manthorpe building products Product Information Sheet · Drop Down Loft Access Door GL250 1 of 3...

manthorpe building products Product Information Sheet

CODE

MANTHORPE BUILDING PRODUCTS LTDMANTHORPE HOUSEBRITTAIN DRIVECODNOR GATE BUSINESS PARKRIPLEYDERBYSHIRE DE5 3ND

TEL: 01773 514 200FAX: 01773 514 262EMAIL:[email protected]

DRN B.H. Date 04.10.12

The company maintains a policy of continuous development of its product range and reserves the right to amend the specification without notice.

DRG No

MBP 8299

Issue

A

Drop Down Loft Access Door GL250

1 of 3

Description

The GL250 drop down loft door is an innovative solution to the need for energy efficient loft space access, offering a cost effective alternative to traditional roof space access. The unobtrusive design coupled with sleek, contemporary styling makes the door an ideal match for modern decors.

The revolutionary design of the multi-point catch mechanism means that the GL250 door can maintain a more effective draught seal around the entire accessible opening, helping to meet the air leakage requirements of Part L of the Building Regulations and preventing the problem of moist warm air entering the roof space causing condensation and heat loss issues.

Product Specifications

Colour White

PackingDetails

Individually packaged in a polythene bag and cardboard box

Box Weight 4.85 kg

Material High Impact Polystyrene

Maunfacturing Process Injection Moulded

Draught Seals Expanded Polyurethane

Insulation 50mm ExpandedPolystyrene

Features - Overview

● Door and frame are fully draught sealed.● Seals supported by 12 perimeter catches.● Sliding door catch operated from a single point.● All hinge, catch and fixing geometry is located outside of the seal, providing no air leakage paths.● Hinge detail hidden when door is locked.● Hinge pivot is positioned to maximise opening.● Innovative design of the hinge makes the door fully removable in seconds.● Screws fix up into timbers, for fast and simple installation and optimum pressure on frame seal.● Fully insulated door panel.● Can be operated by hand or pole (not supplied).● Suitable for use with loft ladders.


CODE





DRG No

MBP 8299

Issue

A


2 of 3

856m

m O

VE

RA

LL

715m

m O

PE

NIN

G

726m

m F

ITTI

NG

686mm OVERALL

545mm OPENING

553mm (min)562mm (max)

22mm

Door Insulation

50mm Expanded Polystyrene

52mmFITTING


CODE





DRG No

MBP 8299

Issue

A


3 of 3

ReferencesAuthor Publication

BSI

Building Regulations

DEFRA

NHBC Standards

BRE

BS 5250:Control of condensation in buildings.BS 9250:Design of the airtightness of ceilings in pitched roofs.

Approved Document L1 & L2:Conservation of fuel and power.

Robust Details

Technical Guidance 7.2:Pitched Roofs.

Digest Report 262:Thermal Insulation: Avoiding Risks.Digest Report 443:Conventions for U-Value calculations.

Environmental & Air Leakage Assessment

The expanded polystyrene insulation used on the back of the GL250 door has a Global Warming Potential (GWP) of less than 5. The insulation is also CFC/HCFC-free with an Ozone Depletion Potential (ODP) of zero.

The effectiveness of the draught seals on the GL250 have been independently tested by the BRE in accordance with BS EN 13141-1:2004 (test report no. 283-506). The door exceeds the requirements for a “Well Sealed Ceiling” as detailed in BS 5250 with an air leakage rate below 1m³/h at a pressure differential of 2 Pa. This door also meets the Building Regulations Part L ‘reasonable limit’ for the design air permeability of buildings with a rate of less than 10m³/h.m² at 50Pa.

Features - Explained

Many drop down hatches suffer from ‘sagging’ over time, a problem that can cause the middle of the door to bow away from the draught seal, creating an air leakage path. To prevent this issue, the GL250 door has 12 independent catch points located around the perimeter of the frame, operated from a single position with a unique sliding mechanism.

With the sliding cover replacing a conventional twist action locking mechanisms on the door, all of the hinge, catch and fixing geometry has been carefully located outside of the draught seal, meaning that there are no holes through the door that could pose an air leakage risk. When the cover is located in the fully closed position it also completely conceals the hinge detail.

The positioning of the doors pivot point is intended to maximise the accessible area available to the user when the door is open and the pioneering hinge design allows for it to be fully removed from the frame quickly and easily for simpler installation and better access with larger insulation options. The fixings for the frame also screw directly up into the ceiling for easier installation, also providing pressure in the optimum direction for the frame to ceiling seal.

The back of the door panel has been optimised to increase the amount of space available for insulation, allowing the 50mm of expanded polystyrene to cover a greater area within the structural opening to create a better thermal barrier.

The catch mechanism can be easily operated with a pole (not supplied) or by hand. The door can also be used in conjunction with the GLL256 and GLL257 loft ladders and can be operated by the pole supplied with them.


CODE





DRG No

MBP 8300

Issue

A

Drop Down Loft Access Door GL250-035-EPS

1 of 3

Description

The GL250-035-EPS drop down loft door is an innovative solution to the need for energy efficient loft space access, offering a cost effective alternative to traditional roof space access. The unobtrusive design coupled with sleek, contemporary styling makes the door an ideal match for modern decors.

The revolutionary design of the multi-point catch mechanism means that the GL250-035-EPS door can maintain a more effective draught seal around the entire accessible opening, helping to meet the air leakage requirements of Part L of the Building Regulations and preventing the problem of moist warm air entering the roof space causing condensation and heat loss issues.

Product SpecificationsColour White

PackingDetails

Individually packed in a polythene bag and boxed

Box Weight 5.40 kg





U-Value 0.35W/m²k

Features - Overview



CODE





DRG No

MBP 8300

Issue

A


2 of 3

856m

m O

VE

RA

LL

715m

m O

PE

NIN

G

726m

m F

ITTI

NG

686mm OVERALL

545mm OPENING


22mm

Door Insulation110mm Expanded

Polystyrene

U-Value 0.35W/m²k

52mmFITTING


CODE





DRG No

MBP 8300

Issue

A


3 of 3


BSI


DEFRA

NHBC Standards

BRE



Robust Details




The expanded polystyrene insulation used on the back of the GL250-035-EPS door has a Global Warming Potential (GWP) of less than 5. The insulation is also CFC/HCFC-free with an Ozone Depletion Potential (ODP) of zero.



Many drop down hatches suffer from ‘sagging’ over time, a problem that can cause the middle of the door to bow away from the draught seal, creating an air leakage path. To prevent this issue, the GL250-035-EPS door has 12 independent catch points located around the perimeter of the frame, operated from a single position with a unique sliding mechanism.



The back of the door has been optimised to increase the amount of space available for insulation, allowing the 110mm of expanded polystyrene to cover a greater area within the structural opening to create a better thermal barrier, offering a U-Value of 0.35W/m²k.



CODE





DRG No

MBP 8301

Issue

A

Drop Down Loft Access Door GL250-035-PU

1 of 3

Description

The GL250-035-PU drop down loft door is an innovative solution to the need for energy efficient loft space access, offering a cost effective alternative to traditional roof space access. The unobtrusive design coupled with sleek, contemporary styling makes the door an ideal match for modern decors.

The revolutionary design of the multi-point catch mechanism means that the GL250-035-PU door can maintain a more effective draught seal around the entire accessible opening, helping to meet the air leakage requirements of Part L of the Building Regulations and preventing the problem of moist warm air entering the roof space causing condensation and heat loss issues.


PackingDetails


Box Weight 5.40 kg




Insulation 60mm Polyurethane

U-Value 0.35W/m²k

Features - Overview



CODE





DRG No

MBP 8301

Issue

A


2 of 3

856m

m O

VE

RA

LL

715m

m O

PE

NIN

G

726m

m F

ITTI

NG

686mm OVERALL

545mm OPENING


22mm

52mmFITTING

Door Insulation

60mm PolyurethaneU-Value 0.35W/m²k


CODE





DRG No

MBP 8301

Issue

A


3 of 3


BSI


DEFRA

NHBC Standards

BRE



Robust Details




The polyurethane insulation used on the back of the GL250-035-PU door has a Global Warming Potential (GWP) of less than 5. The insulation is also CFC/HCFC-free with an Ozone Depletion Potential (ODP) of zero.



Many drop down hatches suffer from ‘sagging’ over time, a problem that can cause the middle of the door to bow away from the draught seal, creating an air leakage path. To prevent this issue, the GL250-035-PU door has 12 independent catch points located around the perimeter of the frame, operated from a single position with a unique sliding mechanism.



The back of the door has been optimised to increase the amount of space available for insulation, allowing the 60mm of polyurethane to cover a greater area within the structural opening to create a better thermal barrier, offering a U-Value of 0.35W/m²k.



CODE





DRG No

MBP 8302

Issue

A


1 of 3

Description

The GL250-015-PU drop down loft door is an innovative solution to the need for energy efficient loft space access, offering a cost effective alternative to traditional roof space access. The unobtrusive design coupled with sleek, contemporary styling makes the door an ideal match for modern decors. This highly insulated door offers a U-Value of 0.15W/m2K, which is ideal for those looking to meet the higher levels of the Code for Sustainable Homes.



PackingDetails


Box Weight 6.80 kg





U-Value 0.15W/m²k

Features - Overview



CODE





DRG No

MBP 8302

Issue

A


2 of 3

856m

m O

VE

RA

LL

715m

m O

PE

NIN

G

726m

m F

ITTI

NG

686mm OVERALL

545mm OPENING


22mm

52mmFITTING

Door Insulation150mm Polyurethane

U-Value 0.15W/m²k


CODE





DRG No

MBP 8302

Issue

A


3 of 3


BSI


DEFRA

NHBC Standards

BRE



Robust Details




The polyurethane insulation used on the back of the GL250-015-PU door has a Global Warming Potential (GWP) of less than 5. The insulation is also CFC/HCFC-free with an Ozone Depletion Potential (ODP) of zero.








Fitting Instructions

Manthorpe Building Products LimitedManthorpe House, Brittain Drive, Codnor Gate Business Park, Ripley, Derbyshire DE5 3ND

T: (01773) 514200 F: (01773) 514262 E: [email protected]: http://www.manthorpe.co.uk

Other products from the Manthorpe Range include Cavity Trays, Cavity Closer, Loft Doors, Roof Ventilation, Through Wall Ventilation, Joist Seals and Dry Roofing Products.

The GL250 is available with a range of insulation options.

The GL251 door offers the additional security of a key lock

Codes: GL251, GL251-035-EPS, GL251-035-PU and GL251-015-PU

GL250

GL250-035-EPS

GL250-035-PU

GL250-015-PU GL250 Drop DownLoft Access Door

The Complete Range

Lockable Variant

Supplied with a key lock


110mm Expanded PolystyreneU-Value 0.35W/m²k



InstallationPreparationBefore installation of the door, first prepare a suitable opening in the ceiling to the dimensions shown below, ensuring there is at least 100mm between the edge of the opening and any wall or obstruction. The GL250 is intended to suit trusses spaced at 600mm centres and can accommodate both 38mm and 47mm truss widths.

726mm


1. Unlock the door

The door should be removed from the frame prior to installation.

To unlock the door, hold the frame securely whilst using the catch recess to slide the cover into the open position. Once the cover is slid into the open position, the door will be unlocked and can then be hinged open.

OPENCLOSE

��

2. Remove the door

Too fully remove the door from the frame; first hinge the door open by 90°, at this point the hinge detail can be disengaged.

Guide the hinge lugs squarely downward, clear of the frame channels, then slide them across and upward, lifting them through the gaps in the frame.

Once removed place the door safely to one side whilst the frame is fitted.

3. Fitting the frameLocate the frame into the prepared opening, pushing it tightly against the ceiling to form an airtight seal.

Ensuring that it is located squarely within the opening, fix the frame in place using the 12 screws provided.

x 12

4. Replace the door

Once the frame is installed into the ceiling opening, the door can be refitted.

To replace the door, first ensure the cover is slid into the open position so the hinges are exposed and then push them up into the frame and toward the opening to hook them back into position.

Ensure all of the hinges are correctly located and the door swings freely before attempting to close it.

5. Close the doorTo close the door, place a finger or pole within the catch recess and push the door back into a horizontal position, flush against the frame.

Then slide catch recess back into the closed position to lock the door, until the cover aligns with the frame.

THIS IS NOT A STRUCTURAL PRODUCT AND MUST NOT BE

STEPPED OR WALKED ON.OPENCLOSE

WARNING:Do not over tighten the fixing screws as this can distort the frame and may cause the door to become stiff to operate. If this occurs, undo the fixings screws by 1 - 2 turns.


CODE





DRG No

REFMBP-0952-00

Issue

A

Drop Down Loft Access Door - Operating Instructions GL250

1 of 1

To unlock the door, use the catch recess to slide the cover into the open position.

The door can be unlocked by hand or by using a pole (not supplied with the door). The pole and attachment supplied with the Manthorpe Loft Ladders can also be used to operate the catch.

Once the cover is slid into the open position, the door will unlock and can then be hinged down and guided into the hanging position. It is recommended that you do not allow the door to drop down unsupported.

OPENCLOSE

To close the door, place a fi nger or pole within the catch recess and push the door back into a horizontal position, fl ush against the frame. Then slide catch recess back into the closed position, until the cover aligns with the frame.

The door can be completely removed from the frame for easier access if required. To remove the door, allow it to fi rst hang freely at 90° to the frame. Then grip the door fi rmly with both hands and push the door upwards to disengage the hinges. The hinges can then be pushed backward away from the opening to allow them to drop through the gaps in the frame (Fig.2).

To replace the door, fi rst ensure the cover is slid into the open position so the hinges are exposed and then push them up into the frame and toward the opening to hook them back into position. Ensure all of the hinges are correctly located and the door swings freely before attempting to close it.

TO REMOVEDOOR

TO RE-FITDOOR

HATCH OPENING

Fig.2

Fig.1

THIS IS NOT A STRUCTURAL PRODUCT AND MUST NOT BE WALKED OR STEPPED ON


CODE





DRG No

MBP 8303

Issue

A

Lockable Drop Down Loft Access Door GL251

1 of 3

DescriptionThe GL251 lockable drop down loft door is an innovative solution to the need for energy efficient loft space access for use in shared accommodation, offering a cost effective alternative to traditional means of access. The unobtrusive design coupled with sleek, contemporary styling makes the door an ideal match for modern decors. It is supplied with a key lock for additional security.

The revolutionary design of the multi-point catch mechanism means that the GL251 door can maintain a more effective draught seal around the entire accessible opening, helping to meet the air leakage requirements of Part L of the Building Regulations and preventing the problem of moist warm air entering the roof space causing condensation and heat loss issues.

Product Specifications

Colour White

PackingDetails

Individually packaged in a polythene bag and cardboard box

Box Weight 4.91 kg





Features - Overview

● Door and frame are fully draught sealed.● Seals supported by 12 perimeter catches.● Sliding door catch operated from a single point.● All hinge, catch and fixing geometry is located outside of the seal, providing no air leakage paths.● Hinge detail hidden when door is locked.● Hinge pivot is positioned to maximise opening.● Innovative design of the hinge makes the door fully removable in seconds.● Screws fix up into timbers, for fast and simple installation and optimum pressure on frame seal.● Fully insulated door panel.● Operated by hand via the key lock.● Suitable for use with loft ladders.



CODE





DRG No

MBP 8303

Issue

A


2 of 3

856m

m O

VE

RA

LL

715m

m O

PE

NIN

G

726m

m F

ITTI

NG

686mm OVERALL

545mm OPENING


22mm

Door Insulation


52mmFITTING


CODE





DRG No

MBP 8303

Issue

A


3 of 3


BSI


DEFRA

NHBC Standards

BRE



Robust Details




The expanded polystyrene insulation used on the back of the GL251 door has a Global Warming Potential (GWP) of less than 5. The insulation is also CFC/HCFC-free with an Ozone Depletion Potential (ODP) of zero.



Many drop down hatches suffer from ‘sagging’ over time, a problem that can cause the middle of the door to bow away from the draught seal, creating an air leakage path. To prevent this issue, the GL251 door has 12 independent catch points located around the perimeter of the frame, operated from a single position with a unique sliding mechanism.



The back of the door has been optimised to increase the amount of space available for insulation, allowing the 50mm of expanded polystyrene to cover a greater area within the structural opening to create a better thermal barrier.

The door is unlocked by hand using the key supplied, once unlocked the key can then be used to slide open the catch mechanism. The door can also be used in conjunction with the GLL256 and GLL257 loft ladders.


CODE





DRG No

MBP 8304

Issue

A

Lockable Drop Down Loft Access Door GL251-035-EPS

1 of 3

DescriptionThe GL251-035-EPS lockable drop down loft door is an innovative solution to the need for energy efficient loft space access for use in shared accommodation, offering a cost effective alternative to traditional means of access. The unobtrusive design coupled with sleek, contemporary styling makes the door an ideal match for modern decors. It is supplied with a key lock for additional security.

The revolutionary design of the multi-point catch mechanism means that the GL251-035-EPS door can maintain a more effective draught seal around the entire accessible opening, helping to meet the air leakage requirements of Part L of the Building Regulations and preventing the problem of moist warm air entering the roof space causing condensation and heat loss issues.

Features - Overview




PackingDetails


Box Weight 5.40 kg





U-Value 0.35W/m²k


CODE





DRG No

MBP 8304

Issue

A


2 of 3

856m

m O

VE

RA

LL

715m

m O

PE

NIN

G

726m

m F

ITTI

NG

686mm OVERALL

545mm OPENING


22mm

Door Insulation

52mmFITTING

Door Insulation110mm Expanded

Polystyrene

U-Value 0.35W/m²k


CODE





DRG No

MBP 8304

Issue

A


3 of 3


BSI


DEFRA

NHBC Standards

BRE



Robust Details




The expanded polystyrene insulation used on the back of the GL251-035-EPS door has a Global Warming Potential (GWP) of less than 5. The insulation is also CFC/HCFC-free with an Ozone Depletion Potential (ODP) of zero.

The effectiveness of the draught seals on the GL251-035-EPS have been independently tested by the BRE in accordance with BS EN 13141-1:2004 (test report no. 283-506). The door exceeds the requirements for a “Well Sealed Ceiling” as detailed in BS 5250 with an air leakage rate below 1m³/h at a pressure differential of 2 Pa. This door also meets the Building Regulations Part L ‘reasonable limit’ for the design air permeability of buildings with a rate of less than 10m³/h.m² at 50Pa.


Many drop down hatches suffer from ‘sagging’ over time, a problem that can cause the middle of the door to bow away from the draught seal, creating an air leakage path. To prevent this issue, the GL251-035-EPS door has 12 independent catch points located around the perimeter of the frame, operated from a single position with a unique sliding mechanism.



The back of the door has been optimised to increase the amount of space available for insulation, allowing the 110mm of expanded polystyrene to cover a greater area within the structural opening to create a better thermal barrier, offering a U-Value of 0.35W/m²k.



CODE





DRG No

MBP 8305

Issue

A

Lockable Drop Down Loft Access Door GL251-035-PU

1 of 3

DescriptionThe GL251-035-PU lockable drop down loft door is an innovative solution to the need for energy efficient loft space access for use in shared accommodation, offering a cost effective alternative to traditional means of access. The unobtrusive design coupled with sleek, contemporary styling makes the door an ideal match for modern decors. It is supplied with a key lock for additional security.


Features - Overview




PackingDetails


Box Weight 5.40 kg





U-Value 0.35W/m²k


CODE





DRG No

MBP 8305

Issue

A


2 of 3

856m

m O

VE

RA

LL

715m

m O

PE

NIN

G

726m

m F

ITTI

NG

686mm OVERALL

545mm OPENING


22mm

52mmFITTING



CODE





DRG No

MBP 8305

Issue

A


3 of 3


BSI


DEFRA

NHBC Standards

BRE



Robust Details




The expanded polystyrene insulation used on the back of the GL251-035-PU door has a Global Warming Potential (GWP) of less than 5. The insulation is also CFC/HCFC-free with an Ozone Depletion Potential (ODP) of zero.

The effectiveness of the draught seals on the GL251-035-PU have been independently tested by the BRE in accordance with BS EN 13141-1:2004 (test report no. 283-506). The door exceeds the requirements for a “Well Sealed Ceiling” as detailed in BS 5250 with an air leakage rate below 1m³/h at a pressure differential of 2 Pa. This door also meets the Building Regulations Part L ‘reasonable limit’ for the design air permeability of buildings with a rate of less than 10m³/h.m² at 50Pa.








CODE





DRG No

MBP 8306

Issue

A


1 of 3

DescriptionThe GL251-015-PU lockable drop down loft door is an innovative solution to the need for energy efficient loft space access for use in shared accommodation. The unobtrusive design coupled with sleek, contemporary styling makes the door an ideal match for modern decors. This highly insulated door offers a U-Value of 0.15W/m2K, which is ideal for those looking to meet the higher levels of the Code for Sustainable Homes, it is also supplied with a key lock for additional security .


Features - Overview




PackingDetails


Box Weight 6.80 kg





U-Value 0.15W/m²k


CODE





DRG No

MBP 8306

Issue

A


2 of 3

856m

m O

VE

RA

LL

715m

m O

PE

NIN

G

726m

m F

ITTI

NG

686mm OVERALL

545mm OPENING


22mm

52mmFITTING

Door Insulation150mm Polyurethane

U-Value 0.15W/m²k


CODE





DRG No

MBP 8306

Issue

A


3 of 3


BSI


DEFRA

NHBC Standards

BRE



Robust Details




The expanded polystyrene insulation used on the back of the GL251-015-PU door has a Global Warming Potential (GWP) of less than 5. The insulation is also CFC/HCFC-free with an Ozone Depletion Potential (ODP) of zero.

The effectiveness of the draught seals on the GL251-015-PU have been independently tested by the BRE in accordance with BS EN 13141-1:2004 (test report no. 283-506). The door exceeds the requirements for a “Well Sealed Ceiling” as detailed in BS 5250 with an air leakage rate below 1m³/h at a pressure differential of 2 Pa. This door also meets the Building Regulations Part L ‘reasonable limit’ for the design air permeability of buildings with a rate of less than 10m³/h.m² at 50Pa.







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