FAQ
Below are
some of the most common questions we get asked. Hopefully they will
give you the answers you are looking for, but if not our Technical
Advisory Centre are always on hand to help with technical
questions. Just call 01744 766666 or
email
tech@knaufinsulation.com
For sales and customer service questions, please call or
Customer Service team on
0844 8000135 or email
sales@knaufinsulation.com
Frequently Asked Questions
(click the questions for the answer)
- When using Polyfoam Sarking Board System,
How much of the board sits on top of the rafter?
- Can Crown Loft Roll be used to fire stop
the junction of a party wall in a house with a pitched tiled roof
construction?
- What is the U-Value required as from the
1/4/02 to meet the requirements of Part L when insulation is laid
between joists?
- What is the U-Value required from the
1/4/02 to meet the requirements of Part L when insulation is fitted
between the rafters?
- Do you have a product which can be used
as a fire barrier in a large roof void?
- When installing down lighters within a
ceiling, is there any precaution required with the insulation that
is already laid between the joists?
- I am thinking of installing 200mm
insulation between 100mm deep joists in my loft. I also want to
board it out for use as a storage area. Can you compress the
insulation?
- When using a breather membrane instead of
traditional roofing felt, do I have to counter batten and batten
above it?
- Are any of your products kitemarked for
use as attic insulation?
- What thickness of Crown DriTherm Cavity
Slab (full fill application) is required in a masonry cavity wall
consisting of a brick outer leaf and a 7 N/mm2 block inner leaf to
achieve the 0.35W/m²K U-value to meet the Building
Regulations?
- One of my clients is having trouble with
noisy neighbours i.e. sound is coming through the party wall from
telvision/hi-fi. Is there a simple sound insulation
solution?
- What thickness and type of insulation do
I need in a 63 x 38mm timber frame partition with studs at 600mm
centres and a layer of 12.5mm Knauf Wallboard on each side to
achieve the Building Regulation requirement of 40dB for internal
walls in houses, flats and rooms for residential purposes?
- What thickness and type of insulation do
I need in a 50mm Knauf C steel stud partition at 600mm centres with
12.5mm Knauf Wallboard on each side to achieve the Building
Regulation requirement of 40dB for internal walls in houses, flats
and rooms for residential purposes?
- We want to design a quiet office with a
good level of sound reduction. What level of sound reduction can
you achieve with your insulation?
- I have a sound problem between two
offices. Although the wall gives approximately 48dB ,we can still
hear conversation from the other office. The partitions are built
up to the suspended ceiling, soffit above.
- What are the principal options when
installing cavity wall insulation?
- What thickness of Crown DriTherm Cavity
Slab when used as a part fill insulant within a 102.5mm
Brick/cavity/insulation/100mm Stocks Insulite Block/Plaster
construction would achieve a U Value of 0.35W/m2K to meet the
Building Regulations?
- What minimum residual cavity do you
require when using Crown DriTherm Cavity Slab or Polyfoam
Cavityboard as a partial fill insulant?
- Can you install Crown DriTherm Cavity
Slab below d.p.c. level?
- Is Crown DriTherm Cavity Slab covered by
a British Board of Agrement Certicate?
- What products of yours are covered by
British Board of Agrement Certification for use as cavity wall
insulation?
- I am building a room-in-the-roof
conversion and need to upgrade the fire performance of the floor
without renewing or replacing the existing lath and plaster
ceiling. What can I do?
- Which product do you recommend for
insulating a solid concrete ground floor below a screed in a
domestic property?
- We are building a block of flats and want
to use a timber suspended floor that meets the required sound
insulation level. Which of your products would you
recommend?
- What insulation would you recommend for
insulating between suspended timber floor joists?
- We have some Crown DriTherm Cavity Slab
left over from when we installed cavity wall insulation. Can we use
this to insulate between the floor joists?
- What thickness of screed should I use
with your Polyfoam Floorboard range of products?
- What products do you have for use as a
resilient layer within a concrete intermediate floor to achieve the
requirements of Part E of the Building Regulations for sound
insulation?
- Do you have a product to insulate service
pipes which pass through a separating floor?
- Are Crown and Rocksilk insulation
products safe in the event of a fire?
- Do you have a product that can be used as
a fire barrier in a large roof void?
- Do you have any products which can be
used for fire protection of ductwork?
- Is your Crown range of products
classified as mineral wool?
- Do you have a product to internally line
a duct for acoustic treatment?
- Do you have any Rocksilk products that we
can use to insulate a boiler operating at 400°C?
Dont forget, if you can't find the answer to your question here,
our Technical Advisory Centre are always on hand to help with
technical enquiries. Just call
01744 766666 or email
tech@knaufinsulation.com
For sales and customer service questions, please call or
Customer Service team on
0844 8000135 or email
sales@knaufinsulation.com