My concerns there are (1) will they be able to pour a really good, hard slab in the limited space of the crawl space? Before choosing a spray-foam contractor, ask for references and the names of former customers. Designed to cure quickly. This product fills gaps up to 1″ wide. I love the idea of pouring concrete in the crawl space. If all of the information available on this website is daunting, then you should find an architect, designer, engineer, or builder that you trust and put your project in the hands of the professional you hire. Many insulating foam sealants are specifically designed for certain problem areas, so you can choose the one that best suits your needs. Ask your friends and relatives about professionals they have worked with and trust. The more I know the less sure I am about how to proceed. There are no pesticides included, so it’s non-toxic and won’t harm bees. Besides the obvious goal of insulating the living space (1st and 2nd floors), my goals are: (1) Insulate the basement for future use as a living room. You should also try to avoid placing the cans directly on the ground when not in use. Prices vary by region, market condition and chemical feedstock costs, but about $1-1.25 per square foot per inch of depth is roughly the range. Fire resistance is all over the map. One major benefit of insulating foam sealant is that it also helps block out pests like ants, roaches and spiders — there are even sealants that are specifically designed for this purpose. I believe there are a couple of vents to the outside. (2) will this cause any moisture problems (water coming up from the water table below)? In most situations any more than 2" of closed cell foam carries a bigger lifecycle greenhouse gas burden (due to the HFC245fa blowing agent) than the energy use it offsets. How about open cell spray foam? This multipurpose foam sealant is black, making it a good pick for exterior use. (5) The floor of the crawl space is rock and dirt. Unlike most of the other options, a dispensing gun is needed. Dow Chemical is best known for its industrial chemicals and products, but this is a great DIY product from a trusted manufacturer. I am not sure whether that makes it better or worse than the other options. Moya, If it expands too much, it may be harder for you to actually open and close windows and doors. It expands wider than 1″, while many of the options on this list are only suitable for 3/4″ or 1″ gaps. Btw, how expensive is pouring concrete (it's less than 500 sq feet)? Ideally, you will pour a concrete slab on your crawl space floor. This option from Great Stuff is a good general-purpose option for gaps and cracks. The “TriggerPoint” brand of foam rollers have a hollow, plastic core with foam wrapping around it that makes for a much more firmer feel. I am not sure whether the contractor is an expert on insulation however. (1) The climate zone seems to be 6A. Pros: Minimally expanding and low pressure, making it suitable for use on windows and doors without obstructing their normal operation. That makes it a good pick for any larger jobs you may have to do. This won't delete the articles you've saved, just the list. Here are a couple of more facts. See: http://www.buildingscience.com/documents/reports/rr-1001-moisture-safe-unvented-wood-roof-systems/view. All rights reservedPMC Entertainment, Great Stuff Smart Dispenser Gaps & Cracks, Great Stuff Multipurpose Insulating Foam Sealant…, Great Stuff Pestblock 12 oz Insulating Foam…, Great Stuff Gaps & Cracks 20 oz Insulating Foam…. It's a distinctive foam specially designed to seal homes against … I am told mice don't normaly chew through the open cell stuff. Pros: Designed to be extra dense for additional insulative properties. 20-year old house has uninsulated basement (both a crawl space and a concrete part) and attic. That’s where this option comes in. One of the most economical and effective solutions for drafts comes in the form of insulating foam sealant. This option from Great Stuff is specifically formulated for blocking out insects. Cons: Additional measures may be needed if dealing with rodents. SFAIK there is but one cc foam product available in N.America that doesn't have that issue (Icynene MD-R-200,which is ~R5/inch and is water-blown, with a very low carbon footprint.). Thank you both for your thoughtful responses. It expands up to 1″, while some others on this list only expand 3/4″. It expands up to 1″, while some others on this list only expand 3/4″. (3) will the initial drying phase of the concrete harm the house? The insulation has been ruined by rodents. (2) Have a clean, accessible and rodent-proof crawl space that can be used for storage. Like many Great Stuff foam sealants, this one is designed to go on easily and dry quickly. But what’s worse than cold air entering is warm air escaping. Specially formulated with a bitter ingredient that prevents rodents from entering the home. It's probably better bang/buck to use 2" of cc foam and put it on the foundation walls & band joist than to put it on the underside of the subfloor, since it's much easier to achieve a good air tightness that way, and puts anything that's down there (like boiler/furnace/water-heater and stored goods) inside the thermal and pressure envelope of the building. Dow Great Stuff Pestblock. Moya, I use Northeast Sprayfoam. My main concern would be whether that might excacerbate the Radon. (25 mm), forming a long-lasting, airtight and water-resistant barrier. -What questions should I ask to make the installer is qualified (I’ve read that improper installation would be bad). (4) The basement is a walk-out. I understand it absorbs moisture. Pestblock Foam Sealant expands to fill, seal and insulate gaps up to 3", forming a long-lasting, airtight and water resistant barrier.