Yes, in a TYPICAL situation, a house that has too much insulation can have poor ventiliation which can lead to moisture build up and create mold in turn. HOWEVER, if you need to add insulation, there are ways to keep the proper amount of ventilation while increasing insulation.
Thereof, how much roof insulation do I need?
The recommended depth of blanket style insulation (glass or mineral wool) for a loft is 250 to 270 mm. If you already have insulation, but it was put in some time ago, it is worth checking the depth, as only a few years ago the recommended depth of insulation was 200mm, and before that it was as low as 100mm.
Additionally, can you over insulate a loft? If you want to use your loft for storage, you may want to raise the level of the floor in your loft for floor insulation. A layer of insulation can be laid between joists in the floor which can then be covered over with thermally, or acoustically, insulating floor boards.
Hereof, can too much insulation cause condensation?
Insulation can cause condensation. Advances in housing insulation have meant a big increase in condensation problems. Homeowners are being warned to act to prevent damp talking hold. Ironically, condensation and dampness is getting worse as homes become better insulated.
What is the highest R value for insulation on 2×4 wall?
Fiberglass vats are the standard insulator for 2-inch by 4-inch wall framing, and are rated R-11 through R-15. In order to achieve the higher insulation R-value of R-21 a different type of insulation will be required.
19 Related Question Answers Found
Can you put too much insulation in your attic?
Without proper ventilation, a home can build up too much moisture, especially in the attic (warm air rises), which can cause mold problems and, overall, lower indoor air quality. This is not to say that if you have mold in your home, too much insulation is the culprit.
Should I insulate the underside of my roof?
But the best solution is actually to insulate both the attic floor and the underside of the roof. In this way you prevent the heat from the rooms below escaping to the attic rooms above. At the same time, the areas below the roof benefit from increased comfort both during the winter and the summer.
Does roof insulation make a difference?
Insulation batts, correctly installed in the walls and ceilings will vastly reduce the amount of energy required to heat the house in winter, and keep it cool in summer. Yes, not only will you create a more comfortable flooring temperature, you will also save on your energy bills.
Is it better to insulate ceiling or roof?
As mentioned earlier, attic ceiling insulation is easier and less expensive than roof insulation. Installing (or adding) insulation to the ceiling plane is rather straighforward. And you may use very different insulation materials. Cellulose and other fibrous materials are good and inexpensive choices.
What is the best insulation for roofs?
Batts or blanket insulation are the best choice for ceiling insulation if you have a flat ceiling and pitched metal or tile roof. The range of batts and blankets that may be suitable for ceiling insulation include; polyester, natural wool, glass wool and rockwool.
Do you need an air gap for insulation?
Solid walls however must be faced with an insulation product, so they can often eat into floor space depending on the thickness of the insulation as an air gap is needed to prevent condensation and moisture build up. Insulation with a moisture barrier means you don’t need to leave an air gap during installation.
What is best insulation for roof?
Glass wool is a material that is frequently used for this job, as it offers good thermal and sound insulation. Roof insulation boards are popular as well. These can be installed quickly, but the sound insulation is not as good as in the case of glass wool for example.
Does opening windows reduce damp?
When the temperature outside is low, it’ll cool the window glass. Then, when the warm air inside the house comes into contact with the glass, it will react to it and fog it up. But even though condensation is simple — damp is anything but. Damp can’t actually be chased away by simply opening the windows.
Does foam insulation stop condensation?
Insulating with spray foam stops the moisture-laden air from reaching the surface, keeping it from reaching the dew point and then the water vapor in the air does not turn into a liquid. The foam prevents the cold water from meeting the warm air resulting in a lack of condensation.
How do you get rid of condensation on the ceiling?
The Solution to Wall, Ceiling and Window Condensation – In a Nutshell Reduce the amount of moisture you and your family create in the home. Allow any moisture you have created to escape before it condensates. Insulate the external walls, ceilings and upgrade the windows so they don’t get so cold.
Why does my household so much moisture?
Moisture condenses into water droplets when warm, humid air contacts a cool surface. Some heating appliances, such as unvented natural gas or kerosene models, also increase the moisture inside your home. During the winter, windows, walls and doors that lack proper insulation are common cool surfaces.
Why do I get condensation on my bedroom ceiling?
Condensation on your ceiling occurs when the attic space above is poorly ventilated and insulated. When the cool air from your living space rises due to humidity in your home (often from cooking, bathing, or drying clothes), it comes in contact with the warm surface of the ceiling and condensation forms.
Why does my house have too much moisture?
Simply put, high humidity in a home occurs when moisture comes into a home and cannot get out. Apart from your AC not properly removing humidity from the air circulating inside your home, here are three of the most common ways excess moisture gets into your house and causes humidity: Everyday activities.
Why are there water droplets on my ceiling?
Condensation is caused by airborne moisture, millions of minute particles of water suspended in the air. When it comes into contact with a colder surface like glass, a cold ceiling or wall, it reaches dew point and turns back into water droplets.
Is condensation on windows bad?
Window condensation can be downright irritating, and in some cases, it can even damage your home. Condensation can rot wood molding and damage plaster, and the excess moisture in your home, which causes interior condensation, can damage your entire home, not just the areas around the windows.
Does internal wall insulation cause condensation?
The internal surface of an insulated wall will tend to be warmer, reducing the likelihood of condensation forming, but there will be areas – such as where an external wall meets an internal wall – that remain cold. There is a distinct risk of condensation forming in those areas, typically in high-level corners.
Can you lay loft boards on top of insulation?
Boarding over loft insulation can be DIY’d – it isn’t complicated but it will be physically hard work. It is recommended that you have at least 270mm of loft insulation but going for bit more can be convenient.
Does a loft need ventilation?
All cold roofs should have some form of roof ventilation in place to prevent warm air condensing in the loft. This two-way ventilation removes the damp air and creates gentle movement of air in the loft, helping to prevent damage to possessions, mould forming on the ceiling and timbers from rotting.
Can you lay insulation over electrical wires in attic?
If there is not anyinsulation in your attic, fit the insulation between the joists. Don’t compress the insulation to fit behind pipes or wires. Instead cut to the middle of the batt’s thickness so you have a flap under the wire and one over the wire.