Can you put loft insulation over loft boards?

Yes you can most certainly overlay and additional layer of insulation over the chipboard. I would leave the insulation short at the eaves though to ensure there is adequate ventilation in the loft space. This would most certainly improve you homes thermal performance during winter months.

How do you insulate a boarded loft?

Use a downlight cover such as a Loft Lid before rolling insulation over the fittings. Don't block any vents such as soffit vents with insulation. Don't squash the insulation as this can reduce its thermal performance by over 50%. Don't install loft boards directly to joists or trusses.

Can I insulate on top of floorboards?

If you are insulating an existing concrete floor, then insulation can be added over the top of the floor. If the solid floor is being removed or the project is a new build then it is possible to insulate beneath the solid floor.

Do you need a gap between insulation and loft boards?

When you use solid insulation board to create a warm loft the key thing to remember is ventilation – you must keep a 50mm gap between the roof and the rigid insulation board. We would always recommend having a breathable membrane in place between the tiles and the rafters too to allow the roof to breathe.

Can you put insulation on top of plywood?

I agree that as long as the insulation under the plywood is tight to the bottom of the plywood that laying additional insulation on top should be fine. The plywood should add a little insulating value itself.

DIY Loft/Attic Insulation with over-boarding for Storage [Superhome59 Video part 10]

Can you insulate over plywood in attic?

TOM: Yeah, it could because plywood's not really much of an insulator. What you could do is you could put insulation down in the floor joist first then plywood over it and then you could add another layer of unfaced on top of that.

Can I put insulation over plywood in attic?

1. Clear out the attic, and make sure that all electrical wires are connected inside approved electrical boxes. If you have recessed lighting fixtures, make sure that they are IC rated, which means you can cover them with insulation and plywood without creating a fire hazard.

Can I insulate the underside of my roof?

Open-cell spray polyurethane foam or closed-cell spray polyurethane foam (ccSPF) insulation can be sprayed along the underside of the roof sheathing to provide a conditioned and insulated attic space that can be durable and efficient in all climate zones (see Figure 1).

Can I use loft insulation under floorboards?

Solid insulation board (as in the picture below) or rolls of mineral fibre (like that used to insulate lofts) can be fitted between the flooring joists. If your floor is above an unheated cellar or basement you will need to fit the insulation snugly between the joists and secure in place with netting if required.

How do you insulate attic floor boards?

This could be accomplished by boring holes in the floorboards and inserting the nozzle of an insulation blower machine into the holes. The insulation will fill up the cavities. This would yield the best bang for the buck, as it would place the insulation immediately above the area where it is needed most.

Are floorboards cold in winter?

Solid timber flooring doesn't store heat, but it doesn't become as cold as other denser materials. You can further warm up timber flooring by adding rugs and hall runners. Timber tends to shrink and expand in extremes of temperature and humidity, making it best avoided in climates that vary from very dry to very moist.

Does loft boarding cause condensation?

How Standard Loft Boarding Can Damage Your Property. Can cause damp – as standard boarding is placed onto the joists of your roof, this will inevitably squash your insulation, which stops it from working and will cause condensation to build up as it doesn't have room to breathe.

Should I remove old loft insulation before laying new?

In most circumstances removing your old insulation isn't necessary and it can actually be quite beneficial to leave it. This is as most insulation will retain its thermal properties so leaving it in place will mean that you continue to benefit from it whilst also having an additional layer of insulation on top!

Does a boarded loft add value?

The biggest loss of heat in a building is through the roof, and boarding your loft strengthens the insulation. A boarded loft is also likely to add value to your home — a mixture of energy efficiency, convenience and the simple fact that it looks a lot nicer than a loft with bare joists.

Do loft boards improve insulation?

By installing raised loft boarding which doesn't damage your insulation, you can decrease the heat loss through the roof of your home as well as save money on energy bills as a result of the improved insulation.

Should I insulate my floor joists?

Insulating the joists can help create an effective vapor barrier that will keep humidity from sneaking inside your basement and causing the joists to expand and contract. This can be beneficial if you have hardwood floors and are all worried about moisture seeping up from the panels due to bad insulation.

Can attic insulation touch the roof?

Attic insulation should not touch the roof. Although it can be tempting to over insulate, resist the urge. Too much insulation hinders airflow and can keep excess moisture from escaping, especially in attics.

Can you have too much insulation in your attic?

It's possible to over-insulate an attic as too much will cause moisture buildup and eventually result in mold. Eventually, adding more insulation leads to diminishing returns in trapping heat as well.

Should attic rafters be insulated?

Insulating between rafters will do no good, because the attic should be ventilated, and the rafter insulation would be between two unheated spaces. You can add insulation to the floor; the more the merrier. Just don't put it in the eaves. Also, make sure the attic is well ventilated.

How do you cover insulation in the attic?

The good solution for this is a house wrap material (often referred to by the popular commercial brand Tyvek) which allows vapor to pass through while blocking water itself on the outside of the home. You can also put up a thin board, plywood, or even drywall, if the goal is simply to prevent accidental contact.

Should I remove the old attic insulation?

Unless it's water damaged or rodent-infested, you do not need to remove your attic insulation. Remember, if you are concerned about dust and air quality, you need to have your attic air sealed to separate the attic from the house before you add more insulation, otherwise you'll just make the dust problem worse.

Can you put insulation over subfloor?

Insulation should be fully "aligned" with the air barrier, i.e., in full contact with the subfloor above. There should be no gaps between the insulation and the sheathing above it like those seen in Figure 5. (EPA 2011). Batt insulation should fit tightly between the floor joists but avoid gaps, compressions, or voids.