Use a straightedge and a sharp knife to make clean cuts. Exterior foam insulation has the benefit of warming the wall cavity and reducing the likelihood of condensation in the wall. To attach the insulation, you can use screws with large washers, a special adhesive made for adhering foam board insulation or, for smaller pieces, you can seal them in with caulk or spray foam. After that, thin furring strips are installed on top of the foam to provide a firm base for the drywall screws and drywall. One’s choice depends on the R value needed and where it will be installed. More specifically, it adds to the overall R value, which can be relatively substantial depending on the type and thickness of the insulation that is installed. [B][U]First a l... How to attach bead board or panel to foam insulation? Tape all vertical seams using a foil tape compatible with the … How to insulate house walls from the outside. It is available in several thicknesses and R-values. I read in one of your articles when putting up rigid fome to Install two inches of rigid insulation board directly against concrete. Connect furring strips at the top of the wall with the same spacing of the screws. I am insulating the outside of a cabin with 1.5 inch foam board - no insula... Why Do You Need a Moisture Barrier Under Laminate Flooring? Press insulation board against the wall and butt board edges tightly together (Figure 3). All rights reserved. Remodeling a small bathroom in the basement and want to attach either p... [ATTACH]83498[/ATTACH] Is it a good idea? In short, you could install either interior or exterior insulation on your basement wall, but exterior insulation will probably be easier to detail in your situation. I am currently working on finishing my basement in southern new jersey and ... vapour barrier or not with sealed foam board already on basement wall? The best way to insulate the interior side of a basement wall is with foam insulation that is adhered to or sprayed directly on the concrete. A mold expert told me to put the board on top of the framing, not directly onto the concrete wall so the house can breath. Copyright© But you are saying to put the boards against the wall. Spray foam is also an option, but usually a lot more expensive than foam boards. Read those links above, and I would say start with the one about why basements are moldy, and I think all this will make more sense. What is the right course of action? Adding extra insulation to the exterior walls of an older home when renovating or remodeling is a great way of improving a home's walls thermal performance and reducing energy use while reducing heating bills, carbon footprint and improving a building's comfort level. It does not soak up moisture as quickly. This way the moisture in the cinderblocks can pass through to the interior of the basement and be managed by ventilation equipment or even  a dehumidifier. There is no perfect wall system — each has pros and cons. Use … There is no signs of water, just humidity. Choose carefully between Polyisocyanurate, EPS & XPS or Mineral Wool & Hemp as the wrong choice can reduce insulati…, Despite the good intentions, Earthships in cold climates can't work because they contradict the laws of physics. Foam board has various thickness and R values. Foam board insulation is a rigid polystyrene product that is available in varying thicknesses and density. And due to the laws of physics,  moisture will always want to go where it is dry, which in this case will be your studs, at least until they are completely saturated to the point of equilibrium and the wood just stays as wet as the concrete wall. Balanced insulation when building a Green Home means applying your insulati…, Basements in Canada & USA face serious challenges: fluctuating water tables, surface floods, thermal shock, radon gas infiltration, condensation, mold, mildew,…. Originally Published: January 07, 2019 Suffice it to say that if your basement walls get wet every spring or every time you get a heavy rain, the walls should not be insulated until the water-entry problem is solved. MH or SF Polyurethane Adhesive or appropriate construction-grade adhesive to the wall (Figure 2).Note: Follow adhesive manufacturer recommendations for application pressure and cure times for proper adhesion to masonry walls. 2 INSTALLATION INFORMATION 3. Website operating How to Fix & Prevent Mold in Homes, Preventing Mold when you Insulate your Basement, Building Better Basements: How to Insulate your Basement Properly, stud wall with XPS insulation boards (which are a vapor barrier), best insulation for a basement stud wall in your case would be mineral wool. Remove the existing wall cladding and trim, and inspect the structural integrity of the wall. There should be one strip on every wall, shaping the corner. I would for get yourself a dehumidifier down there and see if you can keep it at 50% RH or lower. Unfaced foam insulation allows some drying to occur. Installing Foam Board Insulation on an Exterior Wall. Cut your polyurethane foam board insulation to fit these measurements. IV. In a corner, fasten two furring strips. Wrap the walls in construction plastic taut and staple it to the furring strips. One of the preferred products for insulating foundations is Dow XPS extruded polystyrene foam, commonly called “blue board” in the trades. I'm not the Mike Reynolds who invented the Ear…, Homes are often over-insulated in some parts and relatively under-insulated others. Gauge between the furring strips and cut the foam board to fit tightly in the middle of the furring strips. To a builder, it also presents a number of detailing challenges around installing and flashing windows and doors, and securing siding, and exterior trim. Finally, simply apply the rigid foam to the wall, starting at the slab and then pushing it back toward the ceiling joists as in the image below. Seal Vertical Joints With Foil Tape. Adhere and apply the remaining panels. A mold expert told me to put the board on top of the framing, not directly onto the concrete wall so the house can breath. How to Install Rigid Foam Board Insulation at Exterior Wall. Band joist insulation. Use foam insulation. Your 'mold guy' is for sure  in the business of growing it,  not preventing it. Twist the 3-inch side to the wall and leave a space between the screws of at least 6-inches. Can you please explain a bit better what the mold expert told you? Adding Basement Insulation to a Cinder Block Basement. Basements don't h…, Rigid foam insulation boards are different. Installing Rigid Foam Insulation on an Interior Wall, How to Install a Retro Fit Insulation Board, Proper Safety Equipment When Using Spray Foam Insulation, How to Attach a Furring Strip to Dry Foundation Walls, How to Install Vinyl Siding around a Garage Door. The back side is plain, without lettering. Start by measuring the height and width of the wall cavities between the studs. Install damp proofing or a waterproofing membrane on the exterior side of the foundation wall and footing; Install rigid board insulation (XPS or rigid mineral fiber) on the exterior wall from the top of the footing to the bottom of the cladding to at least the minimum R-value specified in the local building code. The mold guy said houses are meant to breath, I'm not sure which way to go. I read in one of your articles when putting up rigid fome to Install two inches of rigid insulation board directly against concrete. For walls that are perpendicular to the building’s first-floor joists, use short … When applying the adhesive, apply it to the corners and along the edges of the rigid foam. 1995-2018 MH Sub I, LLC dba Internet Brands. Step 1 - Prepare the Wall I'm not sure which page you saw but we have a few other pages that I will link here so you can read a bit more indepth, feel free to write back with more specific details as to what you were instructed to do and we will happily offer our two cents. Foam board is particularly effective when used on exterior walls to control heat gain and loss. Sorry for the inconvenience. problems contact webmaster@doityourself.com. to this site, and use it for non-commercial use subject to our terms of use. However, my corners are recessed and rounded. Foam insulation board is available in several different types. But yes, we would put rigid foam boards against the wall THEN the stud wall, you don't want to have organic material exposed to moisture, particularly having a source of moisture on one side and an impermeable or semi-impermeable layer to follow. The word 'breathe' is also perhaps not the right word since it implies air movement, and that is anothter thing you don't want in an insulated wall assemly. Before you install it, check your local building codes. There are many requirements on how to use and install foam board because of moisture and fire concerns. An error occurred. You may freely link In this easy, do-it-yourself video, we show walk you through how to insulate a basement by installing insulation on the exterior foundation walls in order to increase the r-value, save money, and make your basement more comfortable. The mold guy just said to lay the Owen's corning board on top of the wooden frames that are nailed into the cinderblocks. Check the wall framing for any deficiencies, rot, insect damage, etc. home improvement and repair website. All information is provided "AS IS." The best insulation for a basement stud wall in your case would be mineral wool, Rockwool and then drywall overtop. Push the foam board into the adhesive, putting pressure securely down the face of the board to assure proper adhesion. Installing exterior rigid foam board insulation on the exterior of a building can greatly improve the overall thermal performance. submitted to our "DoItYourself.com Community Forums". Installing a layer of exterior foam insulation is one of the most effective ways to reduce foundation energy loss and protect against moisture problems. The recess starts about 7 -8 inches from the corner and is anywhere from 1/2 inch to an inch deeper. Make a curve line from top to bottom attach board and batten directly to foam insulation such a membrane the! On the findings of the wooden frames that are perpendicular to the furring strips are installed on top frame. The cavities of this wall may be filled with supplemental insulation your adhesive is free of solvents which... 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