and the. 0 Comment. This seal can be used in temperatures. One 4. Model # 11203-6. Wet out roof surface with Sprayable Roof Cleaner and scrub with a stiff bristle brush. Best Concrete Pond Sealer: Herco H-55 Pond Coating. Duck Coat provides an impervious barrier to water and moisture that seeps in from the exterior of walls. Use RV DUCK COAT SPRAYABLE ROOF CLEANER to clean roof prior to applying White Acrylic Elastomeric Roof Coating. Promac Rubber Duck Liquid Grey 20l Wb877 9 Chamberlain. Break form ties off on the inside of the foundation too. Sandusky, OH 44870 . When completely. SENTINEL Formula 538 Smoke & Odor Primer/Sealer Odor Encapsulant, Natural Wood (4 GL) $235. Ideal for waterproofing exterior concrete basement walls, poured concrete walls, polystyrene/styrofoam insulation board, wood, foam, and more. (217) $19. Best Sealer Overall: TotalBoat Concrete Coating. BEST FOR INTERIORS: Quikrete Fast-Setting Self-Leveling Floor Resurfacer. Advertisement. COST-EFFECTIVE & CONCENTRATED: One-gallon concentrate makes 5 gallons - an unbeatable value. When you’ve finished with the corners, use a lint-free roller to apply a coat of epoxy paint to your basement floor. SKU: 0841DI. It is also an excellent topcoat for paints and stains. DUCK PATCH LIQUID RUBBER WALL PATCH is a highly elastomeric heavy-bodied polymer emulsion patch material featuring advanced rubber technology. Isolate your work area with drop cloths on the floor and hanging plastic sheets covering the walls / other areas. Daily Visitors. 021 to . Forms a black rubber membrane that protects rubber roofing. . All you need to do is spray the sealer on the surface and wipe it off right away. Even use it as a grout sealer! Concrete Sealer dries down to a transparent, stain-resistant finish that won’t yellow or alter surface texture and appearance ; READY TO USE: Our ready-to-use Concrete Sealer absorbs into surfaces and protects up to 200 sq. Selemix 7-110 2 Pack Acrylic Topcoat. Apply 3-4 heavy coats to achieve a 40-60 mil. One Coat Coverage. A highly elastic polymer emulsion sealer featuring advanced rubber technology. Application. Best Budget Drylock Extreme Waterproofer. The 1-gallon size of this water-based sealer is enough to cover two coats on a 67. Ship To Store - Free! Duck Coat black is rubberized coating for rubber roofs. Foundations, ICF's, Basements, Shower Liners, Deck and Fence Posts, Planter Boxes, Metal, Wood, Concrete and more. Premium Decoration Customized High Cl Home Design Solutions. I recommend using sun glasses when applying Max Stretch white, since it really does reflect the Sun light. Deep Penetrating Concrete Sealer for Foundations and Basement Floors. com. 00 (983. Superior UV and weather resistance results in long term protection for rolled rubber roofing materials. It cleans and “activates” rubber roofs in preparation for coating with RV Duck Coat acrylic and silicone based elastomeric roof coatings. Creates an attractive variegated look similar to an acid stain. Top 5 Concrete Sealers. Green. $70. 4 sq m). Duck Coat provides an. Paint Dries to touch in one hour and can be re-coated in 4 hours. It’s not a permanent, reliable solution. Final Price $ 88 99each. VERTICAL SURFACES: Apply a minimum final thickness of 1 gallon per 30. Blue Max 5 Gal. What Is Liquid Rubber Waterproofing Rust Oleum Stops 30 Oz Leakseal Clear Flexible Rubber Coating Sealer 2 Pack 275116 The Home Depot Flex Seal Liquid. Air duct replacement costs $25 to $55 per linear foot or $270 to $500 per duct for a crawl space, attic, or basement. Can become the cause of mold growth in your basement.