Disclaimer
Effective Date: 8 September 2026
Last Updated: 8 September 2026
The information, calculators, tools, charts, diagrams, guides and other resources provided on RoofPitchCalculator.org are intended for general informational, educational and calculation purposes only.
RoofPitchCalculator.org is personally owned and operated by:
Daniel Brooks
Civil Engineer · Founder
RoofPitchCalculator.org
By using this Website, you acknowledge and agree to the limitations described in this Disclaimer.
1. General Information Disclaimer
RoofPitchCalculator.org provides online tools and educational information relating to topics such as:
- Roof pitch
- Roof angle
- Roof slope
- Rise and run
- Rafter length
- Roof pitch factor
- Roof area
- Roof dimensions
- Roofing calculations
- Related mathematical conversions
We aim to make this information useful, clear and mathematically accurate.
However, Website content is general in nature and does not take into account the specific design, condition, location, construction method or requirements of your property or project.
You should not rely on this Website as the sole basis for an important construction, structural, regulatory or safety decision.
2. No Professional Engineering Advice
Although RoofPitchCalculator.org is operated by Daniel Brooks, Civil Engineer and Founder, information provided through this Website does not constitute personalised engineering services.
Use of the Website does not create:
- An engineer-client relationship
- An architect-client relationship
- A contractor-client relationship
- A consultant-client relationship
- Any other professional advisory relationship
The calculators and guides are provided as general tools and educational resources.
For project-specific structural engineering, construction design or safety advice, consult an appropriately qualified professional who can inspect and assess the actual project conditions.
3. Calculator Results Are Estimates
Our calculators use mathematical formulas based on the values entered by the user.
We aim to calculate those values correctly, but the result is only as reliable as:
- The measurements entered
- The assumptions made
- The roof type selected
- The reference points used
- The interpretation of the result
A mathematically correct calculation can still produce a result that does not accurately represent the real roof if the wrong measurements or assumptions are used.
4. User Measurements
You are responsible for the measurements you enter into the Website.
RoofPitchCalculator.org cannot independently verify:
- Roof rise
- Roof run
- Span
- Building width
- Ridge height
- Eaves height
- Roof angle
- Rafter measurements
- Whether a roof is symmetrical
- Whether a ridge is centred
- Whether drawings match the completed structure
For example, a symmetrical gable roof may use half the full span as the run, while a mono-pitch roof generally uses the full horizontal span between its low and high reference points.
Using the wrong run may produce a mathematically correct answer for the wrong roof geometry.
5. Mathematical Accuracy vs Real-World Accuracy
There is an important difference between calculation accuracy and real-world accuracy.
The calculator may correctly evaluate:
Angle=tan−1(RiseRun)\text{Angle}=\tan^{-1}\left(\frac{\text{Rise}}{\text{Run}}\right)
but that does not confirm that the rise and run entered accurately describe the real building.
Real buildings may include:
- Uneven construction
- Structural movement
- Existing alterations
- Construction tolerances
- Off-centre ridges
- Multiple roof pitches
- Complex roof geometry
- Hidden structural details
You should independently verify important measurements before making decisions based on the result.
6. Rafter Length Disclaimer
Where our Website calculates rafter length, the result generally represents the geometric straight-line distance along the slope based on the input rise and run.
It should not automatically be used as a final timber cutting dimension.
Actual rafter construction may require adjustments for:
- Roof overhang
- Ridge boards
- Ridge connections
- Wall plates
- Birdsmouth cuts
- Fascia
- Structural connections
- Construction tolerances
- Timber dimensions
- Project-specific detailing
Use approved construction drawings or qualified professional advice when determining final cutting and installation dimensions.
7. Roof Area Disclaimer
Where the Website calculates roof area or uses a roof pitch multiplier, results are geometric estimates.
They may not automatically include:
- Dormers
- Hips
- Valleys
- Roof openings
- Skylights
- Chimneys
- Parapets
- Overhangs
- Multiple roof planes
- Different roof pitches
- Material overlaps
- Cutting waste
- Installation waste
- Flashings
For complex roofs, each roof plane may need to be measured and calculated separately.
Do not rely on a basic roof-area calculation as a final material-ordering quantity without appropriate checks.
8. Roof Pitch Multiplier Disclaimer
A roof pitch multiplier accounts for the relationship between horizontal projection and sloping distance or surface area.
It does not automatically account for all features of a real roof.
The multiplier should be treated as a geometric calculation tool rather than a complete roofing quantity-survey method.
9. Roofing Material Disclaimer
RoofPitchCalculator.org may discuss general roof pitch ranges or provide examples involving roofing materials.
This information does not confirm whether a specific roofing product is suitable for your roof.
Minimum slope and installation requirements can vary depending on:
- Product
- Manufacturer
- Roofing system
- Underlayment
- Fixing method
- Weather exposure
- Climate
- Warranty conditions
- Building regulations
- Project specifications
Always check the current technical documentation supplied by the manufacturer of the exact roofing product or system being used.
Manufacturer instructions should take priority over general information presented on this Website.
10. Building Codes and Regulations
Building codes, construction regulations and planning requirements vary by jurisdiction and can change over time.
RoofPitchCalculator.org does not guarantee that information on the Website reflects every requirement applicable to:
- Your state
- Your city
- Your county
- Your country
- Your project
- Your building type
A calculator result is not:
- Building-code approval
- Planning approval
- Permit approval
- Engineering approval
- Inspection approval
- Manufacturer certification
You are responsible for checking the rules that apply to your project.
11. Structural Safety Disclaimer
Roof pitch is only one part of roof design.
Our calculators do not determine matters such as:
- Rafter size
- Joist size
- Beam size
- Structural capacity
- Snow-load capacity
- Wind-load resistance
- Connection design
- Foundation loads
- Structural stability
- Roof bracing
- Load paths
- Material strength
Do not use roof pitch alone to make structural design decisions.
Structural design should be carried out or checked by an appropriately qualified professional where required.
12. Safety Disclaimer
Do not climb onto a roof or place yourself at risk simply to obtain measurements for this Website.
Roof measurement may involve hazards including:
- Falls from height
- Ladders
- Fragile roof coverings
- Slippery surfaces
- Electrical hazards
- Unstable structures
- Poor weather
- Falling objects
Where possible, use safer alternatives such as:
- Building drawings
- Internal attic measurements
- Ground-based measurements
- Existing plans
- Professional measurement services
If a measurement cannot be obtained safely, do not attempt it without appropriate skills, equipment and safety procedures.
13. Construction and DIY Disclaimer
Content on RoofPitchCalculator.org should not be interpreted as encouragement to perform construction or roofing work beyond your skills, qualifications or legal authority.
Certain roofing or structural work may require:
- Licensed contractors
- Engineers
- Building permits
- Inspections
- Specialist equipment
- Safety systems
You are responsible for determining what is required for your project.
14. Educational Content
Our articles, examples, charts and guides are intended to help users understand roof geometry and common calculation methods.
Worked examples are illustrative.
A worked example using a 6:12 roof, for instance, does not mean that 6:12 is appropriate for your particular building or roofing system.
15. No Guarantee of Completeness
We make reasonable efforts to keep our content useful and accurate.
However, we do not guarantee that every page will always be:
- Complete
- Error-free
- Current
- Applicable to every jurisdiction
- Applicable to every project
- Compatible with every roofing system
Information may become outdated because of changes in:
- Building codes
- Manufacturer specifications
- Industry standards
- Roofing products
- Construction practices
16. Errors and Corrections
Despite reasonable care, Website content or calculations may occasionally contain:
- Typographical errors
- Technical errors
- Coding errors
- Display errors
- Calculation bugs
- Incorrect links
- Outdated information
If you believe you have found an error, please contact us or use our feedback form.
Email: support@roofpitchcalculator.org
We appreciate reports that help us improve our tools and content.
17. Website Availability
We do not guarantee uninterrupted access to RoofPitchCalculator.org.
The Website may occasionally be unavailable due to:
- Maintenance
- Hosting problems
- Software updates
- Technical failures
- Security incidents
- Network problems
- Events beyond our reasonable control
You should not rely on the Website as the sole location for storing important project information.
18. Third-Party Sources
Our guides may refer to or link to third-party sources such as:
- Building-code resources
- Manufacturer documentation
- Industry organisations
- Technical publications
- Other websites
We may use external sources to support or explain general information.
However, we do not control third-party content and cannot guarantee that it will remain:
- Available
- Correct
- Current
- Unchanged
Always check the current version of important third-party documentation.
19. External Links
RoofPitchCalculator.org may contain links to websites that we do not own or control.
We are not responsible for their:
- Content
- Accuracy
- Security
- Privacy practices
- Products
- Services
- Availability
Following an external link is at your own discretion.
20. Google Analytics and Search Console
RoofPitchCalculator.org uses services including Google Analytics 4 and Google Search Console to understand Website performance, search visibility and general visitor behaviour.
These tools do not determine or modify calculator results.
For information about data collection and cookies, please read our:
Privacy Policy/privacy-policy/
and
Cookie Policy/cookie-policy/
21. Advertising Disclaimer
RoofPitchCalculator.org may display advertising now or in the future.
Advertising does not determine:
- Calculator formulas
- Calculator results
- Technical explanations
- Editorial conclusions
The presence of an advertisement should not be interpreted as professional endorsement of a product or service unless we specifically state otherwise.
22. Affiliate Disclaimer
RoofPitchCalculator.org may introduce affiliate links in the future.
If we receive a commission from a qualifying purchase, appropriate disclosure will be provided where required.
An affiliate relationship does not mean that a product is suitable for every user or project.
You remain responsible for evaluating products and services before purchasing or using them.
23. No Warranty
To the maximum extent permitted by applicable law, RoofPitchCalculator.org and its content are provided on an:
“as is” and “as available” basis.
We do not make an absolute warranty that:
- Every calculation will suit every project
- Every result will be error-free
- Every page will remain current
- The Website will always be available
- Every user will interpret results correctly
- Every third-party source will remain accurate
Nothing in this Disclaimer limits rights that cannot lawfully be excluded.
24. Limitation of Liability
To the maximum extent permitted by applicable law, RoofPitchCalculator.org and Daniel Brooks will not be liable for indirect, incidental, consequential, special or similar losses arising from use of or reliance on the Website.
This may include losses relating to:
- Incorrect measurements
- Incorrect assumptions
- Incorrect interpretation of results
- Construction errors
- Material purchases
- Excess or insufficient material quantities
- Project delays
- Property damage
- Loss of revenue
- Professional fees
- Website outages
- Reliance on outdated information
- Failure to obtain qualified professional advice
Nothing in this section excludes liability where exclusion is prohibited by law.
25. Your Responsibility
You are responsible for deciding whether information provided by RoofPitchCalculator.org is suitable for your intended purpose.
For important decisions involving:
- Structural safety
- Construction
- Building regulations
- Roofing-system suitability
- Material ordering
- Professional work
you should independently verify the relevant information.
A calculator can assist with mathematics. It cannot inspect your building, assess hidden conditions or make a complete professional judgement about your project.
26. Professional Verification
Where a calculation may affect construction, safety or regulatory compliance, we recommend having the relevant measurements and results reviewed by an appropriately qualified person.
Depending on the project, this may include:
- Civil engineer
- Structural engineer
- Architect
- Building professional
- Roofing contractor
- Building inspector
The appropriate professional will depend on the type and location of the project.
27. Changes to This Disclaimer
We may update this Disclaimer as:
- New calculators are added
- New content is published
- Website functionality changes
- Our calculation methods change
- Applicable legal requirements change
- We identify areas that need clearer explanation
The Last Updated date at the top of this page will show when the Disclaimer was most recently revised.
28. Related Policies
You may also wish to review:
Privacy Policy/privacy-policy/
Cookie Policy/cookie-policy/
Copyright / DMCA Policy/dmca-policy/
Disclaimer
29. Contact Us
If you have a question about this Disclaimer or believe that information on RoofPitchCalculator.org requires correction, please contact:
Daniel Brooks
Civil Engineer · Founder
RoofPitchCalculator.org
